G10K 11/178 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets d'interférenceMasquage du son par régénération électro-acoustique en opposition de phase des ondes acoustiques originales
2.
Conducted charging and signal transmission in a roll of electrical components on carrier material
A carrier tape has at least two conductive rails affixed at opposite edges of the carrier tape. The purpose of the conductive rails is to provide power to smart labels mounted to the carrier tape for charging the batteries of each of the smart labels or transferring data to or from the smart labels. Holes are pierced into the conductive rails and the carrier tape to make a jagged edge at the backside of each hole in the carrier tape. The jagged edge of each of the holes of the conductive rail and the carrier tape on one layer connects with the conductive rail of the layer immediately adjacent. The smart labels are mounted to the carrier tape with an adhesive. A transport package holds a carrier tape that retains the smart labels and the conductive rails and is configured to transfer charging current or data to the smart labels.
G06K 7/10 - Méthodes ou dispositions pour la lecture de supports d'enregistrement par radiation électromagnétique, p. ex. lecture optiqueMéthodes ou dispositions pour la lecture de supports d'enregistrement par radiation corpusculaire
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
B32B 37/12 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons caractérisés par l'usage d'adhésifs
G06K 19/07 - Supports d'enregistrement avec des marques conductrices, des circuits imprimés ou des éléments de circuit à semi-conducteurs, p. ex. cartes d'identité ou cartes de crédit avec des puces à circuit intégré
B32B 3/26 - Produits stratifiés comprenant une couche ayant des discontinuités ou des rugosités externes ou internes, ou une couche de forme non planeProduits stratifiés comprenant une couche ayant des particularités au niveau de sa forme caractérisés par une couche continue dont le périmètre de la section droite a une allure particulièreProduits stratifiés comprenant une couche ayant des discontinuités ou des rugosités externes ou internes, ou une couche de forme non planeProduits stratifiés comprenant une couche ayant des particularités au niveau de sa forme caractérisés par une couche comportant des cavités ou des vides internes
A method is provided for using a microcontroller for driving an external device, where the microcontroller comprises a processor coupled to a controller, and the controller comprises a state machine coupled to a storage medium configured to store at least one command executable by the state machine. A drive signal is generated using the controller to drive the external device. The storage medium may be configured by the processor with various commands and waveforms for operating different types of external devices. The proposed microprocessor permits reducing power consumption while at the same time allowing for a broad flexibility of use.
A current monitoring circuit for use with an inductor having a magnetizing phase and a de-magnetizing phase is presented. The current monitoring circuit has a voltage controlled oscillator and a first counter. The voltage controlled oscillator generates a clock signal based on a voltage across the inductor. The first counter generates a counter value using the clock signal. The current monitoring circuit may be implemented as part of a switched mode power supply having an inductor coupled to a pair of power switches and a controller adapted to generate a control signal to control the pair of power switches based on the counter value.
H02M 3/158 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p. ex. régulateurs à commutation comprenant plusieurs dispositifs à semi-conducteurs comme dispositifs de commande finale pour une charge unique
H02M 1/00 - Détails d'appareils pour transformation
H02M 3/157 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p. ex. régulateurs à commutation avec commande numérique
G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique
A key word detection apparatus and a method for low-power voice-activated devices are presented. A first signal processing module operates with a first transducer to receive an incoming signal and generates a first sample. A second signal processing module operates with a second transducer which receives an incoming signal and generates a second sample. In summary, a signal processing system, in particular a key word detection system, has a first low power module that wakes up a second higher power module. The second module uses signals from the first module in order to improve accuracy of key word detection or other signal processing tasks.
A digital signal processing system for multiplying a digital value and a digital signal. The digital signal processing system receives the digital value in an encoded format, and multiplies the digital value with the digital signal. The digital value in the encoded format has an offset, which is encoded as a floating point. The disclosure provides a digital processing system that can carry out a multiplication operation with a smaller area, less complexity and/or reduced power usage compared with known multipliers.
G10K 11/178 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets d'interférenceMasquage du son par régénération électro-acoustique en opposition de phase des ondes acoustiques originales
7.
Security apparatus and methods for wireless data exchange
A method of authenticating a first device at a second device for two wirelessly communicating devices, the method comprising: determining the distance between the two devices based on a property of a received communication; at each device, determining at least one shared physical layer property of the communication channel between the two devices; and authenticating the first device based on the determined distance between the two devices and the determined physical layer property of the communication channel.
A digital filter for filtering a pulse density modulation (PDM) signal is presented. The filter has a first filter circuit to receive an input signal and to provide a filtered input signal at successive time steps which include a first filtered value at the first time step and a second filtered value at a second time step. The filter also has a quantizer to provide an output signal comprising output values at successive time steps and a filter variable circuit with a first multiplication circuit to receive the first filter variable, and divide the first filter variable by a first gain factor and a first summing circuit configured to receive the divided first filter variable, receive the output signal, and add the divided first filter variable and the first output value and a second multiplication circuit and a delay circuit.
H04L 25/49 - Circuits d'émissionCircuits de réception à conversion de code au transmetteurCircuits d'émissionCircuits de réception à pré-distorsionCircuits d'émissionCircuits de réception à insertion d'intervalles morts pour obtenir un spectre de fréquence désiréCircuits d'émissionCircuits de réception à au moins trois niveaux d'amplitude
H03M 3/00 - Conversion de valeurs analogiques en, ou à partir d'une modulation différentielle
9.
Adaptive sample and hold circuit for signal amplifier range selection
An adaptive sample and hold circuit for signal amplifier range selection is presented. The adaptive sample and hold circuit has an input for receiving an input signal and an output for providing a sample-and-hold-voltage. It also includes a sample-and-hold-capacitor to generate the sample-and-hold-voltage from the input signal, and a range detector. The range detector is adapted to identify a range of the input signal and to adjust a voltage at the sample-and-hold-capacitor based on the range of the input signal to maintain the sample-and-hold-voltage within a predetermined voltage span.
H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation
H03F 3/38 - Amplificateurs de courant continu, comportant un modulateur à l'entrée et un démodulateur à la sortieModulateurs ou démodulateurs spécialement conçus pour être utilisés dans de tels amplificateurs
H03F 3/181 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale
H03F 3/187 - Amplificateurs à basse fréquence, p. ex. préamplificateurs à fréquence musicale comportant uniquement des dispositifs à semi-conducteurs dans des circuits intégrés
10.
Optimization of a hybrid active noise cancellation system
A computer-implemented method for automatically optimizing a hybrid active noise cancellation system, the hybrid active noise cancellation system comprising a feedback filter and a feedforward filter, the method comprising optimizing the feedforward filter, thereby optimizing the hybrid active noise cancellation system, wherein optimization of the feedforward filter is dependent on the feedback filter.
G10K 11/178 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets d'interférenceMasquage du son par régénération électro-acoustique en opposition de phase des ondes acoustiques originales
H04R 3/02 - Circuits pour transducteurs pour empêcher la réaction acoustique
The present invention discloses a method and a device for performing authenticated ranging measurement by a first radio node. The method comprises receiving a first ranging signal from the second radio node; determining a first ranging parameter based on the first ranging signal; determining a range based on the first ranging parameter; and authenticating the second radio node based on the first ranging signal and authentication setup information comprising a condition on the first ranging signal.
There is presented a driver and a corresponding method for driving a p-type power switch. The driver includes a capacitor coupled to a control terminal of the power switch. The driver is configured to apply a control voltage to the control terminal and to connect the control terminal to ground to reduce the control voltage down to a target value to switch the power switch on. When identifying that the control voltage has reached the target value, the driver disconnects the control terminal from ground. The driver may be used in various circuits including switching power converters, audio amplifiers and charge-pump circuits.
H02M 1/08 - Circuits spécialement adaptés à la production d'une tension de commande pour les dispositifs à semi-conducteurs incorporés dans des convertisseurs statiques
H02M 3/158 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p. ex. régulateurs à commutation comprenant plusieurs dispositifs à semi-conducteurs comme dispositifs de commande finale pour une charge unique
H03K 17/687 - Commutation ou ouverture de porte électronique, c.-à-d. par d'autres moyens que la fermeture et l'ouverture de contacts caractérisée par l'utilisation de composants spécifiés par l'utilisation, comme éléments actifs, de dispositifs à semi-conducteurs les dispositifs étant des transistors à effet de champ
13.
BLE system with multiple topologies and slave to slave communication
A method of communication in a Bluetooth Low Energy (BLE) network comprising a master device and a plurality of slave devices. The method has the steps of: generating a unique identifier parameter comprising a data string having a plurality of bits; assigning to each slave device a unique bit of the unique identifier parameter and a value of the bit representative of active communication; sending from the master device to each slave device a communication which includes the unique identifier parameter; at each slave device, determining the value of the bit assigned to the respective slave device; at each slave device, if the determined value of the bit is representative of active communication, processing the communication, otherwise ignoring the communication.
H04W 4/80 - Services utilisant la communication de courte portée, p. ex. la communication en champ proche, l'identification par radiofréquence ou la communication à faible consommation d’énergie
H04B 1/713 - Techniques d'étalement de spectre utilisant des sauts de fréquence
An arbiter for use with a plurality of request signals is presented. The arbiter includes a sequence identifier to identify an order between the plurality of request signals. The arbiter provides a plurality of output signals in which each output signal is associated with a request signal. When the request signals are provided in a sequential order the output signals are provided in the identified sequential order. When the request signals are provided substantially at the same time the output signals are provided in an arbitrary sequential order. A corresponding signal arbitration method and an electronic circuit comprising the arbiter are also presented.
G06F 13/16 - Gestion de demandes d'interconnexion ou de transfert pour l'accès au bus de mémoire
H03K 19/20 - Circuits logiques, c.-à-d. ayant au moins deux entrées agissant sur une sortieCircuits d'inversion caractérisés par la fonction logique, p. ex. circuits ET, OU, NI, NON
G06F 9/448 - Paradigmes d’exécution, p. ex. implémentation de paradigmes de programmation
H03K 19/00 - Circuits logiques, c.-à-d. ayant au moins deux entrées agissant sur une sortieCircuits d'inversion
15.
