A linear LED driving system and a driving method. The system comprises: a first LED module and a second LED module each of which comprises a plurality of LED lamp segments which are sequentially cascaded, wherein the number of the LED lamp segments in the first LED module differs from the number of the LED lamp segments in the second LED module by one, the first LED module has an input end connected to a bus voltage, and an output end connected to an input end of the second LED module by means of a flow direction limiting module, the flow direction limiting module is configured to only allow a current to flow from the first LED module to the second LED module, and a switch is connected between the input end of the first LED module and the input end of the second LED module, and is closed at a low voltage and open at a high voltage; and a driving control module, configured to: close the switch at a low voltage, and as the bus voltage increases, and control the LED lamp segments in the LED modules to be sequentially and alternately lightened; and open the switch at a high voltage, control, as the bus voltage increases, the LED lamp segments to be sequentially lightened, and control the output current. The present invention reduces design complexity and system cost, and improving system efficiency and single-order harmonic performance.
A power consumption control circuit, a chip, and an electronic device; the circuit includes: a data serial-to-parallel module that converts serial input data into parallel data and sequentially outputs the least significant bit of the parallel data; a data counting module that generates a valid flag bit when the number of valid data bits in the serial data reaches a preset value; a data latch control module that generates a valid latch pulse after the to-be-controlled circuit completes the reception and transmission of data; a power consumption mode determination module that generates a power consumption control signal for the to-be-controlled circuit; when valid data is received and there is a need to control the downstream circuit, the power consumption control signal switches the to-be-controlled circuit into working mode; otherwise, the power consumption control signal switches the to-be-controlled circuit into power-saving mode.
The present invention provides a deadtime adjustment method, an adaptive ZVS control method and a switching power supply. The deadtime adjustment method comprises: step 11), acquiring a first duration, collecting a second duration of the current period, and comparing the first duration with the second duration; step 12), if the first duration is greater than the second duration, reducing the on-time of a clamping transistor by a preset duration in the next period; if the first duration is smaller than the second duration, increasing the on-time of the clamping transistor by the preset duration in the next period; and if the first duration is equal to the second duration, maintaining the on-time of the clamping transistor in the next period; and step 13), returning to step 11) to sequentially adjust the deadtime between the clamping transistor in each period and a main switch. The present invention can accurately realize self-adaptive control in the deadtime full-load range between an upper clamping transistor and a main switching transistor, thereby achieving high safety, low loss of the main switching transistor, high system efficiency, and wide application range.
A PWM signal conversion circuit and method, and an LED dimming system. The circuit includes: a PWM signal detection module, which outputs a first voltage corresponding to a low-level time of the PWM signal and a second voltage corresponding to a high-level time of the PWM signal; an addition module, which sums the first and second voltages to obtain a third voltage; a switch signal generation module, which generates a switch signal based on the third voltage; a duty cycle ratio generation module, which obtains a duty cycle ratio of the PWM signal based on a counting to the high level of the PWM signal by the switch signal; and an output voltage generation module, which obtains an output voltage related to a duty cycle of the PWM signal based on the duty cycle ratio.
Provided in the present invention are a linear LED driving circuit and an electronic device. The circuit comprises two constant-current control modules, wherein when a busbar voltage is lower than a forward turn-on voltage of an LED, power is supplied by means of an input capacitor, and a constant current is controlled by means of a first/third constant-current control module; when the busbar voltage is higher than the forward turn-on voltage of the LED but lower than the voltage on the input capacitor, power is supplied by means of the busbar voltage, and a constant current is controlled by means of a second/fourth constant-current control module; and when the busbar voltage is higher than the voltage on the input capacitor, power is supplied by means of the busbar voltage, the input capacitor is charged, and a constant current is controlled by means of the second/fourth constant-current control module. In the linear LED driving circuit and electronic device of the present invention, by means of a switch module and the two constant-current control modules, high-order harmonics are optimized by means of the simplest method to meet requirements of the standards; and requirements for an external element can also be reduced by means of a parasitic diode of a power transistor itself, thereby further reducing the overall cost of a system.
A circuit for automatically calculating a speed of a rotor includes: an edge generation module configured to receive Hall signals of three phases, and generate an edge response signal for the Hall signal of each phase; a counting module, which is connected to an output end of the edge generation module, configured to count the time difference between two adjacent jumps of the Hall signal of each phase on the basis of an output signal of the edge generation module to obtain a count value of each phase, output the current count value, and generate a trigger signal when the Hall signal of any phase jumps; and a division module, which is connected to an output terminal of the counting module, configured to divide an angle difference between the two adjacent jumps of the Hall signal by the current count value to obtain a rotation speed of an electric motor.
H02P 6/17 - Dispositions de circuits pour détecter la position et pour l’obtention d’informations sur la vitesse
G01P 3/66 - Dispositifs caractérisés par la détermination du temps mis à parcourir une distance constante en utilisant des moyens électriques ou magnétiques
A memory control system includes: a memory having a main storage module and a built-in EEPROM; a storage controller which, in a normal mode, reads a program in the main storage module on the basis of an instruction of a processor and performs read-write control on the built-in EEPROM, and in a test mode, performs read-write control on the main storage module or the built-in EEPROM on the basis of configuration of a test control signal, or completes a self-test on the basis of an instruction of the test control signal; and the processor. According to the present disclosure, resource consumption is greatly reduced; logic of a hardware control reading part after dormancy is omitted and the time consumed during dormancy and wake-up is reduced; and only one counter and one time sequence control unit are used to implement control of the time sequence of the whole system.
Provided in the present application are a forward and reverse rotation control circuit for a sensorless motor, a method and a motor controller. According to one example of the present application, a forward and reverse rotation control circuit comprises: a logic control module, used for providing configuration parameters and control signals, wherein the configuration parameters comprise a forced dragging angle increment and a forced dragging angle initial value, and the control signals comprise a forward and reverse rotation control signal and a selection signal; a rotor angle calculation module, used for receiving the forced dragging angle increment and the forced dragging angle initial value, so as to obtain a rotor angle calculation value by accumulation; a rotor angle estimation module, used for estimating an angle increment on the basis of voltage and current signals of a motor, and limiting an angle increment estimated value on the basis of the forward and reverse rotation control signal, so as to obtain a rotor angle estimated value by accumulation; and a selection module, used for selecting, on the basis of the selection signal, to control the motor according to the rotor angle calculation value or the rotor angle estimated value.
The present invention provides an ECC anti-attack method and apparatus suitable for an automobile security chip, a device, and a medium. According to the present invention, by adjusting points accumulated in a scalar average decomposition method, an operational operation in each cycle is the same, that is, point double and point addition are performed in each cycle, so that the differences in branch operation time and power consumption between the cycles in the operation process can be eliminated, sensitive information cannot be identified by means of a power consumption attack, and the problem of being unable to meeting high fault error detection rate required by the ISO 26262 function security standard of the automobile chip due to the use of a pseudo-operation manner is also avoided.
The present application relates to a method, circuit, and motor driving system for adaptively adjusting a PWM duty cycle, comprising: sampling a direct current bus voltage and performing a low-pass filtering; determining whether the direct current bus voltage is under-voltage; if yes, entering an under-voltage protection state; and if not, executing the next step; calculating a new duty cycle and a new amplitude; determining whether the new duty cycle is greater than 100%; if yes, applying a weak magnetic control; and if not, adjusting a duty cycle of PWM signals through the new amplitude. Without altering the core current loop, torque loop, or speed loop of the motor driving system, this application adaptively adjusts the PWM duty cycle based on existing sine wave generators and PWM generators, effectively mitigating the impact of direct current bus voltage fluctuations on motor performance, ensuring straightforward operation, and significantly reducing costs.