Constant current constant voltage charger by means of a pulse skipping boost converter
A charging circuit and a method with an inductor, an input to receive an input voltage, an output, and a switching means is presented. The switching means performs cycles where each cycle includes, switching the circuit such that the inductor enters into an energy charging state in which the inductor stores energy provided by the input voltage. When energy stored in the inductor reaches an energy threshold, the switching circuit operates such that the inductor enters into an energy discharging state in which the inductor provides energy to the output. The energy threshold is based on a predefined maximum energy storage current value and the time between cycles is based on a duration of the energy discharging state.
H02J 7/04 - Régulation du courant ou de la tension de charge
H02J 7/16 - Régulation du courant ou de la tension de charge par variation de champ
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
H03K 5/24 - Circuits présentant plusieurs entrées et une sortie pour comparer des impulsions ou des trains d'impulsions entre eux en ce qui concerne certaines caractéristiques du signal d'entrée, p. ex. la pente, l'intégrale la caractéristique étant l'amplitude
H02M 3/156 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p. ex. régulateurs à commutation
H02J 7/35 - Fonctionnement en parallèle, dans des réseaux, de batteries avec d'autres sources à courant continu, p. ex. batterie tampon avec des cellules sensibles à la lumière
H02M 1/00 - Détails d'appareils pour transformation
16.
Tools and methods for designing feedforward filters for use in active noise cancelling systems
A method of automated feedforward filter design comprising designing a feedforward filter for a system implementing active noise cancelling is described. The method includes designing the feedforward filter by determining a filter transfer function of the feedforward filter. Optionally, the filter transfer function is determined using a least square method. The method also includes determining the filter transfer function by defining a target transfer function of the feedforward filter and applying the least square method using the target transfer function to determine a filter expression for the filter transfer function. Optionally, the least square method is a weighted least square method.
G10K 11/178 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets d'interférenceMasquage du son par régénération électro-acoustique en opposition de phase des ondes acoustiques originales
17.
Conducted charging and signal transmission in a roll of electrical components on carrier material
A carrier tape has at least two conductive rails affixed at opposite edges of the carrier tape. The purpose of the conductive rails is to provide power to smart labels mounted to the carrier tape for charging the batteries of each of the smart labels or transferring data to or from the smart labels. Holes are pierced into the conductive rails and the carrier tape to make a jagged edge at the backside of each hole in the carrier tape. The jagged edge of each of the holes of the conductive rail and the carrier tape on one layer connects with the conductive rail of the layer immediately adjacent. The smart labels are mounted to the carrier tape with an adhesive. A transport package holds a carrier tape which retains the smart labels and the conductive rails and is configured to transfer charging current or data to the smart labels.
G06K 19/06 - Supports d'enregistrement pour utilisation avec des machines et avec au moins une partie prévue pour supporter des marques numériques caractérisés par le genre de marque numérique, p. ex. forme, nature, code
G06K 19/077 - Détails de structure, p. ex. montage de circuits dans le support
A digital filter structure and related method of digital filtering are presented. The digital filter structure is arranged to receive one or more clocked input signals having a first clock rate, and which is driven at a second clock rate higher than said first clock rate. The digital filter structure has a plurality of delay elements and multiplexing circuitry arranged to selectively engage the delay elements such that, at every clock cycle of the digital filter structure, a filter operation is performed on a different stream of data. The disclosure can be applied in many different contexts. One particular implementation example is that of an adaptive noise cancellation (ANC) system using sigma-delta infinite impulse response filters. In this context the present disclosure minimizes latency and hardware implementation area by requiring only one filtering circuit for multiple channels of data to be filtered.
A voltage selection circuit for selecting a voltage from a plurality of input voltages comprising a plurality of diodes, each diode having a first terminal coupled to one of the input voltages, and a current sensor configured to sense a current flow through each diode, wherein the selected voltage is dependent on the sensed current flow. In operation, the circuit functions as a comparator to detect the maximum among the input voltages. The comparator decision is used to close one or more of the power switches to ensure that the load is powered from the highest input voltage.
H03K 19/20 - Circuits logiques, c.-à-d. ayant au moins deux entrées agissant sur une sortieCircuits d'inversion caractérisés par la fonction logique, p. ex. circuits ET, OU, NI, NON
H03K 17/00 - Commutation ou ouverture de porte électronique, c.-à-d. par d'autres moyens que la fermeture et l'ouverture de contacts
20.
Demodulation unit and method for demodulating a DPSK signal
A demodulation unit for recovering a transmitted symbol from a received signal that has been modulated using an MDPSK modulation scheme is described. The demodulation unit is configured to, for a current time instant, derive a current sample of a phase signal indicative of a phase of the received signal. Furthermore, the demodulation unit is configured to determine a set of discrimination signals for the current sample of the phase signal, based on the current sample of the phase signal and based on one or more previous samples of the phase signal for one or more previous time instants. In addition, the demodulation unit is configured to determine the transmitted symbol for the current time instant based on the set of discrimination signals.
The present document discloses circuits and methods for providing an output voltage at an output port. In one of the embodiments, a circuit has a power amplifier having an output. In particular, the circuit may have a first transformer including a first coil and a second coil. Moreover, the circuit may have a first capacitor connected in parallel to the first coil and a second capacitor connected in parallel to the second coil. More particularly, the circuit may be adapted to have a first end of the first coil connected to the output of the power amplifier, and a second end of the first coil connected to the output port of the circuit.
H03F 1/00 - Détails des amplificateurs comportant comme éléments d'amplification uniquement des tubes à décharge, uniquement des dispositifs à semi-conducteurs ou uniquement des composants non spécifiés
H03F 1/02 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire
H03H 7/01 - Réseaux à deux accès sélecteurs de fréquence
H03F 1/56 - Modifications des impédances d'entrée ou de sortie, non prévues ailleurs
H03F 3/195 - Amplificateurs à haute fréquence, p. ex. amplificateurs radiofréquence comportant uniquement des dispositifs à semi-conducteurs dans des circuits intégrés
A single-ended to differential circuit is presented. The circuit may be a single-ended to differential integrator or a single-ended to differential amplifier. The circuit determines a first output and a second output voltage based on an input voltage, first and second reference voltages. The circuit has a first, a second and a third input memory element. The circuit in a first phase, samples a voltage indicative of the input voltage on the first input memory element. The circuit in the first phase, samples a voltage indicative of the first reference voltage on the second input memory element. The circuit in the first phase, samples a voltage indicative of the second reference voltage on the third input memory element. The circuit, in a second phase, determines the first and second output voltage based on the sampled voltages on the first, second, and third input memory elements.
An inverter is presented. The inverter may be configured to receive an input voltage at an input node of the inverter, and to generate an output voltage at an output node of the inverter. The inverter may comprise a first transistor coupled between a supply node and the output node of the inverter. Further, the inverter may comprise a second transistor coupled between the output node of the inverter and a reference node. The input node of the inverter may be coupled to a back-gate of the first transistor and to a back-gate of the second transistor.
H02M 7/537 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p. ex. onduleurs à impulsions à un seul commutateur
24.
Sensing device comprising a phase locked loop circuit
A sensing device with a phase locked loop circuit that has an oscillator to provide an oscillator output signal is presented. The sensing device has a power amplifier to provide at an output of the power amplifier an amplified output signal based on the oscillator output signal. The amplified output signal has an interfering signal component at the oscillator frequency. The sensing device has a measurement circuit to measure offset information regarding a frequency offset between the oscillator frequency and a target frequency of the oscillator. The frequency offset is due to a frequency pulling effect at the oscillator caused by the interfering signal component of the amplified output signal. The sensing device has a control circuit to use the offset information for trimming the phase locked loop circuit and/or the power amplifier, and/or for determining information regarding an environmental situation at the output of the power amplifier.
H03L 7/099 - Détails de la boucle verrouillée en phase concernant principalement l'oscillateur commandé de la boucle
H03F 1/56 - Modifications des impédances d'entrée ou de sortie, non prévues ailleurs
H03L 7/093 - Détails de la boucle verrouillée en phase concernant principalement l'agencement de détection de phase ou de fréquence, y compris le filtrage ou l'amplification de son signal de sortie utilisant des caractéristiques de filtrage ou d'amplification particulières dans la boucle
H03F 1/26 - Modifications des amplificateurs pour réduire l'influence du bruit provoqué par les éléments amplificateurs
H03F 3/24 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C d'étages transmetteurs de sortie
A frequency divider is provided which uses common circuitry to switch between different duty cycle outputs. The divider has one or more memory elements with a feedback loop and which are controllable to adjust a duty cycle of an output signal. Each memory element has a first regenerative cell and a second regenerative cell, and where one of the regenerative cells is a controllable regenerative cell which can be controlled to vary the duty cycle of an output of the frequency divider circuit. The controllable regenerative cell can be selectively activated so that in a first configuration where the controllable regenerative cell is activated an output of the frequency divider circuit has a first duty cycle and in a second configuration where the controllable regenerative cell is deactivated an output of the frequency divider circuit has a second duty cycle.
A signal processing structure and method are presented. A first digital filter operates on received sigma-delta modulated (SDM) input signals. A second pre-processing digital filter receives a SDM input signal, directly low pass filter the SDM input signal and provides an output SDM signal. The output sigma-delta modulated signal is provided as an input for said first digital filter. In standard digital systems operating with digital microphones, filtering of the microphones' output signal requires to first convert the signal into pulse code modulation (PCM), then filter and finally convert back to pulse density modulation (PDM). This approach increases the latency of the system because decimation and interpolation must be performed in order to pass from PDM to PCM. By using filters that operate directly on the oversampled PDM output of the digital microphones it is possible to reduce the latency of the system and minimize the hardware area.
This document presents an oscillator circuit and method. The oscillator circuit has a crystal to generate an oscillating voltage signal, a load capacitor coupled to the crystal, a capacitive element, and a switching circuit. The switching circuit alternately connects the capacitive element to the load capacitor and disconnects the capacitive element from the load capacitor. The presented oscillator circuit shows the advantages of a lower power consumption and a smaller circuit area.
H03B 5/36 - Production d'oscillation au moyen d'un amplificateur comportant un circuit de réaction entre sa sortie et son entrée l'élément déterminant la fréquence étant un résonateur électromécanique un résonateur piézo-électrique l'élément actif de l'amplificateur comportant un dispositif semi-conducteur
The present document relates to oscillator circuits and a method. An oscillator circuit generates an oscillating voltage signal, wherein the crystal has a first electrode and a second electrode. The oscillator circuit has a power source with a supply terminal and a reference terminal. The oscillator circuit has a switching circuit arranged between the power source and the crystal. The switching circuit, in a start-up phase, alternately connects the supply terminal of the power source to the first and second electrode of the crystal such that an amplitude of the oscillating voltage signal is increased.