H02H 7/09 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour moteurs dynamo-électriques contre une surtensionCircuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour moteurs dynamo-électriques contre une réduction de tensionCircuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour moteurs dynamo-électriques contre une interruption de phase
H02H 3/24 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une baisse ou un manque de tension
H02H 7/08 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour moteurs dynamo-électriques
H02P 6/28 - Dispositions pour la commande du courant
H02P 27/08 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par le type de tension d'alimentation utilisant une tension d’alimentation à fréquence variable, p. ex. tension d’alimentation d’onduleurs ou de convertisseurs utilisant des convertisseurs de courant continu en courant alternatif ou des onduleurs avec modulation de largeur d'impulsions
A LED dimming circuit, including a low-level-voltage generation module, a high-level-voltage generation module, a base-voltage generation module, and a dimming-signal generation module. By counting the high and low levels of a low-frequency PWM signal, high and low-level voltages with respect to time are obtained; a constant current source and a capacitor are used to convert high-frequency switching signals to a DC base voltage that is only related to the duty cycle of the low-frequency PWM signal. When the base voltage is greater than a predetermined voltage, the base voltage is output as the dimming signal; when the base voltage is less than the predetermined voltage, a new PWM signal is output as the dimming signal, whose magnitude is the same of that of the predetermined voltage, wherein the average values of the new PWM signal and the base voltage are the same.
H05B 45/10 - Commande de l'intensité de la lumière
H05B 45/325 - Modulation de la largeur des impulsions [PWM]
H05B 45/345 - Stabilisation du courantMaintien d'un courant constant
H05B 45/59 - Circuits pour faire fonctionner des diodes électroluminescentes [LED] réagissant aux dysfonctionnements des LED ou à un comportement indésirable des LEDCircuits pour faire fonctionner des diodes électroluminescentes [LED] sensibles à la vie des LEDCircuits de protection pour réduire ou supprimer les effets de scintillement ou de lueur
A logic level conversion circuit (1) and a system. The logic level conversion circuit comprises a coupling capacitor (C0), a level initialization module (11) and a logic level determination module (12), wherein a first end of the coupling capacitor (C0) receives input data (Data_in), and a second end thereof is connected to an input end of the logic level determination module (12); the level initialization module (11) is connected to the input end of the logic level determination module (12), and sets the input end of the logic level determination module (12) to be at an initial voltage when being reset; and the logic level determination module (12) compares the voltage of the second end of the coupling capacitor (C0) with a comparison voltage (Vcomp) so as to determine the logic level of the input data (Data_in). The logic level conversion circuit (1) and the system realize conversion of data at different logic levels, and a level node inside the logic level conversion circuit (1) can be selected as a reference voltage (Vref), thereby making the use thereof more flexible; and the application complexity for applying the circuit is further reduced.
Provided in the present invention are an electric-motor start control method, apparatus and system. The method comprises: obtaining a cumulated electric-parameter value on the basis of the cumulation of electric parameters, and alternately assigning the cumulated electric-parameter value to a direct-axis electric parameter and a quadrature-axis electric parameter; obtaining a strong-dragging angle on the basis of the cumulation of angles; generating a control signal for an electric motor on the basis of a real-time direct-axis electric parameter, a real-time quadrature-axis electric parameter and a real-time strong-dragging angle, and driving the electric motor to operate; and repeating the above steps until the direct-axis electric parameter or the quadrature-axis electric parameter reaches a target electric parameter, continuing to cumulate the strong dragging angles, performing strong dragging on the electric motor on the basis of the corresponding control signal, and when the strong-dragging angle is equal to the angle of a rotor, completing the start of the electric motor. Direct-axis and quadrature-axis voltages (or currents) are controlled to alternately cumulate In order to perform strong dragging on the electric motor, which is embodied as alternately applying forces, which are in two mutually perpendicularly directions, to the rotor. The present invention can shorten the start duration of an electric motor and reduce occupied resources in a CPU; moreover, the process of a starting operation is simple, and the electric motor can be started no matter where a rotor of the electric motor is.
The present invention provides a motor closed-loop detection circuit and method. The motor closed-loop detection circuit comprises: a motor open-loop path, configured to provide an open-loop angle increment and calculate an open-loop angle; a motor estimation path, configured to estimate an angle increment of a motor to obtain an estimated angle increment, and calculate same to obtain an estimated angle; and a closed-loop detection module, configured to output a first closed-loop marker signal when the open-loop angle increment is continuously equal to the estimated angle increment for n times within one electric cycle range, and feed back the first closed-loop marker signal to the motor open-loop path so as to adjust the open-loop angle increment; and to compare an updated open-loop angle with the estimated angle, and output a second closed-loop marker signal when the updated open-loop angle is equal to the estimated angle. The present invention is implemented using a hardware circuit, and existing motor paths are multiplexed; the structure is simple, the costs are low, CPU resources are not occupied, and the operation power consumption of the motor is low. The calculation of the modules multiplexes devices in a calculation unit library, so that the costs are reduced. The closed-loop detection method is simple, fast, and easily implemented; a same set of closed-loop detection circuit is used to implement two stages of closed-loop functions, so that the area consumption is extremely low.
A power consumption control circuit (1), a chip, and an electronic device. The power consumption control circuit (1) comprises: a data serial-to-parallel module (10), which converts serial input data into parallel data and sequentially outputs the lowest bits of the parallel data; a data counting module (11), which generates a valid flag bit when the number of valid data bits of serial data reaches a preset value; a data latch control module (12), which generates an effective latch pulse once a circuit to be controlled completes data reception and transmission; and a power consumption mode determining module (13), which generates a power consumption control signal of the circuit to be controlled, and controls said circuit to enter a working mode when valid data is received and a lower-level circuit needs to be controlled, or otherwise, controls the circuit to be controlled to enter a power-saving mode. When the power consumption control circuit (1) does not receive data, receives invalid data, or does not need to control the lower-level circuit, an outputted control signal enables the circuit to be controlled to be in the power-saving mode. When the power consumption control circuit (1) receives valid data and needs to control the lower-level circuit, the outputted control signal enables the circuit to be controlled to work normally.
The present invention provides a motor starting method and a motor starting circuit. The motor starting method comprises: 1) obtaining the current position of a rotor; 2) asynchronously dragging a motor on the basis of the current position of the rotor and the rotating direction of the motor, so that an open-loop angle gradually increases to a target starting open-loop angle and a quadrature-axis reference current gradually increases, wherein the open-loop angle increment gradually increases with time in the asynchronous dragging process, thereby achieving smooth starting; and 3) the motor entering a closed-loop control mode. According to the present invention, introduction of the open-loop angle, open-loop angle increment, and angle increment enables the starting circuit easier to implement in hardware, and thus, starting can be completed by using only one adder, so that few hardware resources are consumed, and CPU resources are not occupied; by adjusting the open-loop angle increment, the smooth starting is achieved, and the "gear shifting" feeling of motor rotation is reduced; the introduction of the angle increment accelerates the starting process and suppresses the probability of starting inversion; and the present invention can be expanded to any group of motors, and the starting of each motor multiplexes a group of computational logic, so that the cost is low.
H02P 1/46 - Dispositions de démarrage de moteurs électriques ou de convertisseurs dynamo-électriques pour faire démarrer des machines dynamo- électriques ou des convertisseurs dynamo-électriques pour faire démarrer individuellement un moteur synchrone
17.
Self-adaptive constant-current driving circuit and method for three-channel multi-color LED
A self-adaptive constant-current driving circuit for a three-channel multi-color LED, including a decoder, a two-phase non-overlapping circuit, and a LED constant-current driving circuit, where the decoder determines the number of lighted channels according to a first input signal, and generates a first switch control signal and a second switch control signal; the two-phase non-overlapping circuit modulates the first switch control signal into a first two-phase non-overlapping signal and a second two-phase non-overlapping signal, and modulates the second switch control signal into a third two-phase non-overlapping signal and a fourth two-phase non-overlapping signal; the LED constant-current driving circuit controls an on/off state of the respective channel of LED according to a second input signal, and outputs a current for controlling a brightness of the respective channel of LED according to the first two-phase non-overlapping signal, the second two-phase non-overlapping signal, the third two-phase non-overlapping signal, and the fourth two-phase non-overlapping signal.