H03B 5/36 - Production d'oscillation au moyen d'un amplificateur comportant un circuit de réaction entre sa sortie et son entrée l'élément déterminant la fréquence étant un résonateur électromécanique un résonateur piézo-électrique l'élément actif de l'amplificateur comportant un dispositif semi-conducteur
A digital filter and a method for filtering a pulse density modulation (PDM) signal are presented. The digital filter has a first filter circuit to receive an input signal with input values at successive time steps to provide a filtered input signal with filtered values at successive time steps. The digital filter does not require sample-rate or data format conversions. Also, the digital filter is area and power efficient when implemented in hardware. Optionally, the digital filter has a sigma-delta modulator including the quantiser, the sigma-delta modulator being used to receive the filtered input signal and to process the filtered input signal before and/or after being quantised by the quantiser. This digital filter does not require sample-rate or data format conversions. This digital filter is area and power efficient when implemented in hardware.
The present document relates to a Viterbi-based GFSK (Gaussian frequency-shift keying) demodulator that supports different modulation index ranges. In particular, the present document relates to a circuit and a corresponding method for demodulating a base band signal. For example, the base band signal may have an in-phase component and a quadrature component. The method includes determining a phase-modulated signal based on the base band signal. The method includes determining a scaled phase signal by scaling the phase-modulated signal using a scaling factor. The method includes determining discrimination signals based on the scaled phase signal using a periodic discrimination function. The method includes applying a Viterbi algorithm to the discrimination signals for determining an output signal.
A method for a device for determining the location of a mobile transmitting device using a two phase time difference of arrival method and to a system using such a device are presented. There is a first radio node for calculating a location of a third radio node, for receiving, from the third radio node, a first ranging signal and for calculating, based on the first ranging signal, a first ranging parameter. The first radio node receives, from a second radio node, a second ranging signal, transmits to the second radio node a third ranging signal, calculates a phase offset between the first and second radio nodes based on the second and third ranging signals, and calculates a distance between the first and third radio nodes based on the phase offset between the first and second radio nodes based on the first ranging parameter.
G01S 5/14 - Localisation par coordination de plusieurs déterminations de direction ou de ligne de positionLocalisation par coordination de plusieurs déterminations de distance utilisant les ondes radioélectriques déterminant des distances absolues à partir de plusieurs points espacés d'emplacement connu
G01S 5/02 - Localisation par coordination de plusieurs déterminations de direction ou de ligne de positionLocalisation par coordination de plusieurs déterminations de distance utilisant les ondes radioélectriques
G01S 5/12 - Localisation par coordination de plusieurs déterminations de direction ou de ligne de positionLocalisation par coordination de plusieurs déterminations de distance utilisant les ondes radioélectriques en coordonnant des lignes de position de formes différentes, p. ex. hyperboliques, circulaires, elliptiques ou radiales
H04W 64/00 - Localisation d'utilisateurs ou de terminaux pour la gestion du réseau, p. ex. gestion de la mobilité
A signal generator and a method which provides a source signal with a coherent phase at arbitrary times is presented. There is provided a signal generator for generating a source signal based on a reference signal. The signal generator has a phase setting circuit with a memory circuit operable between a plurality of states. The memory circuit has a phase setting input adapted to receive a phase setting value to set the memory circuit to a known state. The signal generator is adapted to load the phase setting value at a specific time to control a phase of the source signal.
H03L 7/00 - Commande automatique de fréquence ou de phaseSynchronisation
H03L 7/093 - Détails de la boucle verrouillée en phase concernant principalement l'agencement de détection de phase ou de fréquence, y compris le filtrage ou l'amplification de son signal de sortie utilisant des caractéristiques de filtrage ou d'amplification particulières dans la boucle
H03L 7/095 - Détails de la boucle verrouillée en phase concernant principalement l'agencement de détection de phase ou de fréquence, y compris le filtrage ou l'amplification de son signal de sortie utilisant un détecteur de verrouillage
H03L 7/099 - Détails de la boucle verrouillée en phase concernant principalement l'oscillateur commandé de la boucle
H03K 5/15 - Dispositions dans lesquelles des impulsions sont délivrées à plusieurs sorties à des instants différents, c.-à-d. distributeurs d'impulsions
A low power signal generator and a method for generating at least one source signal based on a reference signal having a reference frequency is presented. The signal generator has a divider circuit having a resonant frequency. The generator has an adjuster adapted to adjust the resonant frequency. The divider circuit has an input to receive the reference signal and an output for providing the source signal. The divider circuit is adapted to divide the reference frequency of the reference signal by a coefficient, such that the source signal has a source frequency that is less than the reference frequency.
A quantizer and a method for a sigma-delta modulator circuit that may be used as a component within an adaptive-noise cancelling headphone are presented. An apparatus includes a quantizer to receive an input signal with successive input values and quantizes the input signal at discrete intervals. This is done by mapping the input value of the input signal at each interval to one of a plurality of quantization levels with three or more quantization levels that are non-uniformly spaced. The plurality of quantization levels has a first portion with two or more quantization levels having the same sign and being proportional to a first fraction having one as its numerator and two to a power of a first variable as its denominator, the first variable being an integer and having a different value for each of the two or more quantization levels of the first portion.
H03M 3/00 - Conversion de valeurs analogiques en, ou à partir d'une modulation différentielle
G10K 11/178 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets d'interférenceMasquage du son par régénération électro-acoustique en opposition de phase des ondes acoustiques originales
A method of communication in a Bluetooth Low Energy network is presented. The network has a master device and a plurality of slave devices between a first slave device and a second slave device. The method steps include: sending from the master device to the first slave device a synchronisation delay parameter; and sending from the master device to the second slave device the synchronisation delay parameter and a relative offset parameter. At the second slave device, the method steps include determining a synchronisation time point by adding the relative offset parameter to the synchronisation delay parameter. At the synchronisation time point, the method steps include waking the first and second slave devices and sending a communication from the first slave device to the second slave device.
A voltage regulator and a method for generating a retention voltage for a RAM cell that is sufficiently high to prevent data loss, while minimizing leakage currents are presented. The A voltage regulator is used for generating at least one voltage. The regulator contains mirror circuitry, a leakage device coupled to the mirror circuitry, and a first resistive device coupled to the mirror circuitry via a first output node. The mirror circuitry mirrors a leakage current from the leakage device to the first resistive device, and the leakage current contributes to the generation of a first reference voltage at the first output node.
G11C 11/412 - Mémoires numériques caractérisées par l'utilisation d'éléments d'emmagasinage électriques ou magnétiques particuliersÉléments d'emmagasinage correspondants utilisant des éléments électriques utilisant des dispositifs à semi-conducteurs utilisant des transistors formant des cellules avec réaction positive, c.-à-d. des cellules ne nécessitant pas de rafraîchissement ou de régénération de la charge, p. ex. multivibrateur bistable, déclencheur de Schmitt utilisant uniquement des transistors à effet de champ
G11C 5/00 - Détails de mémoires couverts par le groupe
G05F 1/59 - Régulation de la tension ou de l'intensité là où la variable effectivement régulée par le dispositif de réglage final est du type continu utilisant des dispositifs à semi-conducteurs en série avec la charge comme dispositifs de réglage final comprenant plusieurs dispositifs à semi-conducteurs comme dispositifs de réglage final pour une charge unique
A digital filter and a method for filtering a pulse density modulation (PDM) signal are presented. The digital filter has a first filter circuit to receive an input signal with input values at successive time steps to provide a filtered input signal with filtered values at successive time steps. The digital filter does not require sample-rate or data format conversions. Also, the digital filter is area and power efficient when implemented in hardware. Optionally, the digital filter has a sigma-delta modulator including the quantiser, the sigma-delta modulator being used to receive the filtered input signal and to process the filtered input signal before and/or after being quantised by the quantiser. This digital filter does not require sample-rate or data format conversions. This digital filter is area and power efficient when implemented in hardware.
A frequency divider unit to receive an oscillating signal and to update, at an output of the frequency divider unit, a frequency-divided oscillating signal is presented. The frequency divider unit has a first clocked signal inverter to update, clocked based on the oscillating signal, a first intermediate signal at an output of the first clocked signal inverter. The frequency divider unit has a second clocked signal inverter, wherein the output of the first clocked signal inverter may be connected to an input of the second clocked signal inverter, and wherein the second clocked signal inverter updates, clocked based on the oscillating signal, a second intermediate signal at an output of the second clocked signal inverter. The frequency divider unit has a continuously operating signal inverter coupled between the output of the second clocked signal inverter and the input of the first clocked signal inverter.
H03K 23/66 - Compteurs d'impulsions comportant des chaînes de comptageDiviseurs de fréquence comportant des chaînes de comptage avec une base ou racine différente d'une puissance de deux avec une base de comptage variable, p. ex. par pré-réglage ou par addition ou suppression d'impulsions
An anti-noise signal generator and a method of generating an anti-noise signal are presented. The anti-noise generator includes a first microphone input to receive a first sigma-delta modulated signal at a microphone sampling frequency. The first microphone input is coupled to a combiner via a first path and a second path. The combiner is adapted to combine a first filtered signal from the first path and a second filtered signal from the second path to generate the anti-noise signal. The first path includes a first digital filter adapted to operate at a filter frequency equal or greater than the microphone sampling frequency. The second path includes a second digital filter. The first digital filter may be a sigma-delta based filter that includes a sigma-delta modulator.
G10K 11/178 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets d'interférenceMasquage du son par régénération électro-acoustique en opposition de phase des ondes acoustiques originales
A signal processor and a method for processing an input signal are presented. The signal processor is adapted to clip an oversampled input signal without introducing noise in the frequency band of interest. For instance, the signal processor may be used for clipping an acoustic signal. The signal processor includes a summer coupled to a limiter and to a feedback circuit. The summer is adapted to sum the input signal with at least one feedback signal to provide an adjusted signal. The limiter is adapted to compare the adjusted signal with a first threshold value and a second threshold value to provide a limited signal. The feedback circuit is adapted to calculate a difference between the limited signal and the adjusted signal, and to generate at least one feedback signal based on the difference.