The present invention provides a hardware encryption module, a chip, and an encryption method. The hardware encryption module comprises a control unit and a storage unit; the control unit is connected to the storage unit and receives an external instruction, determines an encryption state on the basis of an encryption value in an encryption bit address of the storage unit, generates, on the basis of an external erasing instruction, control timing for controlling the erasing of the storage unit, and generates, on the basis of the encryption state and an external read-write instruction, control timing for controlling the reading and writing of the storage unit. In an encryption mode, encryption reading is only performed on a program area and a write operation is prohibited from being performed on the encryption bit address. According to the present invention, all encryption behaviors are only valid for the program area and are invalid for a data area; users are prevented from directly erasing the encryption bit address and executing powerup again for compulsory decryption, and are prevented from re-writing to the encryption bit address and executing powerup for compulsory encryption; a super read mode is discarded to effectively improve the security of a chip; and a product has high application flexibility and high security.
G06F 21/79 - Protection de composants spécifiques internes ou périphériques, où la protection d'un composant mène à la protection de tout le calculateur pour assurer la sécurité du stockage de données dans les supports de stockage à semi-conducteurs, p. ex. les mémoires adressables directement
19.
MULTI-MOTOR CONTROL MODULE AND MOTOR DRIVING SYSTEM
The present invention provides a multi-motor control module and a motor driving system. The multi-motor control module comprises: at least two motor engine control units used for providing control signals for respective corresponding motors; a sampling unit used for sampling a phase current of each motor; a processor used for sequentially reading sampled data; a first coordinate transformation unit used for sequentially transforming a three-phase current sampling signal of each motor from a three-phase stationary coordinate system to a two-phase stationary coordinate system and a two-phase rotating coordinate system; a motor angle estimation unit used for estimating angles of the motors; a second coordinate transformation unit used for transforming, on the basis of the motor angles of the current motors, an output signal of the first coordinate transformation unit from the two-phase rotating coordinate system to the two-phase stationary coordinate system; and a motor control signal generation unit used for generating space vector pulse width modulation signals corresponding to the motors. The present invention reduces the cost of chip design, development and manufacturing, reduces the difficulty of solution development, shortens the development period, and implements the control algorithm in hardware, thereby improving the operating rate, and optimizing system control.
H02P 21/22 - Commande du courant, p. ex. en utilisant une boucle de commande
H02P 21/14 - Estimation ou adaptation des paramètres des machines, p. ex. flux, courant ou tension
H02P 27/08 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par le type de tension d'alimentation utilisant une tension d’alimentation à fréquence variable, p. ex. tension d’alimentation d’onduleurs ou de convertisseurs utilisant des convertisseurs de courant continu en courant alternatif ou des onduleurs avec modulation de largeur d'impulsions
H02P 5/74 - Dispositions spécialement adaptées à la régulation ou la commande de la vitesse ou du couple d’au moins deux moteurs électriques pour commander au moins deux moteurs dynamo-électriques à courant alternatif
20.
LED driving system and closed-loop control method for LED driving
An LED driving system and a closed-loop control method for LED driving are provided; the LED driving system includes an LED load, a constant-current control module, an electrolytic capacitor, a discharging-voltage measuring module, a bus-voltage measuring module and a charging-current control module, wherein the charging-current control module is connected to an output of the discharging-voltage measuring module, the bus-voltage measuring module and a lower plate of the electrolytic capacitor; the charging current of the electrolytic capacitor is adjusted based on the control signal of the discharging-voltage measuring module and the measured voltage of the bus-voltage measuring module, wherein the charging current of the electrolytic capacitor is reduced by an subtraction operation performed by the addition and subtraction counter, and the charging current of the electrolytic capacitor is increased by an addition operation performed by the addition and subtraction counter.
Provided in the present invention are a jump edge detection module, a bleed control circuit, a method and an LED drive system. The bleed control circuit comprises: a current control module which controls a bleed current, and when a current flowing through an LED constant-current control circuit is greater than a first preset value, outputs a first bleed turn-off signal; a bleed voltage amplitude measurement module for measuring an amplitude of a bleed voltage; a jump edge detection module for detecting a jump edge of the bleed voltage; a first logic module, which outputs a second bleed turn-off signal when the duration of the bleed voltage amplitude being greater than the second preset value exceeds a set value, and which resets the second bleed turn-off signal when the bleed voltage jumps; and a second logic module which outputs a turn-off control signal when the first or second bleed turn-off signal is valid. The present invention can simplify the system design, reduce the chip area, and reduce the external capacitance, and has strong anti-interference capability.
A predictive electronic thermometer circuit structure capable of temperature compensation is provided, including: a compensation module, a thermometer circuit, and a liquid crystal display (LCD) drive module. The thermometer circuit includes a temperature measurement oscillation circuit and a real measurement module. The compensation module and the real measurement module are connected in parallel between the temperature measurement oscillation circuit and the LCD drive module. The predictive electronic thermometer circuit structure controls the on and off of the compensation module and the real measurement module through a combination logic control switch respectively. When the compensation module is off and the real measurement module is on, an actual measured data is output. When the real measurement module is off and the compensation module is on, a temperature value is output after predictive compensation. The electronic thermometer has a temperature compensation function, and measures the temperature quickly and accurately.
G01K 7/42 - Circuits pour la compensation de l’inertie thermiqueCircuits pour prévoir la valeur stationnaire de la température
G01K 1/20 - Compensation des effets des variations de température autres que celles à mesurer, p. ex. variations de la température ambiante
G01K 7/02 - Mesure de la température basée sur l'utilisation d'éléments électriques ou magnétiques directement sensibles à la chaleur utilisant des éléments thermo-électriques, p. ex. des thermocouples
G01K 7/32 - Mesure de la température basée sur l'utilisation d'éléments électriques ou magnétiques directement sensibles à la chaleur utilisant la variation de la fréquence de résonance d'un cristal
23.
Class D power amplification modulation system for self-adaptive adjustment of audio signal, method, device, processor and storage medium
A Class D power amplification modulation system for self-adaptive adjustment of an audio signal is provided, including an amplification circuit module, a pulse width modulation (PWM) circuit module connected to the amplification circuit module, a frequency detection circuit module, a carrier generator module connected to the frequency detection circuit module, an amplitude detection circuit module, a direct current (DC) potential adjustment module connected to the amplitude detection circuit module, and a drive circuit module. A method, a device, a processor, and a computer-readable storage medium are also provided. The characteristics of the circuit in the signal time domain and frequency are improved by simultaneously controlling the amplitude and the frequency of the audio signal, to minimize power consumption of signals with different amplitudes and frequencies, and to improve EMI performance, or to balance the circuit power consumption and EMI characteristics.
A method for fault processing of HALL position sensor in brushless direct current motor, comprising: step (1) detecting HALL signals by an edge detection, and recording the times of edge hopping; step (2) determining whether the absolute value of a difference between the rotor position change represented by HALL and an angle value calculated internally by MCU is within the preset error range; if so, updating the angle value to the angle representing the rotor position that is detected by HALL, otherwise, increasing the MCU internal angle value according to an angle increment previously calculated through a motor rotation speed; step (3) obtaining an acceptable range based on an original value of the previous angle increment. The present invention provides an internal degree to record angle, and the motor commutation is accomplished according to the degree angle value recorded by the internal degree.