A fast start-up oscillator circuit to reduce a start-up time of a crystal oscillator is presented. The circuit contains a crystal resonator to output a first oscillation signal and a tunable RC oscillator to output a second oscillation signal. A driver is coupled between the tunable RC oscillator and the crystal resonator The driver transfers the second oscillation signal output from the tunable RC oscillator to the crystal resonator. The driver drives the crystal resonator, and a feedback circuit connected between the crystal resonator and the tunable RC oscillator to align a phase of the tunable RC oscillator with a phase of the crystal resonator based on the oscillation signal output by the crystal resonator.
A sigma-delta modulator and method for converting an input voltage such as an analog signal into a digital signal is presented. The modulator may be used as an analog-to-digital converter (ADC). The modulator has a plurality of bias transistors with at least one p-type transistor and at least one n-type transistor. The modulator receives a bias voltage, wherein each bias transistor receives the same bias voltage. This sigma-delta modulator results in reduced power consumption.
There is provided a signal generator and associated method for generating a source signal. The signal generator includes a frequency generator for providing an oscillating signal, a phase comparator, a first phase modulator, a second phase modulator and a phase shifter. The phase comparator is adapted to compare a phase signal with a feedback signal and to generate an error signal to control the phase of the oscillating signal. The first and second phase modulators are adapted to provide a first phase control word and a second phase control word respectively. The phase shifter is adapted to modulate the oscillating signal based on the second phase control word to generate the source signal. The source signal comprises the feedback signal.
H03L 7/093 - Détails de la boucle verrouillée en phase concernant principalement l'agencement de détection de phase ou de fréquence, y compris le filtrage ou l'amplification de son signal de sortie utilisant des caractéristiques de filtrage ou d'amplification particulières dans la boucle
H04L 27/20 - Circuits de modulationCircuits émetteurs
Methods, structures and computer program products for digital sample rate conversion are presented. An input digital sample with a first frequency is converted to an output sample with a second frequency. A sample rate conversion circuit is provided which provides an enhanced transposed farrow structure that enables an optimised trade-off between noise levels and computational complexity. Each output sample is derived by convolution of a continuous time interpolation kernel with a continuous time step function representing the input sample stream. In a sample rate conversion structure, there is a trade-off between the quality and the computational complexity. The quality is defined as a ratio between the (wanted) signal power and the (unwanted) noise power. The computational complexity may be defined as the average number of arithmetic operations that are required to generate one output sample. A higher computational complexity will generally lead to a higher power consumption and larger footprint.
G06F 17/17 - Évaluation de fonctions par des procédés d'approximation, p. ex. par interpolation ou extrapolation, par lissage ou par le procédé des moindres carrés
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
H04B 1/00 - Détails des systèmes de transmission, non couverts par l'un des groupes Détails des systèmes de transmission non caractérisés par le milieu utilisé pour la transmission
G06F 7/78 - Dispositions pour le réagencement, la permutation ou la sélection de données selon des règles prédéterminées, indépendamment du contenu des données pour changer l'ordre du flux des données, p. ex. transposition matricielle ou tampons du type pile d'assiettes [LIFO]Gestion des occurrences du dépassement de la capacité du système ou de sa sous-alimentation à cet effet
A bias generator and a method for generating a bias voltage are presented. The bias generator is for use with an electronic circuit comprising a first switch coupled in series with a second switch. The bias generator is adapted to generate a reference voltage, a first bias voltage, and a second bias voltage. The second bias voltage is based on the reference voltage. After applying the first voltage to the first switch and the second voltage to the second switch, the bias generator controls a voltage across the first switch. The bias generator may be adapted to set a value of the reference voltage to control the voltage across the first switch. For instance, the reference voltage may be set to a fix value so that the voltage across the first switch is maintained at a constant value.
An inductor arrangement has a first inductor structure having one or more inductors at least partially on a first layer and a second inductor structure having one or more inductors at least partially on a second layer. The inductors are arranged such that currents induced by an external magnetic field are substantially cancelled in at least one of the first inductor structure and the second inductor structure. The, or each, inductor of the second inductor structure overlaps, at least partially, the, or each, inductor of the first inductor structure. An oscillator circuit having an inductor arrangement is also presented.
H01F 27/34 - Moyens particuliers pour éviter ou réduire les effets électriques ou magnétiques indésirables, p. ex. pertes à vide, courants réactifs, harmoniques, oscillations, champs de fuite
H03B 5/12 - Éléments déterminant la fréquence comportant des inductances ou des capacités localisées l'élément actif de l'amplificateur étant un dispositif à semi-conducteurs
47.
Switch-mode power amplifier for an RF transmitter employing digitally-controlled OOB harmonic attenuation techniques
The present document describes a digital power amplifier configured to provide an amplified output signal at an output port based on an input signal. The power amplifier comprises a drive unit configured to generate a high side drive signal comprising a sequence of pulses for controlling the high side switch and a low side drive signal comprising a sequence of pulses for controlling the low side switch, respectively. The drive signals are generated such that the pulses of the high side drive signal are non-overlapping with regards to the pulses of the low side drive signal, and such that the sequence of pulses of the high side drive signal and the sequence of pulses of the low side drive signal have a reduced fraction of energy from higher order harmonics compared to a sequence of rectangular shaped pulses.
H03F 1/04 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire dans les amplificateurs à tubes à décharge
H03F 1/02 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire
H03F 3/24 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C d'étages transmetteurs de sortie
H03F 3/193 - Amplificateurs à haute fréquence, p. ex. amplificateurs radiofréquence comportant uniquement des dispositifs à semi-conducteurs comportant des dispositifs à effet de champ
H03F 1/56 - Modifications des impédances d'entrée ou de sortie, non prévues ailleurs
A method to fabricate a land grid array wafer level chip scale package is described. A silicon die is provided. A dielectric layer is deposited on the silicon die. An opening is etched through the dielectric layer to a metal pad on the silicon die. At least one redistribution layer is formed over the dielectric layer and contacting the metal pad. At least one copper post is formed on the at least one redistribution layer and forms a land grid array. The wafer is sawed partially through on scribe lines to form cuts exposing sides of the silicon die. Thereafter, a molding compound is applied over the at least one redistribution layer and in the cuts wherein the molding compound encapsulates top and side surfaces of the silicon die.
A power combiner for an outphasing amplifier system comprises an output terminal, a first input terminal, a first inductor, and a first capacitor, wherein the first input terminal is connected to ground via the first inductor and the first input terminal is connected to the output terminal via the first capacitor. The power combiner further comprises a second input terminal, a second capacitor, and a second inductor, wherein the second input terminal is connected to ground via the second capacitor and the second input terminal is connected to the output terminal via the second inductor. The first capacitor can have a same capacitance as the second capacitor and the first inductor has a same inductance as the second inductor.
H03F 3/21 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C comportant uniquement des dispositifs à semi-conducteurs
H03F 3/00 - Amplificateurs comportant comme éléments d'amplification uniquement des tubes à décharge ou uniquement des dispositifs à semi-conducteurs
H03F 1/56 - Modifications des impédances d'entrée ou de sortie, non prévues ailleurs
H03F 1/02 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire
A low power microcontroller that includes a low power node controller adapted to retrieve data from peripheral devices is presented. The microcontroller contains a state machine coupled to a storage medium, which is adapted to store a set of instructions executable by the state machine. The microcontroller also contains a power domain controller, which is adapted to enable the state machine upon receipt of a notification signal. As an option, the microcontroller contains a plurality of communication controllers for communicating with a plurality of external devices, wherein the power domain controller includes a register which may be read by the state machine to identify a communication controller among the plurality controllers. Also, a method of operating a microcontroller for use with an external device is presented. The method provides a state machine which executes a set of instructions.
A divider circuit and method for generating one or more digital signals is presented. The circuit has a first output section for generating a first digital signal. There is a first output section with an output node to output the first digital signal, and a plurality of switches with one or more control switches. The plurality of switches selectively couple the output node to a first voltage and/or to selectively couple the output node to a second voltage, thereby generating the first digital signal. The or each control switch is prevents at least one of (i) the output node being coupled to the first and second voltages simultaneously and (ii) the output node being decoupled from both the first and second voltages simultaneously.
H03K 23/52 - Signaux d'ouverture de porte ou d'horloge appliqués à tous les étages, c.-à-d. compteurs synchrones utilisant des circuits de déclenchement bistables à réaction utilisant des transistors à effet de champ
A digital active diode circuit for letting current pass in one direction and substantially blocking current in the opposite direction is presented. The circuit contains switching means comprising an array of switches, a first comparison unit coupled to the digital active diode circuit input and output. The first comparison unit updates its output if the difference between their inputs is higher than a first threshold voltage, and a second comparison unit being coupled to the digital active diode circuit output and input. The second comparison unit updates its output if the difference between its inputs is lower than a second threshold voltage. The switching means switches on or off at least one switch based on the comparisons performed by the first comparison unit and the second comparison unit and wherein the first threshold voltage is different from the second threshold voltage.
H03K 17/06 - Modifications pour assurer un état complètement conducteur
H03K 17/687 - Commutation ou ouverture de porte électronique, c.-à-d. par d'autres moyens que la fermeture et l'ouverture de contacts caractérisée par l'utilisation de composants spécifiés par l'utilisation, comme éléments actifs, de dispositifs à semi-conducteurs les dispositifs étant des transistors à effet de champ
H03K 17/30 - Modifications pour fournir un seuil prédéterminé avant commutation
Methods and devices for distance measuring/ranging, as well as location measurements both in 2D and 3D are presented. More specifically, the methods and devices are for determining the time of arrival of a radio frequency signal. A method of determining a time of arrival of a radio frequency signal in a receiving device as received from a transmitting device includes receiving a radio frequency signal, determining a first phase. The first phase is defined as a phase of the received radio frequency signal. The method also includes obtaining a second phase. The second phase is defined as a phase of a reference radio frequency signal. The method also includes determining the time of arrival of the radio frequency signal based on comparing the first and second phases.