H02K 11/215 - Dispositifs utilisant un effet magnétique, p. ex. des éléments à effet Hall ou magnéto-résistifs
H02K 29/08 - Moteurs ou génératrices à dispositifs de commutation non mécaniques, p. ex. tubes à décharge ou dispositifs à semi-conducteurs avec des dispositifs détecteurs de la position utilisant des dispositifs à effet magnétique, p. ex. dispositifs à effet Hall ou magnéto-résistances
Provided in the present invention is a power driving circuit. The power driving circuit comprises: a high/low-side driving module, which is used for performing turning-on and turning-off according to a cooperative control signal, and when turning-on is performed, generating a high-side driving signal according to a high-side input signal and generating a low-side driving signal according to a low-side input signal; a cooperative processing module, which is used for comparing an input voltage with a threshold voltage and generating the cooperative control signal, wherein the threshold voltage is switched between a first voltage and a second voltage according to the cooperative control signal; and a temperature sensing module, which is connected to an output end of the cooperative processing module, and is used for sensing a temperature change, generating a sensing signal that changes along with the temperature, generating a sensing increment, and controlling, according to the cooperative control signal, whether to output the sensing increment and the sensing signal in a superposed manner, wherein the input voltage is related to the sensing signal. By means of the power driving circuit provided in the present invention, the problem of inconsistent actions being present between IPMs in an existing driving system is solved.
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
H02H 5/04 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions non électriques normales de travail avec ou sans reconnexion sensibles à une température anormale
26.
Circuit structure for realizing circuit pin multiplexing
A circuit structure for realizing circuit pin multiplexing, comprising an MCU module, a temperature sensing circuit and a functional module circuit. The output end of the temperature sensing circuit is connected with an enable signal interface of the MCU module, the output voltage of the temperature sensing circuit is always higher than the threshold voltage of the enable signal, and the MCU module is connected with the functional module circuit. The circuit structure of the present invention realizes the mutual influence of analog signal output and digital signal transmission by designing a temperature sensing output curve, and achieves multi-function multiplexing of a single pin, so that the output of the analog signal and the input of the digital signal can share the pins, it solves the problem of the limitation of the number of pins, and promotes the transmission of the signal and improves the cost performance of the circuit.
H03K 17/22 - Modifications pour assurer un état initial prédéterminé quand la tension d'alimentation a été appliquée
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
G05F 1/569 - 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 sensible à une condition du système ou de sa charge en plus des moyens sensibles aux écarts de la sortie du système, p. ex. courant, tension, facteur de puissance à des fins de protection
H03K 17/082 - Modifications pour protéger le circuit de commutation contre la surintensité ou la surtension par réaction du circuit de sortie vers le circuit de commande
H03K 19/0175 - Dispositions pour le couplageDispositions pour l'interface
H03K 19/173 - Circuits logiques, c.-à-d. ayant au moins deux entrées agissant sur une sortieCircuits d'inversion utilisant des éléments spécifiés utilisant des circuits logiques élémentaires comme composants
The present invention provides a memory control system and method. The system comprises: a memory which comprises a main storage module and a built-in EEPROM; a storage controller which, in a normal mode, reads a program in the main storage module on the basis of an instruction of a processor and performs read-write control on the built-in EEPROM, and in a test mode, performs read-write control on the main storage module or the built-in EEPROM on the basis of configuration of a test control signal, or completes a self-test on the basis of an instruction of the test control signal; and the processor. According to the present invention, resource consumption is greatly reduced; logic of a hardware control reading part after dormancy is omitted and the time consumed during dormancy and wake-up is reduced, the process is simple and convenient, and the efficiency is high; only one counter and one timing control unit are used to implement control of the timing of the whole system, thereby effectively reducing the size and power consumption of the whole system.
A monolithic bus slave circuit structure is provided, including: a monolithic integrated chip, a rectifier bridge, a first light circuit, a second light circuit, and a third light circuit. The monolithic integrated chip includes a bus voltage input pin, a ground pin, a first drive signal output pin, a second drive signal output pin, a third drive signal output pin, and a power output pin. Both the bus voltage input pin and the ground pin are connected to an output end of the rectifier bridge, two input ends of the rectifier bridge are connected to a positive line and an negative line of a bus respectively, the ground pin is grounded. The monolithic bus slave circuit structure realizes the intelligent constant current drive function and drive the light circuits with constant current in the voltage range of the whole bus, which does not depend on the parameters of the LEDs.
H05B 45/375 - Alimentation du circuit à découpage [SMPS] en utilisant une topologie de dévoltage
H05B 47/155 - Commande coordonnée de plusieurs sources lumineuses
H05B 45/48 - Détails des circuits de charge à LED avec un contrôle actif à l'intérieur d'une matrice de LED ayant des LED organisées en chaînes et comportant des dispositifs de dérivation parallèles
29.
CIRCUIT AND METHOD FOR AUTOMATICALLY CALCULATING SPEED OF ROTOR
Provided in the present invention are a circuit and method for automatically calculating the speed of a rotor. The circuit comprises: an edge generation module, which is used for receiving Hall signals of three phases, i.e. U, V and W, and respectively generating an edge response signal for the Hall signal of each phase; a counting module, which is connected to an output end of the edge generation module, counts the time difference between two adjacent jumps of the Hall signal of each phase on the basis of an output signal of the edge generation module, so as to obtain a count value of each phase, outputs the current count value, and generates a trigger signal when the Hall signal of any phase jumps; and a division module, which is connected to an output end of the counting module, and divides the angle difference between the two adjacent jumps of the Hall signal by the current count value, so as to obtain a rotation speed of an electric motor. The present invention achieves accurate calculation of a rotation speed, is convenient and simple to operate, takes a short development time, occupies few CPU resources, and has wide application scenarios.
The present invention relates to a method for applying a virtual load to a wireless charging receiver. The method comprises the following steps: (1) establishing a communication connection between a wireless charging transmitter (TX) and a wireless charging receiver (RX); (2) when the wireless charging receiver (RX) is in a no-load state, adding a virtual load to the wireless charging receiver (RX) to adjust a communication waveform and a coil waveform; and (3) determining whether the wireless charging transmitter (TX) and the wireless charging receiver (RX) are currently in a negotiation period, and rationally using the virtual load according to a determination result. By using the method for applying a virtual load to a wireless charging receiver in the present invention, by starting from the improvement of the aspect of a coil waveform and the aspect of a communication waveform, the amplitude of an alternating-current signal on a coil can be made relatively stable by means of adding a virtual load to a wireless charging receiver (RX), which is conducive to the wireless charging receiver (RX) and a wireless charging transmitter (TX) performing communication demodulation and decoding; and the method has a relatively significant application effect.
A battery protection chip, a battery system, and a battery protection method. The battery protection chip (10) comprises: a discharge voltage limiting detection circuit (11) used for detecting a discharge drive signal output by a battery protection chip of a previous level, identifying the level of the discharge drive signal according to the current flow of a discharge detection signal of a battery protection chip of a current level, and reducing a high-low level conversion window voltage of the discharge drive signal; and a charge voltage limiting detection circuit (12) used for detecting a charge drive signal output by the battery protection chip of the previous level, identifying the level of the charge drive signal according to the current flow of a charge detection signal of the battery protection chip of the current level, and reducing a high-low level conversion window voltage of the charge drive signal. The battery protection chip solves the problems of high costs, difficulty in determining the ratio of voltage division by a resistor, and large power consumption during battery protection by existing cascaded battery protection chips.
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
H02H 7/18 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour pilesCircuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour accumulateurs
H02M 1/088 - Circuits spécialement adaptés à la production d'une tension de commande pour les dispositifs à semi-conducteurs incorporés dans des convertisseurs statiques pour la commande simultanée de dispositifs à semi-conducteurs connectés en série ou en parallèle
32.
SIGNAL CONDITIONING CIRCUIT AND DATA PROCESSING METHOD
The present invention provides a signal conditioning circuit and a data processing method. The signal conditioning circuit comprises: a first chopper circuit used for receiving a differential signal and performing first chopping processing on the differential signal on the basis of a first switching signal; a modulator connected to an output end of the first chopper circuit, and used for noise shaping and outputting a first digital signal; a decimation filter connected to an output end of the modulator, and used for performing sampling processing on a one-bit digital signal output by the modulator and outputting a second digital signal having a sign bit; a second chopper circuit connected to an output end of the decimation filter and performing second chopping processing on the second digital signal on the basis of a second switching signal; and a data processing circuit connected to an output end of the second chopper circuit and used for averaging the data output by the second chopper circuit. The chopper circuits are used for the signal conditioning circuit in the present invention, so that the offset voltage of the signal conditioning circuit is effectively reduced, and the effective digit of analog-to-digital conversion is increased.
A detection chip (1), a temperature detection system and a humidity detection system. Using an output drive circuit (111, 121) and an input Schmitt circuit (101) of an original IO structure (10, 11, 12) of the chip (1), together with a digital control logic module (14) and a peripheral sensor device, temperature and humidity detection functions are achieved. The structure is simple and easy to realize, having few added circuit components and increased detection precision. Furthermore, a reference resistor can be designed inside the chip (1), such that an area is smaller and costs are lower.
G05B 19/042 - Commande à programme autre que la commande numérique, c.-à-d. dans des automatismes à séquence ou dans des automates à logique utilisant des processeurs numériques
34.
METHOD FOR ADAPTIVELY CHANGING DUTY RATIO OF PWM, AND CIRCUIT AND ELECTRIC MOTOR DRIVING SYSTEM
Provided in the present invention are a method for adaptively changing the duty ratio of PWM, and a circuit and an electric motor driving system. The method comprises: performing sampling and low-pass filtering on a direct-current bus voltage; determining whether the direct-current bus voltage is undervoltage, and if so, entering an undervoltage protection state, otherwise, executing the next step; calculating a new duty ratio and a new amplitude value corresponding to the new duty ratio; and determining whether the new duty ratio is greater than 100%, and if so, performing field-weakening control, otherwise, adjusting the duty ratio of a PWM signal on the basis of the new amplitude value. By means of the method for adaptively changing the duty ratio of PWM, the circuit and the electric motor driving system in the present invention, the duty ratio of a PWM signal is adaptively adjusted on the basis of an existing sine-wave generator and PWM generator while the current loop, speed loop or torque loop of the main body of the electric motor driving system is not changed, such that the influence of the fluctuation in a direct-current bus voltage on the electric motor performance can be overcome without needing to improve the CPU performance; and the operation is simple, and the cost is greatly reduced.
A circuit structure for implementing a current change control function. The circuit structure comprises a drive circuit module, an input end of which receives an input signal; a delay clamping circuit module, which is connected to the drive circuit module and receives the input signal; and a power module, wherein an input end of the power module is connected to an output end of the drive circuit module and receives an output signal of the drive circuit module, and the input end of the power module is also connected to an output end of the delay clamping circuit module. By means of the circuit structure for implementing a current change control function, clamping is acted in a power tube starting stage by using a delay structure, such that a peak current when a power tube is turned on is limited, and the magnitude and change rate of a reverse recovery current are also limited, thereby having the function of protecting a power device; and after a clamping stage is terminated, the gate voltage of the power tube is increased to a normal value, such that a sufficient turning-on capability of the power tube is maintained.
H03K 17/567 - Circuits caractérisés par l'utilisation d'au moins deux types de dispositifs à semi-conducteurs, p. ex. BIMOS, dispositifs composites tels que IGBT
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 17/081 - Modifications pour protéger le circuit de commutation contre la surintensité ou la surtension sans réaction du circuit de sortie vers le circuit de commande
36.
LED DRIVING PULSE WIDTH MODULATION (PWM) APPARATUS AND METHOD
Provided in the present invention are an LED driving pulse width modulation (PWM) apparatus and method. The apparatus comprises: a grayscale data module (10), which is used for splitting grayscale data into high-bit grayscale data and low-bit grayscale data, and generating first high-bit grayscale data and second high-bit grayscale data according to the high-bit grayscale data; a PWM counter (20), which is used for counting a PWM clock signal, and dividing the PWM clock signal into high-bit clock data and low-bit clock data; a selector (50), which is used for gating the first high-bit grayscale data or the second high-bit grayscale data to a PWM pulse width generation module (60) in a time-division manner according to a decoding result of a decoder (40); and the PWM pulse width generation module (60), which is used for outputting a PWM pulse width signal according to the first high-bit grayscale data, the second high-bit grayscale data and the low-bit clock data. By means of the apparatus, a display grayscale is maintained while the visual refresh rate is increased, and the display fineness is also improved.
The present invention relates to a method for preventing communication crosstalk for a wireless charging system. The method comprises: a receiving terminal in a wireless charging system performing a feedback operation sending a receiving terminal communication packet to a sending terminal according to magnetic field energy sent by the sending terminal; entering an id & config stage, the sending terminal first determining a type of the receiving terminal communication packet according to a received communication packet feedback signal, then determining a type of a wireless charging receiving terminal on a current side; entering a power transfer stage, determining whether the sending terminal receives a new communication packet; confirming a type of a new communication packet according to the received new communication packet, and further determining by which side receiving terminal the currently received communication packet was sent; and finally performing matching processing to realize a matching connection between the wireless charging receiving terminal and the wireless charging sending terminal. Using the method of the present invention, communication sent by a wireless charging receiving terminal on one side of an intelligent running shoe is modified, so that communication thereof is clearly different from that of the other side of the running shoe.
H02J 50/80 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique mettant en œuvre l’échange de données, concernant l’alimentation ou la distribution d’énergie électrique, entre les dispositifs de transmission et les dispositifs de réception
38.
METHOD AND APPARATUS FOR DETECTING FOREIGN OBJECT FOR WIRELESS CHARGING SYSTEM, AND PROCESSOR THEREFOR
The present invention relates to a method for detecting a foreign object for a wireless charging system. The method comprises: when there is no offset, collecting working efficiencies and duty cycles under different loads, and after a system starts to work, acquiring a working efficiency of a receiving end, so as to calculate the power of the receiving end; determining a fixed loss of the current system according to a working frequency and a duty cycle of a sending end and the power of the receiving end, so as to calculate a power loss of the current system; by means of a comparison relationship between the power loss and the difference between the power of the sending end and the power of the receiving end under the condition of no foreign object, determining whether there is a foreign object in the system; and the system executing corresponding working processing according to a determination result. The present invention further relates to a corresponding apparatus and a processor therefor. By using the method, the apparatus and the processor therefor in the present invention, the accurate detection of when a wireless charging system works at any position and there is a foreign object can be realized, and when there is a foreign object, the system can also work normally without a false trigger.
H02J 50/60 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique sensibles à la présence d’objets étrangers, p. ex. détection d'êtres vivants
The present invention relates to a high-precision clock circuit structure, comprising a charge/discharge current generating circuit, a linear voltage regulator circuit, a ramp generating circuit, a comparator circuit, and a trigger circuit. The linear voltage regulator circuit is connected to the charge/discharge current generating circuit; the ramp generating circuit is connected to the charge/discharge current generating circuit; the comparator circuit is connected to the ramp generating circuit; the trigger circuit is connected to the comparator circuit. By means of the high-precision clock circuit structure in the present invention, the temperature drift and the frequency absolute value of clock frequency can be independently calibrated to obtain an extremely low temperature coefficient and high precision. A core oscillation part of the clock is powered by an internal linear voltage regulator, to prevent effect of fluctuation of the power supply VDD on the oscillation frequency, so as to obtain an extremely low voltage coefficient. The ramp generating circuit uses a same current source to charge a same capacitor by means of different switches to obtain a square wave having a duty ratio of 50%.