G01S 5/02 - Localisation par coordination de plusieurs déterminations de direction ou de ligne de positionLocalisation par coordination de plusieurs déterminations de distance utilisant les ondes radioélectriques
H04W 4/029 - Services de gestion ou de suivi basés sur la localisation
G01S 5/10 - Position du récepteur obtenue par coordination de plusieurs lignes de position définies par des mesures de différence de parcours
G01S 11/02 - Systèmes pour déterminer la distance ou la vitesse sans utiliser la réflexion ou la reradiation utilisant les ondes radioélectriques
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
54.
Radio frequency input/output for radio transceivers
A radio frequency input/output circuit with a composite inductor structure is presented. The composite inductor structure has a plurality of inductors that are interwound. The composite inductor structure is implemented on a chip. The plurality of inductors are magnetically coupled. The plurality of inductors are interwound around a core. A second inductor is coupled in series with a first inductor and the first inductor is coupled in series with the third inductor. The first inductor and the third inductor are coupled at a centre tap, such that the first inductor and the third inductor form a centre-tapped coil. The centre tap is coupled to an input terminal.
H04B 1/38 - Émetteurs-récepteurs, c.-à-d. dispositifs dans lesquels l'émetteur et le récepteur forment un ensemble structural et dans lesquels au moins une partie est utilisée pour des fonctions d'émission et de réception
H04B 1/525 - Dispositions hybrides, c.-à-d. dispositions pour la transition d’une transmission bilatérale sur une voie à une transmission unidirectionnelle sur chacune des deux voies ou vice versa avec des moyens de réduction de la fuite du signal de l’émetteur vers le récepteur
55.
Apparatus and method for monitoring a physiological parameter
An apparatus for monitoring a physiological parameter over a plurality of measurement periods is presented. The apparatus includes a circuit coupled to a light emitter and to a light receiver. The circuit is adapted to drive the light emitter with a constant first charge over the plurality of measurement periods. Also presented is a wearable device provided with an apparatus for monitoring a physiological parameter over a plurality of measurement periods. Also presented is a method for monitoring a physiological parameter over a plurality of measurement periods, the steps include providing a light emitter and a light receiver and driving the light emitter with a constant first charge over the plurality of measurement periods.
A method of establishing a low latency connection between a first device and a second device on a wireless network is presented. The method contains the steps of: forming a first wireless connection between the first and second devices; forming at least a second and parallel wireless connection between the first and second devices; and sending data between the first and second devices using at least the first and second connections. For any wireless protocol for data exchange between devices that specifies a minimum interval between data exchange events, the present disclosure enables a lower latency than would otherwise be achievable according to a standard protocol.
H04W 4/80 - Services utilisant la communication de courte portée, p. ex. la communication en champ proche, l'identification par radiofréquence ou la communication à faible consommation d’énergie
H04W 76/15 - Établissement de connexions à liens multiples sans fil
H04L 29/12 - Dispositions, appareils, circuits ou systèmes non couverts par un seul des groupes caractérisés par le terminal de données
A method of synchronizing the clocks of a master device and at least a first slave device which are connected on a wireless network. The method includes sending a scan command from the master device to at least the first slave device, setting the master device to a broadcast mode and broadcasting data, the broadcast data comprising a first time stamp; scanning the broadcasting data at at least the first slave device and resetting the clock of the first slave device using the first time stamp. In particular, but not exclusively, the present disclosure relates to synchronizing the clocks of two devices which are connected on a Bluetooth Low Energy (BLE) wireless network.
H04W 4/80 - Services utilisant la communication de courte portée, p. ex. la communication en champ proche, l'identification par radiofréquence ou la communication à faible consommation d’énergie
H04L 12/24 - Dispositions pour la maintenance ou la gestion
H04L 12/721 - Procédures de routage, p.ex. routage par le chemin le plus court, routage par la source, routage à état de lien ou routage par vecteur de distance
H04W 40/24 - Gestion d'informations sur la connectabilité, p. ex. exploration de connectabilité ou mise à jour de connectabilité
Methods, structures and computer program products for digital sample rate conversion are presented. An input digital sample with a first frequency is converted to an output sample with a second frequency. A sample rate conversion circuit is provided which provides an enhanced transposed farrow structure that enables an optimised trade-off between noise levels and computational complexity. Each output sample is derived by convolution of a continuous time interpolation kernel with a continuous time step function representing the input sample stream. In a sample rate conversion structure, there is a trade-off between the quality and the computational complexity. The quality is defined as a ratio between the (wanted) signal power and the (unwanted) noise power. The computational complexity may be defined as the average number of arithmetic operations that are required to generate one output sample. A higher computational complexity will generally lead to a higher power consumption and larger footprint.
G06F 17/17 - Évaluation de fonctions par des procédés d'approximation, p. ex. par interpolation ou extrapolation, par lissage ou par le procédé des moindres carrés
G06F 7/78 - Dispositions pour le réagencement, la permutation ou la sélection de données selon des règles prédéterminées, indépendamment du contenu des données pour changer l'ordre du flux des données, p. ex. transposition matricielle ou tampons du type pile d'assiettes [LIFO]Gestion des occurrences du dépassement de la capacité du système ou de sa sous-alimentation à cet effet
H04L 29/06 - Commande de la communication; Traitement de la communication caractérisés par un protocole
H04B 1/00 - Détails des systèmes de transmission, non couverts par l'un des groupes Détails des systèmes de transmission non caractérisés par le milieu utilisé pour la transmission
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
59.
Determining the distance between devices in a wireless data exchange protocol
A method of determining a distance between a first and a second device in a wireless data exchange protocol is presented. The method includes sending an advertising channel Protocol Data Unit (PDU) from the first device; receiving the advertising channel PDU at the second device and responsively sending a scan request scanning PDU from the second device to the first device; receiving the scan request scanning PDU at the first device and responsively sending a scan response scanning PDU from the first device to the second device; calculating a time of flight (TOF) for at least one of the sent PDUs; and determining the distance between the first and second devices using the calculated TOF.
H04W 4/80 - Services utilisant la communication de courte portée, p. ex. la communication en champ proche, l'identification par radiofréquence ou la communication à faible consommation d’énergie
H04W 12/00 - Dispositions de sécuritéAuthentificationProtection de la confidentialité ou de l'anonymat
H04W 84/18 - Réseaux auto-organisés, p. ex. réseaux ad hoc ou réseaux de détection
H04L 29/06 - Commande de la communication; Traitement de la communication caractérisés par un protocole
60.
Security improvements in a wireless data exchange protocol
A security solution for BLUETOOTH Low Energy (BLE) or equivalent wireless data exchange protocols involves authentication of a peripheral device by a central device using the advertising channel is presented. A method of authenticating a peripheral device in a wireless data exchange has a peripheral device sending an advertising channel Protocol Data Unit (PDU), a central device receiving the advertising channel PDU and the central device sending a scan request scanning PDU to the peripheral device. The advantage of this method of using discovery protocol enables a software based solution for the monitoring device and a hardware with software based solution on the beacon device.
H04L 29/06 - Commande de la communication; Traitement de la communication caractérisés par un protocole
G06F 13/10 - Commande par programme pour dispositifs périphériques
H04L 9/32 - Dispositions pour les communications secrètes ou protégéesProtocoles réseaux de sécurité comprenant des moyens pour vérifier l'identité ou l'autorisation d'un utilisateur du système
H04W 4/80 - Services utilisant la communication de courte portée, p. ex. la communication en champ proche, l'identification par radiofréquence ou la communication à faible consommation d’énergie
A method of data calibration, and in particular sensor calibration, which involves gathering an initial first estimate and then binning the data samples, so that calibration can be performed without the need for a known reference stimulus. The present disclosure relates to calibration of vectors in a measurement system, and in particular to calibration of a correction function for systematic errors in successive data vectors. There is provided a method of determining a vector calibration function comprising: binning successive data vectors; and optimising the binned data vectors once data vectors allocated to a minimum number of unique bins have been observed. The method comprises establishing an initial calibration estimate and where the binning and optimising are performed based on said initial calibration estimate.
A computer system, especially but not exclusively an embedded system, is provided with a CPU and an external FLASH or other memory which is used for storing code to be executed by the CPU in operation of the system. The system can be initialized without requiring a secondary boot sequence which means it can be used in preference to embedded or serial FLASH solutions. There is provided a computer system comprising: a processor; an external memory, being external to the processor; a memory controller for the external memory; and a power management unit which is arranged to receive a wake up signal, then to first wake up the memory controller; and secondly at a later time to wake up the processor.
G06F 1/3287 - Économie d’énergie caractérisée par l'action entreprise par la mise hors tension d’une unité fonctionnelle individuelle dans un ordinateur
A circuit for controlling a power supply is disclosed. The circuit has a storage element for storing energy harvested from energy sources, a backup battery, and a comparator to compare a voltage of the storage element to a reference voltage. The circuit also contains a first switch for selectively connecting the storage element to an output. A second switch connects the backup battery to the output. A switch control circuit controls the first switch to disconnect the storage element from the output and the second switch to connect the backup battery to the output, if the voltage of the storage element is below the reference voltage. The backup battery is disconnected from the output while the voltage of the storage element is below the reference voltage. The control circuit controls the second switch to disconnect the battery from the output while the voltage of the storage element is below the reference.
H02J 3/14 - Circuits pour réseaux principaux ou de distribution, à courant alternatif pour règler la tension dans des réseaux à courant alternatif par changement d'une caractéristique de la charge du réseau par interruption, ou mise en circuit, des charges du réseau, p. ex. charge équilibrée progressivement
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
H02J 7/34 - Fonctionnement en parallèle, dans des réseaux, de batteries avec d'autres sources à courant continu, p. ex. batterie tampon
H02J 7/35 - Fonctionnement en parallèle, dans des réseaux, de batteries avec d'autres sources à courant continu, p. ex. batterie tampon avec des cellules sensibles à la lumière
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
A charge pump circuit suitable for low input voltages is presented. The charge pump circuit has a first clock signal generator, a second clock signal generator, and n voltage doubler circuits. The voltage doubler has an input, an output, a first capacitor connected to the first clock signal generator, a second capacitor connected to the second clock signal generator, a first NMOST having the source connected to the input and the drain connected to the first capacitor, a second NMOST having the connected to the source of the first NMOST and the drain connected to second capacitor, a first PMOST having the drain connected to the first capacitor and the source connected to the output, a second PMOST having the source connected to the source of the first PMOST and the drain connected to the second capacitor.