Provided in the present invention are a PWM signal conversion circuit and method, and an LED dimming system. The PWM signal conversion circuit comprises: a PWM signal detection module (11), which outputs a first voltage corresponding to a low-level time of a PWM signal, and a second voltage corresponding to a high-level time of the PWM signal; an addition module (12), which sums the first voltage and the second voltage to obtain a third voltage; a switch signal generation module (13), which generates a switch signal on the basis of the third voltage; a duty ratio value generation module (14), which obtains a duty ratio value on the basis of a high-level count of the switch signal for the PWM signal; and an output voltage generation module (15), which obtains, on the basis of the duty ratio value, an output voltage related to the duty ratio of the PWM signal. In the present invention, there is no need to use a large capacitor, and a peripheral circuit of a chip is simple; only one PWM signal cycle is required for extracting the duty ratio of a PWM signal, thereby achieving rapidness and high efficiency; and the frequency of performing duty ratio counting on the PWM signal is a fixed multiple of the frequency of the PWM signal itself; therefore, the duty ratio count is always constant regardless of how the frequency of the PWM signal changes, and thus the accuracy is high.
The present invention provides an optical MOS solid relay, comprising a light emitting device, a photo-generated voltage device and an output power device. The photo-generated voltage device comprises: a photoelectric conversion circuit and a control circuit; the photoelectric conversion circuit comprises a first photodiode to an N-th photodiode connected in series. The control circuit comprises a PNP triode, an NPN triode, an optical switch, a diode and a resistor. The connections of the PNP triode, the NPN triode, the optical switch, the diode and the resistor are configured as: when the light emitting device generates illumination, a silicon-controlled rectifier structure bleed circuit composed of the PNP triode and the NPN triode is turned off, and a photo-generated voltage provided by the photoelectric conversion circuit for the output power device is greater than a threshold of the output power device, so that the output power device is turned on; when the light emitting device does not generate illumination, the silicon-controlled rectifier structure bleed circuit composed of the PNP triode and the NPN triode is turned off, so that the output power device is turned off.
H03K 17/042 - Modifications pour accélérer la commutation par réaction du circuit de sortie vers le circuit de commande
H03K 17/78 - 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 opto-électroniques, c.-à-d. des dispositifs émetteurs de lumière et des dispositifs photo-électriques couplés électriquement ou optiquement
42.
ADAPTIVE ADJUSTMENT THREE-CHANNEL COLORED LAMP LED CONSTANT-CURRENT DRIVE CIRCUIT AND METHOD
The present invention provides an adaptive adjustment three-channel colored lamp LED constant-current drive circuit and a method, the circuit comprising: a decoder, a two-phase non-overlapping circuit, and an LED constant-current drive circuit; the decoder is used to determine, according to a first input signal, the number of illuminated channels, and to generate a first switch control signal and a second switch control signal; the two-phase non-overlapping circuit is used to modulate the first switch control signal into a first two-phase non-overlapping signal and a second two-phase non-overlapping signal, and to modulate the second switch control signal into a third two-phase non-overlapping signal and a fourth two-phase non-overlapping signal; the LED constant-current drive circuit is used to control the on and off of an LED according to a second input signal, to output a current according to the first two-phase non-overlapping signal, the second two-phase non-overlapping signal, the third two-phase non-overlapping signal and the fourth two-phase non-overlapping signal, and to control the brightness of the LED.
A low-power-consumption hygrothermograph circuit structure. The circuit structure comprises: a micro-control unit, a register module and a clock module. The micro-control unit is connected to an external software module and is used to configure the register module. The register module is connected to the micro-control unit and is used to measure temperature and humidity by means of changes to an internal state machine of the register module. The clock module is connected to the register module and is used to provide a clock source signal for the register module. The present invention further relates to a corresponding measurement control method. In the circuit structure and the measurement control method therefor, the problem of measurement precision caused by a system framework is avoided by mean of a hardware mode. Compared to a software mode, since the hardware mode is not affected by the working frequency of the system, the reliability is thus higher; and the power consumption of the system is further reduced, thereby having high practicality.
The present invention relates to a circuit structure for implementing lead/lag commutation of an electric motor. The circuit structure comprises: a Hall angle mapping module for receiving three Hall signals generated by a Hall module of an external electric motor and respectively configuring the Hall signals and converting same into Hall synchronization angle values; a Hall angle update module for selecting a corresponding angle update mode according to the internal logic of the circuit structure; a three-phase angle generation module for performing time-sharing computation on angles generated by the Hall angle update module, so as to generate current three-phase angle signals; an angle conversion module for performing corresponding angle conversion on the three-phase angle signals generated by the three-phase angle generation module; and a PWM generation module for generating three-phase six-way complementary PWM waveforms. By means of the circuit structure of the present invention, only some additional logic circuit modules are added, such that a phase lead/lag operation can be easily implemented, and smooth switching can be realized between a square wave control mode and a sine wave control mode.
Provided in the present invention is a loop control system for an integrated capacitor. The loop control system is configured with a loop control module, a capacitor control module, an oscillator module, a counter module and a digital-to-analog conversion module, wherein the counter module is used for starting counting upon receiving a pulse signal from the oscillator module, deciding whether to increase or decrease the count according to a carry or borrow control signal, and finally outputting several bits of digital logic signals to the digital-to-analog conversion module. By means of increasing the number of bits of the digital logic signals output by the counter module so as to improve the precision of digital-to-analog conversion, a COMP signal can approach an analog potential, thereby realizing the output, adjustment, reception feedback and continuous adjustment of a signal of the loop control system, and finally making the loop control system achieve a stable effect. According to the present invention, a traditional external capacitor can be integrated into a chip, so as to omit the external capacitor while only a small amount of the chip area is increased, such that the overall cost of a circuit system is greatly reduced.
The present invention provides a linear LED driving circuit, a power switch detection method and a dimming control method. The linear LED driving circuit comprises a power input module (1), a power supply module (2), at least one driving module (3) and a power switch detection module (4). According to the present invention, power switch state detection and LED working state switching control are performed by means of an overflow signal of an addition/subtraction counter; when a negative electrode voltage of an LED lamp segment is lower than a certain value, the addition/subtraction counter generates an addition overflow signal, the reference is reduced, and timing is performed on the addition overflow signal to realize the power switch state detection and the LED working state switching control. The present invention is not affected by electric leakage and ignition of a power switch, and can reliably realize detection. By means of the processing of reducing the reference, an output at a low input voltage still has no strobe, and can still achieve the power switch state detection and LED working state switching, thereby avoiding the problem of false triggering by an input occurring when a high voltage is reduced to a low voltage. There is no need to add any element to the outside of a system, such that the system is simplified and system cost is reduced.
The present invention relates to a circuit structure for compensating for a Hall deviation of a brushless direct current motor. The circuit structure comprises: a CPU, into which a register value is written; an angle controller, which controls the forward and reverse rotations of an electric motor and compensates for a Hall deviation; a driving waveform generator, which generates driving waveforms according to a first angle signal DegOut provided by the angle controller and an amplitude signal rp_AmpIn provided by the CPU; a PWM wave generator, which generates a PWM signal for driving the electric motor to rotate; the electric motor, which receives the PWM signal generated by the PWM wave generator and starts to rotate; and a Hall signal detector, which receives a Hall sensor signal generated after the rotation of the electric motor, processes the signal, and transmits the signal to the angle controller, so as to calibrate a rotor angle. The present invention further relates to a method for implementing the operation of an angle controller. The circuit structure for compensating for a Hall deviation of a brushless direct current motor, and the angle controller operation method of the present invention are used, which can be quickly handled and are convenient and simple to operate, there are no strict requirements for technicians, and the development time can be reduced. By means of the present invention, no complicated software program is required, and a CPU occupies less resources.
A method for implementing brushless direct current motor Hall position sensor fault processing, comprising: detecting a Hall signal by using an edge detection means, and recording the number of edge jumps; determining whether the absolute value of the difference between a position change of a rotor represented by a Hall and an angle value calculated inside of an MCU is within a preset error range, if so, then updating the angle value inside of the MCU as an angle represented by a rotor position as detected by the Hall, otherwise, incrementing the angle value inside of the MCU according to an angle increment calculated from the rotational speed of a motor; and obtaining an acceptable range according to a last raw angle increment value. A method for implementing brushless direct current motor Hall position sensor fault processing is employed, and an internal degree recording angle is designed. Compared with a means of using a timer alone, in which the size of the count is different when the speed is fast and slow and the position of a motor rotor cannot be intuitively understood, the motor is commutated according to a degree angle value, and the current position of the motor may thus be clearly understood.