H02M 3/07 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des résistances ou des capacités, p. ex. diviseur de tension utilisant des capacités chargées et déchargées alternativement par des dispositifs à semi-conducteurs avec électrode de commande
An electronic circuit is disclosed for dividing the frequency of a periodic signal, wherein at least one of the memory elements is arranged with its output terminal connected to the input terminal of another memory element wherein the electronic circuit is configured to generate an output signal having a smaller fundamental frequency than the clock signal at at least one of the output terminals. Each memory element is configured to change and hold a voltage at the output terminal based on a voltage at the input terminal at times controlled by a clock signal received at the clock terminal. At least two of the memory elements are stacked in the sense that the bottom terminal of a first memory element is connected to the top terminal of a second memory element to enable the charge to flow from the first memory element to the second memory element.
G11C 7/22 - Circuits de synchronisation ou d'horloge pour la lecture-écriture [R-W]Générateurs ou gestion de signaux de commande pour la lecture-écriture [R-W]
G11C 5/02 - Disposition d'éléments d'emmagasinage, p. ex. sous la forme d'une matrice
G11C 5/06 - Dispositions pour interconnecter électriquement des éléments d'emmagasinage
G11C 7/10 - Dispositions d'interface d'entrée/sortie [E/S, I/O] de données, p. ex. circuits de commande E/S de données, mémoires tampon de données E/S
A patching system and a patching circuit provide a type of patching entry which can replace several sequential memory positions with hardcoded and dynamically configured assembly instructions, thus injecting a small piece of code. The operation of the injected code can be for any purpose, but as an example may be used to seamlessly redirect the execution flow of a processing unit.
An infrared signal generator with an interface for receiving an encoded infrared command; and protocol generation circuitry for generating a bitstream that comprises one or more data words that comprise data to be transmitted and one or more protocol words that describe symbols of an infrared protocol is presented. Optionally, the protocol generation circuitry comprises a first circuit for generating a data word and a second circuit for generating a protocol word. Optionally, the infrared signal generator comprises a carrier frequency generator which is selectively combined with the output of either the first circuit or the second circuit to provide a drive signal for an infrared transmitter.
H04B 10/00 - Systèmes de transmission utilisant des ondes électromagnétiques autres que les ondes hertziennes, p. ex. les infrarouges, la lumière visible ou ultraviolette, ou utilisant des radiations corpusculaires, p. ex. les communications quantiques
G08C 23/04 - Systèmes de transmission de signaux non électriques, p. ex. systèmes optiques utilisant des ondes lumineuses, p. ex. infrarouges
An oscillator circuit with an oscillator stage and a first current source arranged to drive the oscillator stage is presented. The oscillator stage has an oscillator stage input terminal, an oscillator stage output terminal, an oscillator arranged to provide an oscillating signal between the oscillator stage input terminal and the oscillator stage output terminal. The oscillator circuit has an operational amplifier with an inverting input, a non-inverting input and an operational amplifier output. The oscillator stage input terminal and the oscillator stage output terminal are coupled to the inverting input and non-inverting input. The operational amplifier output is coupled to the oscillator stage input terminal such that the oscillator stage input terminal and the oscillator stage output terminal are controlled to have a same DC voltage level.
H03B 5/32 - Production d'oscillation au moyen d'un amplificateur comportant un circuit de réaction entre sa sortie et son entrée l'élément déterminant la fréquence étant un résonateur électromécanique un résonateur piézo-électrique
H03B 5/36 - Production d'oscillation au moyen d'un amplificateur comportant un circuit de réaction entre sa sortie et son entrée l'élément déterminant la fréquence étant un résonateur électromécanique un résonateur piézo-électrique l'élément actif de l'amplificateur comportant un dispositif semi-conducteur
H03K 19/0175 - Dispositions pour le couplageDispositions pour l'interface
H03B 5/12 - Éléments déterminant la fréquence comportant des inductances ou des capacités localisées l'élément actif de l'amplificateur étant un dispositif à semi-conducteurs
H03B 5/30 - Production d'oscillation au moyen d'un amplificateur comportant un circuit de réaction entre sa sortie et son entrée l'élément déterminant la fréquence étant un résonateur électromécanique
H03B 5/06 - Modifications du générateur pour assurer l'amorçage des oscillations
An optimised method for driving a loudspeaker is used for protecting the loudspeaker from damage due to excessive excursion or from overheating. The playback power of an incoming audio data stream is compared with a feedback power derived from the loudspeaker actuator and the comparison is used to adjust the frequency response of the loudspeaker, across individual sub bands.
An energy harvesting direct current to direct current ‘DC-to-DC’ converter circuit is presented. It is comprised of an energy storage element, an input configured to receive an input voltage, an output; switching means configured to perform cycles. Each cycle is marked when the input voltage reaches a reference voltage, switching the circuit such that the energy storage element enters into an energy charging state in which the energy storage element stores energy provided by the input voltage. Control means is configured to determine the reference voltage based on the number of cycles per time period performed by the circuit.
H01H 47/00 - Circuits autres que ceux appropriés à une application particulière du relais et prévue pour obtenir une caractéristique de fonctionnement donnée ou pour assurer un courant d'excitation donné
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
H02M 3/156 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p. ex. régulateurs à commutation
H02M 3/04 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques
An on-chip thermoelectric generator comprises an integrated circuit comprising a substrate and at least one thermocouple integrated with the substrate, wherein the thermocouple is configured to convert a temperature difference into a voltage. A metal bump or metal pillar is thermally connected to a portion of the thermocouple for generating the temperature difference. The metal bump or metal pillar is electrically insulated from said at least one thermocouple. The metal bump or metal pillar is electrically connected to a component of the integrated circuit which is different from the thermocouple.
H01L 35/30 - DISPOSITIFS À SEMI-CONDUCTEURS; DISPOSITIFS ÉLECTRIQUES À L'ÉTAT SOLIDE NON PRÉVUS AILLEURS - Détails fonctionnant exclusivement par effet Peltier ou effet Seebeck caractérisés par les moyens d'échange de chaleur à la jonction
H01L 35/32 - DISPOSITIFS À SEMI-CONDUCTEURS; DISPOSITIFS ÉLECTRIQUES À L'ÉTAT SOLIDE NON PRÉVUS AILLEURS - Détails fonctionnant exclusivement par effet Peltier ou effet Seebeck caractérisés par la structure ou la configuration de la cellule ou du thermocouple constituant le dispositif
H01L 27/16 - Dispositifs consistant en une pluralité de composants semi-conducteurs ou d'autres composants à l'état solide formés dans ou sur un substrat commun comprenant des composants thermomagnétiques
A device for true random number generation is disclosed. The device comprises an antenna and an analog processing unit for analog processing of a signal received from the antenna. An analog to digital (AD) converter is used for converting an analog signal generated by the analog processing unit into a digital signal. An isolation means is applied for temporarily isolating the antenna from the analog processing unit and the AD converter to generate a noise signal. A sampling means is used for sampling output values generated by the AD converter when the antenna is isolated from the analog processing unit and the AD converter. A digital processing unit is used for processing the sampled output values generated by the AD converter. The digital processing unit is configured to generate a random number based on one or more of the output values generated by the AD converter.
An impedance detector for measuring an impedance of a circuit comprises a frequency source, a resistor connected in between the frequency source and the circuit to be measured, a phase shift circuit for applying a phase shift to a signal from the frequency source, a first multiplier for mixing the signal from the frequency source with a signal from the circuit to be measured, a second multiplier for mixing the phase shifted signal with the signal from the circuit to be measured, and a processing circuit for determining an indication of an impedance of the circuit to be measured in dependence on the first mixed signal and the second mixed signal.
G01R 27/02 - Mesure de résistances, de réactances, d'impédances réelles ou complexes, ou autres caractéristiques bipolaires qui en dérivent, p. ex. constante de temps
H03H 7/40 - Adaptation automatique de l'impédance de charge à l'impédance de la source
74.
Maintaining the resistor divider ratio during start-up
Circuits and methods to maintain a resistive voltage divider ratio during start-up of an electronic circuit comprising a feed-forward capacitor across a feedback resistor using a dynamic start-up circuit are disclosed as e.g. a LDO or an amplifier. In a preferred embodiment of the disclosure is applied to an LDO. Modification of the resistive voltage divider ratio caused by the feed-forward capacitor during start-up is prevented while the voltage level of a voltage access point of the voltage divider on the feed-forward capacitor is maintained. A start-up circuit comprises a start-up capacitor and a start-up comparator.
G05F 1/575 - Régulation de la tension ou de l'intensité là où la variable effectivement régulée par le dispositif de réglage final est du type continu utilisant des dispositifs à semi-conducteurs en série avec la charge comme dispositifs de réglage final caractérisé par le circuit de rétroaction
G05F 3/02 - Régulation de la tension ou du courant
H03G 1/00 - Détails des dispositions pour le réglage de l'amplification
H03F 3/04 - Amplificateurs comportant comme éléments d'amplification uniquement des tubes à décharge ou uniquement des dispositifs à semi-conducteurs comportant uniquement des dispositifs à semi-conducteurs
75.
Fast settling phase locked loop (PLL) with optimum spur reduction
A method for constructing a phase locked loop begins with determining spurious frequency component criteria permitted within the PLL. A PLL filter prototype is selected with a desired settling time. A transfer function is generated based on the PLL transfer function that predicts the spurious components. A maximum level of the spurious components produced in the PLL is determined based on the maximum frequency step. If the maximum level of the spurious frequency components produced is too large, the order variable is incremented and the PLL transfer function is determined until the transfer function produces the spurious frequency components that meet the requirements. The components for a loop filter are selected based on the selected PLL transfer function. The adjustable frequency source tuning gain, the phase detector gain, the loop filter gain, and the divide factor are chosen to meet the requirements of the PLL transfer function.