The present invention relates to a class D power amplifier modulation system for adaptive adjustment of an audio signal. The system comprises: an amplification circuit module and a PWM modulation circuit module which are connected; a frequency detection circuit module and a carrier generator module which are connected; an amplitude detection circuit module and a direct-current potential adjustment module which are connected; and a drive circuit module. The present invention further relates to a corresponding method, apparatus, processor, and computer storage medium. By the adoption of the class D power amplifier modulation system for adaptive adjustment of an audio signal, the method, the apparatus, the processor, and the computer storage medium of the present invention, by controlling the amplitude and frequency of an audio signal simultaneously, the characteristics of a circuit in signal time domain and frequency are improved, so that the power consumption of the signal at different amplitudes and frequencies is minimized and EMI performance is improved, or circuit power dissipation and EMI characteristics are balanced.
Provided is an LED dimming circuit, comprising a low-level voltage generation module (100), a high-level voltage generation module (200), a reference voltage generation module (500), and a dimming signal generation module (600). The high level and the low level of a low-frequency PWM signal are counted to obtain a high-level voltage and a low-level voltage relative to a time, and then the low-frequency PWM signal is converted into a high-frequency switching signal by means of a constant current source and a capacitor, so as to obtain a direct current reference voltage that is only associated with the duty ratio of the low-frequency PWM signal; when the reference voltage is greater than a set voltage, the reference voltage is outputted to be used as a dimming signal; and when the reference voltage is less than the set voltage, a new PWM signal having an amplitude value being the set voltage and the frequency unrelated to the low-frequency PWM signal is outputted to be used as a dimming signal, and the average value of the new PWM signal is the same as the reference voltage. The provided LED dimming circuit solves the problems that a dimming mode of combining existing analog dimming and PWM dimming has a limited dimming frequency and has a high requirement for a single chip microcomputer generating the dimming signal.
Provided are an LED driving system and a closed-loop control method for LED driving. The LED driving system comprises an LED load (1), a constant current control module (2), an electrolytic capacitor, a discharge voltage measurement module (3), a bus voltage measurement module (4) and a charging current control module (5), wherein the charging current control module (5) is connected to the discharge voltage measurement module (3), an output end of the bus voltage measurement module (4), and a lower pole plate of the electrolytic capacitor. A charging current of the electrolytic capacitor is adjusted on the basis of a control signal of the discharge voltage measurement module (3) and a measurement voltage of the bus voltage measurement module (4). The charging current of the electrolytic capacitor is increased or decreased by performing an addition operation or a subtraction operation by means of an addition and subtraction counter, such that loop compensation digitization is realized, a peripheral circuit is most simplified, and the system cost is low.
A predictive-type electronic body temperature thermometer circuit structure implementing temperature compensation, which comprises a compensation module, a body temperature thermometer circuit, and an LCD drive module, the body temperature thermometer circuit comprises a temperature measurement oscillation circuit and an actual measurement module, and the compensation module and the actual measurement module are connected in parallel between the temperature measurement oscillation circuit and the LCD drive module; the circuit structure separately controls turn-on and cut-off of the compensation module and the actual measurement module by means of combinatorial logic, where when the compensation module is off, the actual measurement module is on, and actual measurement data is output; and when the actual measurement module is off, the compensation module is on, and a temperature value having undergone predictive compensation is output. The present predictive-type electronic body temperature thermometer circuit structure implementing temperature compensation has two counting systems, an actual measurement mode and a prediction mode can be selected, and production and calibration are convenient. The electronic body temperature thermometer has a temperature compensation function, and can implement a rapid and accurate temperature measurement function.
A circuit structure for achieving multiplexing of a pin of a circuit, comprising an MCU module, a temperature sensing circuit, and a functional module circuit. An output end of the temperature sensing circuit is connected to an enable signal port of the MCU module; the output voltage of the temperature sensing circuit is always higher than a threshold voltage of an enable signal; the MCU module is connected to the functional module circuit. Thus, the problem of multi-functional multiplexing of a single pin is solved, such that output and input signals of analog signal can share a pin.
Provided is a single-chip bus slave circuit structure, comprising a monolithically integrated chip, a rectifier bridge, a first street lamp circuit, a second street lamp circuit, and a third street lamp circuit. The monolithically integrated chip is at least provided with a bus voltage input pin, a grounding pin, a first drive signal output pin, a second drive signal output pin, a third drive signal output pin, and a power supply output pin; the bus voltage input pin and the grounding pin are both connected to an output end of the rectifier bridge; an input end of the rectifier bridge is connected to positive and negative buses; and the grounding pin is further grounded. The single-chip bus slave circuit structure of the present invention is used, such that an intelligent constant-current driving function is achieved, constant-current driving of lamps is achieved within the whole bus voltage range, the constant-current characteristics of the lamps do not depend on parameters of the lamps, and the brightness of the lamps is kept uniform; meanwhile, the number of the driven lamps can be flexibly adjusted, and high energy use efficiency can be guaranteed.
The present invention relates to an FSK decoding method for a wireless charging system. The method comprises: decoding respective bits; and packaging the decoded bits so as to obtain an FSK-decoded data packet. According to the FSK decoding method for a wireless charging system in the present invention, a receiving end decodes an FSK signal sent by a transmitting end as a response, and a receiving-end device can then use the Qi EPP protocol or the Qi BPP protocol according to the obtained decoded signal. In addition, if the transmitting end supports the Qi EPP protocol, the receiving end can further perform power negotiation with the transmitting end at a negotiation stage by means of the decoded signal, so as to output a power required by the transmitting end. The same receiving-end device can support different Qi protocols and TX devices having different powers, thereby achieving good compatibility.
H04L 27/14 - Circuits de démodulationCircuits récepteurs
H02J 50/80 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique mettant en œuvre l’échange de données, concernant l’alimentation ou la distribution d’énergie électrique, entre les dispositifs de transmission et les dispositifs de réception
The present disclosure provides a switch power supply circuit, which includes a step-down transistor, a control module, a first switch transistor, a second switch transistor, a third switch transistor, and a power switch transistor. In the switch power supply circuit of the present disclosure, the first terminal of the second switch transistor is directly coupled with the input voltage, and the second switch transistor can directly obtain sufficient driving current from the input voltage to drive the power switch transistor. The present application can ensure the reliability and efficiency of the system without an additional energy storage capacitor, which reduces the costs of the system.
H02M 3/155 - 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
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
57.
Constant current driving circuit and corresponding photoelectric smoke alarm circuit
A constant current driving circuit and a corresponding photoelectric smoke alarm circuit are provided. The constant current driving circuit includes a reference voltage source module (1), a linear voltage regulator module (3), a level conversion module (2), a current mirror module (4) and a first NMOS transistor. The linear voltage regulator module (3) may control turning on and turning off thereof according to actual requirements, thus electrical energy loss may effectively be reduced for some periodically used devices. The constant current driving circuit and the corresponding photoelectric smoke alarm circuit may provide a constant current source, so that auxiliary output performance remains stable within a full temperature range, a certain timing sequence requirement is met, no standby power is consumed when not working, performance is stable, power consumption is low, and application range is wide.
Disclosed are a signal shaping circuit and a corresponding gate drive circuit. An additional NMOS transistor is added to the signal shaping circuit, thereby improving the requirements for the amplitude of an input differential signal, with resistors and capacitors that are connected in parallel being arranged in the circuit, so that the amplitude of the input differential signal needs to exceed a certain value for a certain period of time before the input differential signal is recognized as a trigger signal, and some interference or detuning noise caused by device mismatch is effectively filtered out. The gate drive circuit using the signal shaping circuit further comprises a pulse generating circuit, a level shifting circuit, a noise filter circuit and an output stage drive circuit. The cooperation of the circuits can effectively filter out the detuning noise and common mode noise. The use of the signal shaping circuit and the corresponding gate drive circuit can enable the circuits to work more reliably and to have a more stable performance.
A method for implementing temperature control for a wireless charging system comprises the following steps: (1) initializing a power control marker to be an initial value; (2) calculating a power loss; (3) a transmission end determining whether a value of the power loss is greater than a preset power loss threshold, and if so, proceeding to step (4), otherwise, the transmission end regulating an operation frequency according to an actual data packet sent by a receiving end, and proceeding to step (2); and (4) the transmission end determining whether a received power value of the receiving end is less than a preset received power threshold, and if so, the transmission end performing no regulation of the operation frequency, and exiting the step, otherwise, the transmission end regulating the operation frequency, and proceeding to step (2). The method for implementing temperature control for a wireless charging system solves the problem in which a charging current of a transmission end is excessively large, and board components at the transmission end have an excessively high temperature, thereby effectively reducing heat generation of components at transmission ends, and ensuring normal and stable system operations.
H02J 7/04 - Régulation du courant ou de la tension de charge
H02J 7/02 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries pour la charge des batteries par réseaux à courant alternatif au moyen de convertisseurs
60.
Drive circuit with zero-crossing detection function, and zero-crossing detection method
A drive circuit with a zero-crossing detection function, and a zero-crossing detection method. The drive circuit comprises: a power switch transistor, a pull-up drive transistor, a first pull-down drive transistor and a second pull-down drive transistor. When an inductor starts to discharge, the first pull-down current and the second pull-down current jointly pull down a gate terminal of the power switch transistor, such that the power switch transistor is in a cut-off state; after a set time, the first pull-down current is turned off; and when the inductor ends discharging, a parasitic capacitance of the power switch transistor couples with the drop signal, and when the drop signal is detected, the pull-up current pulls up the gate terminal of the power switch transistor, such that the power switch transistor is in a turn-on state.
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
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
61.
Discharge circuit integrated in chip of slave device to follow bus rectifier bridge
A discharge circuit integrated in a chip of a slave device to follow a bus rectifier bridge includes: a digital control module for generating, when an output result of a comparator is that a bus voltage falls, a high-level and time-configurable pulse width to drive a discharge circuit to discharge a bus; a discharge current source module for enabling the discharge of the bus by means of a digital control module and adjusting a discharge current; a comparator for obtaining a status of a change in the bus voltage; and a peripheral circuit for monitoring the change in the bus voltage, providing to the comparator a voltage signal which reflects divided bus voltage fall information, and generating a comparison reference voltage.
A circuit structure for efficiently demodulating an FSK signal in a wireless charging device, comprising a data sampling module, a period point counting module, a data distribution module, and a period point processing module. An input terminal of the period point counting module is connected to an output terminal of the data sampling module; an input terminal of the data distribution module is connected to an output terminal of the period point counting module; and an input terminal of the period point processing module is connected to an output terminal of the data distribution module.
H04L 27/144 - Circuits de démodulationCircuits récepteurs avec démodulation utilisant les propriétés spectrales du signal reçu, p. ex. en utilisant des éléments sélectifs de la fréquence ou sensibles à la fréquence
H04L 27/156 - Circuits de démodulationCircuits récepteurs avec démodulation utilisant les propriétés temporelles du signal reçu, p. ex. détectant la largeur de l'impulsion
H04J 3/04 - Distributeurs combinés avec des modulateurs ou des démodulateurs
H02J 7/02 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries pour la charge des batteries par réseaux à courant alternatif au moyen de convertisseurs
H04B 5/00 - Systèmes de transmission en champ proche, p. ex. systèmes à transmission capacitive ou inductive
H04L 27/148 - Circuits de démodulationCircuits récepteurs avec démodulation utilisant les propriétés spectrales du signal reçu, p. ex. en utilisant des éléments sélectifs de la fréquence ou sensibles à la fréquence utilisant des filtres, y compris des filtres du type PLL
63.
Method for demodulating frequency modulated signal of PMA standard wireless charging device
The present disclosure relates to a method for demodulating a frequency modulated signal of a PMA standard wireless charging device, including: (1) reading coil signals, sampling the coil signals, and counting cycles; (2) extracting a frequency change according to a change in a cycle count; (3) determining data according to the frequency change and a frequency duration and outputting the data; and (4) splicing the outputted data. With the method, a demodulation part does not require a complex analog circuit, and the highest frequency desired at a digital circuit part is only 4 MHz. Moreover, at this frequency, there is only a simple addition operation, and the main operating frequency is below 236 KHz.
H04L 27/14 - Circuits de démodulationCircuits récepteurs
H04L 27/148 - Circuits de démodulationCircuits récepteurs avec démodulation utilisant les propriétés spectrales du signal reçu, p. ex. en utilisant des éléments sélectifs de la fréquence ou sensibles à la fréquence utilisant des filtres, y compris des filtres du type PLL
H04B 5/00 - Systèmes de transmission en champ proche, p. ex. systèmes à transmission capacitive ou inductive
H04L 27/16 - Dispositifs de régulation de fréquence
64.
LED driving circuit and method for balancing efficiency and power factor
A LED driving circuit and method for balancing efficiency and a power factor. The circuit comprises a voltage input module, an LED load, a constant current control module and a current turn-off slope control module for adjusting the turn-off slope of the current flowing through the LED load, such that a compromise between efficiency and power factor is achieved. When an input voltage is higher than a setting voltage, the current flowing through the LED load is turned off, such that the power consumption is reduced; in addition, the efficiency and power factor are balanced by adjusting the turn-off slope of the current. According to the present invention, a compensation capacitor is used to control the average current in an alternating current period and to limit peak current, thereby implementing constant power output within a wide range of input voltage.
A single-segment linear constant-power LED driving circuit and method. The circuit comprises: a voltage input module, an LED load, a power switch tube, a sampling resistor, an over-voltage control module for detecting the voltage at a drain terminal of the power switch tube, a current control module for limiting a peak current of the LED load, and a comparison module. When an input voltage is greater than a turn-on voltage of the LED load, the current control module limits the peak current so that the current average value in different input voltage periods is constant. When the input voltage is greater than a set value, current flowing through the LED load is turned off, thereby reducing power consumption. When the input voltage is less than the turn-on voltage of the LED load, the LED load is turned off.
A system and method for detecting voltage of a battery pack. The system comprises a level transfer circuit array, a multipath data selector, a decoder, a trimming calibration circuit, and an output buffer. The decoder is configured to parse a battery pack cell gating signal; the level transfer circuit array is configured to convert a gated battery pack cell voltage into a common grounded voltage; the multipath data selector is configured to transmit the common grounded voltage, which is converted by the level transfer circuit array, of a battery pack cell to the trimming calibration circuit; the trimming calibration circuit is configured to correct the received common grounded voltage of the battery pack cell; and the output buffer is configured to buffer the common grounded voltage, which is trimmed and calibrated by the trimming calibration circuit, of the battery pack cell.
G01R 19/00 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
G01R 31/3835 - Dispositions pour la surveillance de variables des batteries ou des accumulateurs, p. ex. état de charge ne faisant intervenir que des mesures de tension
67.
Circuit structure for achieving adaptive function in class-D audio power amplifier circuit
Disclosed is a circuit structure for implementing an adaptive function in a class-D audio power amplifier circuit, comprising an operation amplifier, a pulse width modulator and a driver stage that are sequentially and serially connected, an input terminal of the operation amplifier being connected to an external audio signal output terminal, and an output terminal of the driver stage being connected to a loudspeaker and connected to the input terminal of the operation amplifier via a feedback loop. The circuit structure further comprises: one or a plurality of a carrier adaptive circuit, a frequency adaptive circuit, a driver adaptive circuit, a temperature adaptive circuit.
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