H03L 7/06 - Commande automatique de fréquence ou de phaseSynchronisation utilisant un signal de référence qui est appliqué à une boucle verrouillée en fréquence ou en phase
H03L 7/107 - Détails de la boucle verrouillée en phase pour assurer la synchronisation initiale ou pour élargir le domaine d'accrochage utilisant une fonction de transfert variable pour la boucle, p. ex. un filtre passe-bas ayant une largeur de bande variable
H03L 7/093 - Détails de la boucle verrouillée en phase concernant principalement l'agencement de détection de phase ou de fréquence, y compris le filtrage ou l'amplification de son signal de sortie utilisant des caractéristiques de filtrage ou d'amplification particulières dans la boucle
A method and system for improving echo suppression and/or duplexity of handsfree telephone applications is presented. An echo suppression unit for an electronic device comprising a loudspeaker and a microphone is described. The microphone is configured to capture a transmit signal, wherein the transmit signal comprises an echo of a receive signal rendered by the loudspeaker. The echo suppression unit is configured to determine, based on the receive signal, whether the receive signal comprises a first frequency component causing the echo of the receive signal to comprise a distortion component. The distortion component comprises one or more frequencies which are not comprised within the first frequency component. Furthermore, the echo suppression unit is configured to apply a post-filter to the transmit signal, if it is determined that the receive signal comprises the first frequency component. The post-filter is configured to selectively attenuate the distortion component.
H04B 3/20 - Réduction des effets d'échos ou de sifflementSystèmes à ligne de transmission Détails ouverture ou fermeture de la voie d'émissionCommande de la transmission dans une direction ou l'autre
H04R 3/02 - Circuits pour transducteurs pour empêcher la réaction acoustique
H04M 9/08 - Systèmes téléphoniques à haut-parleur à double sens comportant des moyens pour conditionner le signal, p. ex. pour supprimer les échos dans l'une ou les deux directions du trafic
H04B 15/00 - Suppression ou limitation du bruit ou des interférences
H04M 1/60 - Équipement de sous-station, p. ex. pour utilisation par l'abonné comprenant des amplificateurs de parole
An analog-digital converter circuit is disclosed. Voltage control means is configured to control a voltage. Comparing means is configured to send a resulting comparative signal to the voltage control means. A first DAC is connected to the comparing means and to the voltage control means. Switching means connects an input means to the comparing means during a sampling phase. A second DAC is connected to the comparing means and to the voltage control means. A switching means connects input to the second DAC during a sampling phase, and connects voltage control means to DAC during a conversion phase. Switching means connects a second input to comparing means during a sampling phase.
H03M 1/34 - Valeur analogique comparée à des valeurs de référence
H03M 1/46 - Valeur analogique comparée à des valeurs de référence uniquement séquentiellement, p. ex. du type à approximations successives avec convertisseur numérique/analogique pour fournir des valeurs de référence au convertisseur
An auto-calibrated current sensing comparator is provided. A secondary dynamic comparator shares the same inputs and acts to adjust a calibration control of the current sensing comparator. The calibration control may be in the form of adjusting the offset of the current sensing comparator or adjusting a propagation delay that is added to its output.
H02M 3/156 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p. ex. régulateurs à commutation
H03K 17/94 - Commutation ou ouverture de porte électronique, c.-à-d. par d'autres moyens que la fermeture et l'ouverture de contacts caractérisée par la manière dont sont produits les signaux de commande
H02M 3/157 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p. ex. régulateurs à commutation avec commande numérique
H02M 3/158 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p. ex. régulateurs à commutation comprenant plusieurs dispositifs à semi-conducteurs comme dispositifs de commande finale pour une charge unique
H02M 1/00 - Détails d'appareils pour transformation
79.
Electronic circuit for and method of executing an application program stored in a one-time-programmable (OTP) memory in a system on chip (SoC)
A method and apparatus for executing an application program stored in an one-time-programmable, OTP, memory in a system on chip (SoC) is described. The SoC has RAM, a CPU and an OTP controller. The OTP memory stores an application program. The method includes, by the processor unit at power-up, instructing the OTP controller to copy the application program from the OTP memory to RAM, executing the application program from RAM, and setting the system on chip (SoC) in sleep mode. By the OTP controller after a wake-up, copying the application program from the OTP memory to the RAM and after the copying, waking up the CPU and transferring control back to the CPU. By the CPU after being woken up by the OTP controller, executing the application program from RAM.
G06F 9/44 - Dispositions pour exécuter des programmes spécifiques
G06F 1/24 - Moyens pour la remise à l'état initial
G11C 17/16 - Mémoires mortes programmables une seule foisMémoires semi-permanentes, p. ex. cartes d'information pouvant être replacées à la main dans lesquelles le contenu est déterminé en établissant, en rompant ou en modifiant sélectivement les liaisons de connexion par une modification définitive de l'état des éléments de couplage, p. ex. mémoires PROM utilisant des liaisons électriquement fusibles
An electrically programmable load having an impedance value dependent on a received control word. The electrically programmable load has several parallel load units. Each load unit has one or more load unit element who receive a control word component of the control word and have a load unit element impedance value which depends on a control word component value of the control word component, where the control word component value is one of three or more different biasing values.
An electronic biasing circuit provides a DC bias voltage to a circuit to be biased. The biasing circuit has a first transistor and a second transistor. A gate of the first transistor is connected to a gate of the second transistor and supplies the DC bias voltage. A source of the first transistor is connected to a supply reference voltage. A source of the second transistor is connected to the supply reference voltage via a resistor element. The currents flowing through the first and second transistor are forced to be equal. A third transistor is connected in series with the first transistor and a fourth transistor is connected in series with the second transistor. Currents flowing through the third and fourth transistors are forced to be equal.
H03F 3/04 - Amplificateurs comportant comme éléments d'amplification uniquement des tubes à décharge ou uniquement des dispositifs à semi-conducteurs comportant uniquement des dispositifs à semi-conducteurs
H03F 3/16 - Amplificateurs comportant comme éléments d'amplification uniquement des tubes à décharge ou uniquement des dispositifs à semi-conducteurs comportant uniquement des dispositifs à semi-conducteurs avec dispositifs à effet de champ
G05F 3/24 - Régulation de la tension ou du courant là où la tension ou le courant sont continus utilisant des dispositifs non commandés à caractéristiques non linéaires consistant en des dispositifs à semi-conducteurs en utilisant des combinaisons diode-transistor dans lesquelles les transistors sont uniquement du type à effet de champ
H03F 1/22 - Modifications des amplificateurs pour réduire l'influence défavorable de l'impédance interne des éléments amplificateurs par utilisation de couplage dit "cascode", c.-à-d. étage avec cathode ou émetteur à la masse suivi d'un étage avec grille ou base à la masse respectivement
H03F 1/30 - Modifications des amplificateurs pour réduire l'influence des variations de la température ou de la tension d'alimentation
82.
Method for reducing overdrive need in MOS switching and logic circuit
The present disclosure relates to methods and circuits to lowering the signal range of switching or logic circuits below supply range. The circuits may have one or more stages. The supply levels can be set individually for each stage. This may realize amplifiers/attenuators, both digitally and analogically controlled, based on progression and/or modulation in the supply range from stage to stage. A chain of stages can provide the desired power gain by setting the supply progression according to the nature of the incoming signals. The signal levels are lowered by generic device networks comprising voltage sources providing voltages independent of currents flowing through. Decoupling the signal amplitude from DC biasing allows for the signal swing to be lower than threshold voltages of the active devices.
An amplifying circuit comprises an analog amplifying circuit having an analog input for receiving an analog input signal to be amplified and an analog output for outputting an amplified analog signal, wherein the amplifying circuit comprises an implementation of a complex transfer function. A feedback circuit has a feedback circuit input and a feedback circuit output, wherein the feedback circuit comprises an implementation of an inverse transfer function that is an estimation of an inverse of at least a DC component of the complex transfer function of the analog amplifying circuit. The feedback circuit input is arranged for receiving a signal that is based on the amplified analog signal of the analog amplifying circuit. The analog circuit is arranged for receiving a bias signal that is based on the feedback circuit output.
H03F 1/00 - Détails des amplificateurs comportant comme éléments d'amplification uniquement des tubes à décharge, uniquement des dispositifs à semi-conducteurs ou uniquement des composants non spécifiés
H03F 1/30 - Modifications des amplificateurs pour réduire l'influence des variations de la température ou de la tension d'alimentation
H03F 3/189 - Amplificateurs à haute fréquence, p. ex. amplificateurs radiofréquence
An integrated circuit with a patching function comprises a one-time programmable memory (OTP), a random access memory (RAM), and a control unit. The control unit copies data stored on the OTP into the RAM to obtain a copied image mirroring said data. It checks for presence of one or more patch instructions in the OTP, and, if a patch instruction is found in the OTP, modifies a portion of the copied image based on the patch instruction, to obtain a patched image stored in the RAM. The integrated circuit further comprises a processing unit configured to access the patched image in the RAM. The patch can be provided wirelessly.
G06F 3/00 - Dispositions d'entrée pour le transfert de données destinées à être traitées sous une forme maniable par le calculateurDispositions de sortie pour le transfert de données de l'unité de traitement à l'unité de sortie, p. ex. dispositions d'interface
G06F 3/06 - Entrée numérique à partir de, ou sortie numérique vers des supports d'enregistrement
An integrated circuit, comprising a single-ended pin for transmitting and/or receiving an RF signal. A first matching network is configured to match an impedance of the RF signal. A second matching network is configured to match an impedance of an on-chip differential circuit. A third matching network is configured to match an impedance of an on-chip single-ended circuit, wherein the third matching network is connectable to the first matching network. A transformer is connected or connectable to the second matching network and to the first matching network. Switches control an operating mode of the integrated circuit The second matching network is connected with the first matching network via the transformer, or the third matching network is connected with the first matching network.
An automatic calibration of a clock of a wireless portable part with respect to a clock of a fixed part in a field environment. The calibration performed in the field environment negates the need to calibrate the clock during manufacture and negates the need for an initial field recalibration because of temperature differences between manufacture and the field. In performing the calibration the frequency of the clock of the portable part is varied until the portable part is synchronous with the fixed part to with in a range of timing bits. The portable part is declared calibrated after remaining calibrated for a defined number of data frames.
G06F 1/12 - Synchronisation des différents signaux d'horloge
H04L 7/04 - Commande de vitesse ou de phase au moyen de signaux de synchronisation
H03L 1/02 - Stabilisation du signal de sortie du générateur contre les variations de valeurs physiques, p. ex. de l'alimentation en énergie contre les variations de température uniquement
H03L 7/12 - Détails de la boucle verrouillée en phase pour assurer la synchronisation initiale ou pour élargir le domaine d'accrochage en utilisant un signal de balayage
H04L 7/10 - Dispositions pour synchronisation initiale
87.
Subband domain echo masking for improved duplexity of spectral domain echo suppressors
A method and system for improving a perceived duplexity of handsfree telephone applications is disclosed. An echo suppression circuit for a device comprising loudspeaker and microphone is described. A circuit attenuates a subband of a transmit signal, wherein the transmit signal is captured by the microphone and wherein the transmit signal comprises an echo of a far-end signal rendered by the loudspeaker and a near-end signal. The attenuation circuit further determines a subband far-end indicator of a voice activity in the far-end signal; determines a subband near-end indicator of a voice activity of the near-end signal; determines a subband masking weight; determines a subband attenuation for the transmit signal in the subband; and attenuates the subband of the transmit signal using the determined subband attenuation.
H04M 9/08 - Systèmes téléphoniques à haut-parleur à double sens comportant des moyens pour conditionner le signal, p. ex. pour supprimer les échos dans l'une ou les deux directions du trafic
H04B 3/20 - Réduction des effets d'échos ou de sifflementSystèmes à ligne de transmission Détails ouverture ou fermeture de la voie d'émissionCommande de la transmission dans une direction ou l'autre
H04B 15/00 - Suppression ou limitation du bruit ou des interférences
Mobile electronic devices and related methods to achieve an enhanced security level are disclosed. A security module is deeply embedded in a non-open companion chip of the mobile device, wherein the companion chip controls vital functions of the mobile device. Any security technology can be provided by the security module. The security module can, in case of a security violation, disable all vital functions of the companion chip without requiring communicating to other components of the mobile device. The vital functions deployed in the companion chip comprise e.g. system power management or audio functions.
Systems and methods thereof for obtaining metrics and an accurate threshold to prevent loudspeaker overheating, based on autocorrelation and cross-correlation of band-pass filtered current and voltage measurements are disclosed. The methods invented are based on instantaneous voltage and current measurements. The invention does not require a DC or pilot signal to be added to the audio signal in order to do perform the measurement, and it is not disturbed by capacitive or inductive components in the complex impedance of the voice coil.
H04R 29/00 - Dispositifs de contrôleDispositifs de tests
H03F 1/52 - Circuits pour la protection de ces amplificateurs
G01R 1/00 - Détails ou dispositions des appareils des types couverts par les groupes ou
G01R 19/00 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe
G01R 19/06 - Mesure de la composante réelleMesure de la composante réactive
G01R 19/165 - Indication de ce qu'un courant ou une tension est, soit supérieur ou inférieur à une valeur prédéterminée, soit à l'intérieur ou à l'extérieur d'une plage de valeurs prédéterminée
An amplifier circuit and a method of amplification using automatic gain control (AGC) are disclosed. A method for reducing distortions incurred by an audio signal when being rendered by an electronic device is described. The method comprises receiving an input signal; determining signal strength; determining a frequency-dependent AGC filter; wherein the frequency-dependent AGC filter is adapted to selectively attenuate the input signal within a number N of predetermined frequency ranges, according to corresponding N degrees of attenuation; wherein N predetermined frequency ranges depend upon a rendering characteristic of the electronic device; and wherein the N-degrees of attenuation depend upon the signal strength; and attenuating the input signal using the frequency-dependent AGC filter to obtain an output signal for rendering by the electronic device.
Method and apparatus for controlling a digitized analog audio device from a control circuit communicating with the digitized analog audio device with a serial digital analog audio protocol on a serial communication medium multiplexes command data words within digitized analog audio data frames. The digitized analog audio device extracts the command data words from the digitized analog audio data frames. The command data word includes a keyword packet, a command packet, an optional address packet, and an optional data packet. The keyword packet, a command packet, an optional address packet, and an optional data packet are each inserted into a separate number of truncated digitized analog audio data frames for iterative and successive transmission. The iterative transmission of the packets of the command word decreases the likelihood that digitized analog audio frames would contain packets of the command word.
A package is connected at a first side to a printed circuit board and with a die fixed to it on a second side opposite to the first side. The package has an integrated pre-match circuit to provide an impedance match for a signal to be sent to a circuit external to the package. The signal has a predetermined main frequency component. The pre-match circuit has a pair of transmission lines and a pair of stubs on a predetermined layer of the package and connected to the pair of transmission lines. The pair of stubs have a length such as to form a short circuit for an harmonic frequency of the main frequency component in the signal.
H01L 23/00 - Détails de dispositifs à semi-conducteurs ou d'autres dispositifs à l'état solide
H05K 1/11 - Éléments imprimés pour réaliser des connexions électriques avec ou entre des circuits imprimés
H05K 1/16 - Circuits imprimés comprenant des composants électriques imprimés incorporés, p. ex. une résistance, un condensateur, une inductance imprimés
93.
Circuits and methods to reduce pin count of a single channel device with a multi-channel serial interface
A channel selection circuit in a serial audio communication device provides channel selection for insertion or extraction of data to or from a multiplexed serial data stream without the requirement of extra channel selection inputs. The channel selection circuit has multiple counters structured such that each counter represents a channel of the serial data stream. The input of each counter receives one of the multiple synchronizing timing signals. The input of the designated counter receives one timing signal that has the greatest frequency. The remaining counters receive the word select timing signals for determining which channel is being selected. A ready output of each counter is a channel indicator in communication with multiple signal selection circuits for selecting the multiple timing signals to be transferred to a data processing device for inserting or extracting data to or from the multiplexed serial data stream.
G06F 13/42 - Protocole de transfert pour bus, p. ex. liaisonSynchronisation
H04H 20/47 - Dispositions caractérisées par des circuits ou composants spécialement adaptés à la radiodiffusion spécialement adaptés aux systèmes de radiodiffusion couverts par les groupes spécialement adaptés aux systèmes de radiodiffusion stéréophonique
H04H 20/88 - Systèmes de radiodiffusion stéréophonique
94.
Automatic gain control circuit and method for automatic gain control
A method of attenuating an input signal to obtain an output signal is described. The method comprises receiving the input signal, attenuating the input signal with a gain factor to obtain the output signal, applying a filter having a frequency response with a frequency-dependent filter gain to at least one of a copy of the input signal and a copy of the output signal to obtain a filtered signal, the frequency-dependent filter gain being arranged to emphasize frequencies within a number N of predetermined frequency ranges, N>1; wherein the filter comprises a sequence of N sub-filters, each one of the N sub-filters having a frequency response adapted to emphasize frequencies within a corresponding one of the N predetermined frequency ranges; determining a signal strength of the filtered signal, and determining the gain factor from at least the signal strength.
The invention relates to a method for audio switching and conferencing. The method comprises: providing a plurality of audio channels comprising at least one active audio channel, the active audio channel comprising at least one of an input audio stream and output audio stream; converting the input audio streams from the at least one audio channel in input data; providing audio channel communication requests between parties of the at least one active audio channel; determining a set of Boolean values depending on the parties of the audio channels; determining output data for the respective active audio channels by combining the elements of the Boolean set and the input data; and encoding the output data in output audio streams for the respective active audio channels. In this way an efficient and consistent method for audio switching and conferencing is obtained which reduces complexity of software and/or hardware and enables the number of telephone calls or simultaneous conferences between multiple groups and simple implementation of special functions like eavesdropping and microphone functions.
A method and system for emulating a byte-wise programmable memory in a sector-wise erasable memory, where emulating a byte-wise programmable memory in a sector-wise erasable memory is based on dividing the sector-wise erasable memory in a plurality of sectors, dividing each of the sectors into several memory locations suitable to store containers, with each container having a header and a payload portion, and storing a data value relating to an application in the payload portion of one of the containers and header information identifying the application in the header in an available container. The containers can be block containers, and the data portion can have two or more payload values. The storing action can be performed in such a way that the two or more payload values in the payload portion together uniquely represent the data value.
A system and method is disclosed for reconstructing high frequency components of a digital audio signal using a harmonic enhancer in a baseband integrated circuit of a receiver handset. The original spectrum of the digital audio signal is upsampled in a times two (2) upsample unit to double the size of the bandwidth. A low pass filter then removes a high frequency alias of the original spectrum. The spectrum is then modulated with a first carrier frequency and sent to a first filter bank where a low pass filter and a high pass filter shape the modulated harmonic spectrum. After gain adjustment, the modulated harmonic spectrum is added to a delayed version of the original spectrum. Additional harmonic spectra are similarly created at other carrier frequencies and added to the audio output spectra to reconstruct high frequency components of the audio signal.
A power reduction method for a first communication device that can communicate with a second communication device in a synchronized fashion. The first communication device has an electronic module and the method includes generating a communication device shut down signal by the electronic module in order to shut down the communication device apart from the electronic module at a first moment in time, generating a communication device wake-up signal by the electronic module in order to switch on and start booting of the communication device at a second moment in time after the first moment in time, and generating a communication device synchronization signal by the electronic module in order to allow the communication device to restart communicating with the second communication device in the synchronized fashion at a third moment in time after the second moment in time.
Voltage regulator for providing an output voltage (Vout) to a load (Zload) having an output transistor (T1), an operational amplifier (OA), and a first reference voltage source (VS). The negative input of the operational amplifier (OA) is connected to a feedback line (FL) to receive an input voltage derived from the output voltage. The first reference voltage source (VS) provides a reference voltage (Vref) to the positive input (IN2) of the operational amplifier (OA). The output (O1) of the operational amplifier (OA) is connected to a floating voltage source (FVS; C1). The other side of the floating voltage source is connected to a gate terminal (G) of the output transistor (T1). The floating voltage source (FVS) provides a voltage level (Vg) at the gate terminal of the output transistor (T1) higher than the output voltage of the operational amplifier (OA).
G05F 1/40 - Régulation de la tension ou de l'intensité là où la variable effectivement régulée par le dispositif de réglage final est du type alternatif utilisant des tubes à décharge ou des dispositifs à semi-conducteurs comme dispositifs de commande finale
G05F 1/44 - Régulation de la tension ou de l'intensité là où la variable effectivement régulée par le dispositif de réglage final est du type alternatif utilisant des tubes à décharge ou des dispositifs à semi-conducteurs comme dispositifs de commande finale à dispositifs à semi-conducteurs uniquement