697 results about "Simple circuit" patented technology

The invention provides an acquisition circuit, a temperature acquisition method, a circuit system and electronic equipment. The acquisition circuit comprises a first signal acquisition port, a plurality of second signal acquisition ports, a first acquisition unit and a plurality of second acquisition units. Wherein the first acquisition unit comprises a value taking resistor and a first pull-up resistor, the first pull-up resistor is located in the chip, a first reference voltage is connected to a first end of the first pull-up resistor, and a second end of the first pull-up resistor is connected with a first end of the value taking resistor through a first signal acquisition port; the second acquisition unit comprises a second pull-up resistor and a thermistor, the second pull-up resistor is located in the chip, the first end of the second pull-up resistor is connected with the first reference voltage, and the second end of the second pull-up resistor is connected with the first end of the thermistor through a second signal acquisition port. Therefore, the acquisition circuit can realize voltage acquisition of one end of the thermistor by using a simple circuit, so that the acquisition circuit is low in cost and simple in wiring design.

To implement a single-exposure HDR function with a simple circuit configuration without increasing noise.An imaging device includes: a first comparison circuit that outputs a first signal according to a result of comparison between signal levels of a first input signal and a first reference signal corresponding to a first gain; a second comparison circuit that outputs a second signal according to a result of comparison between a second input signal and a second reference signal corresponding to a second gain having an amount of gain different from that of the first gain; and a third comparison circuit that outputs a third signal according to a result of comparison between signal levels of the first signal and the first input signal, and a fourth signal according to a result of comparison between the second signal and the second input signal, at timings different from each other.

The invention discloses a SiC MOSFET junction temperature on-line monitoring circuit system based on a grid peak current method, which is connected with a SiC MOSFET to be detected for junction temperature monitoring, and comprises an FPGA, a digital driving circuit, a di / dt detection circuit, a peak current acquisition circuit and a sampling resistor, and the FPGA is connected with an output end of a PWM input signal; the FPGA dynamically adjusts the driving logic of the digital driving circuit by receiving a trigger signal of the di / dt detection circuit and a PWM input signal, and after effective output data of the peak acquisition circuit is obtained, a junction temperature data processing module in the FPGA analyzes and processes the data in real time, and finally outputs junction temperature information of the SiC MOSFET device. The junction temperature monitoring circuit has the advantages of high junction temperature monitoring sensitivity, strong anti-interference capability, simple circuit structure and the like.

The invention discloses a fan speed regulation circuit, including a feedback circuit for obtaining the motor temperature and adjusting the fan enable signal and then outputting it; a compensation circuit 1 for obtaining the fan enable signal and the fan speed and then outputting a level signal after comparison; and a compensation circuit 2 for obtaining the level signal and adjusting the fan speed. The invention realizes dynamic regulation, does not occupy DSP resources, uses a PWM control chip to adjust the fan PWM control signal, and then achieves the purpose of speed regulation, has a simple circuit, and requires fewer power devices; has a high switching frequency, is easy to be continuous in current, has fewer harmonics, and has relatively small losses and heat generation; has good low-speed performance, high steady-speed accuracy, and a wide speed regulation range; the power switch device works in a switching state, has a small conduction loss, and when the switching frequency is appropriate, the switching loss is also small, so the efficiency is high.

The invention discloses a heterogeneous high-speed parallel reading circuit for a storage and calculation array, which completes parallel reading processing of high-density storage and calculation array data through arraying, realizes various nonlinear operations through ANN and SNN mode distribution, and has the characteristics of simple circuit structure, small area, high layout matching, high data conversion consistency, low power consumption and the like. The single-row heterogeneous high-speed parallel reading circuit integrates an integrator, a comparator, a digital latch unit, an activation operation module, a pulse transmitting module and a time step latch unit, and the whole heterogeneous high-speed parallel reading circuit shares one set of synchronous time management module, counter module and bias. According to the invention, the working principle of a double-slope ADC is used for reference, the characteristic of multi-order conductance of a storage and calculation array is utilized, modules are combined and multiplexed through a time dimension quantization principle, data processing of two modes is realized, and the flexibility of a network architecture is increased on the basis of keeping simplification.

The invention discloses an ultrasonic non-transformer driving transducer circuit, which comprises a driving circuit, an isolation damping circuit, a receiving circuit and a transducer, and is characterized in that the driving circuit is connected with the transducer through the isolation damping circuit; the driving circuit comprises an ultrasonic chip, a resistor R2 and a capacitor C1, the resistor R2 is arranged between a DVS power supply end and a DV2 pin of the ultrasonic chip, and the capacitor C1 is connected between the resistor R2 and the DVS power supply end in parallel; the isolation damping circuit comprises a transistor, a resistor R1 and a capacitor C2, a collector electrode of the transistor is connected to a DV2 pin of the ultrasonic chip, an emitting electrode of the transistor is connected with the transducer, the resistor R1 is connected between a non-grounding end of the capacitor C1 and a base electrode of the transistor, and the capacitor C2 is connected between the emitting electrode and the base electrode of the transistor. According to the invention, through the driving circuit, the isolation damping circuit, the receiving circuit and the transducer, the functions of driving, isolation, damping, noise reduction and the like are realized through a simple circuit, and the problems of high voltage transformation cost, overlarge occupied space and the like are effectively solved.

The invention discloses a power battery active equalization control system based on SOC prediction, belongs to the technical field of battery management, and aims to solve the defect that the capacity fading of a battery pack cannot be fundamentally solved by a traditional voltage equalization strategy. According to the system, a dual-active half-bridge equalizer topology is adopted, a second-order RC equivalent circuit model and an FFRLS-EKF joint algorithm are combined to achieve high-precision SOC estimation, and the error is reduced by more than 20% compared with a traditional open-circuit voltage method; a phase shift and duty ratio combined control strategy is innovatively provided, the on-off state of an MOSFET and PWM signal parameters are adjusted in real time, the equalization current is cooperatively regulated and controlled, and the problem of pseudo equalization is solved. According to the method, the SOC of the battery pack can be quickly converged under the working conditions of standing, charging and discharging, the maximum deviation is reduced to 1.49% from 63.2%, the equalization efficiency is improved by more than 10%, and the method has the characteristics of simple circuit, efficient algorithm and strong expansibility, and is suitable for scenes such as a power battery system and an energy storage power station.

A current sensing apparatus, and a magnetic modulation method. The current sensing apparatus comprises: a magnetic core (110), wherein a conductor which carries a current signal under test passes through the magnetic core (110); a secondary coil (120), which is wound on the magnetic core (110); a sampling resistor (130), which is connected in series to the secondary coil (120), and is used for providing a sampling voltage signal which corresponds to an excitation current; an excitation control circuit (140), which is connected to the sampling resistor (130), and is used for generating a floating flip threshold signal on the basis of the sampling voltage signal, and outputting an excitation polarity signal on the basis of a comparison result of the sampling voltage signal with the floating flip threshold signal; and an excitation driving circuit (150), which is connected to the excitation control circuit (140) and the secondary coil (120), and is used for flipping the polarity of an excitation driving signal on the basis of the excitation polarity signal output by the excitation control circuit (140), such that the magnetic core (110) oscillates between a positive saturation point and a negative saturation point. The magnetic modulation effect in which the precision is high, the power consumption is low and a frequency response is good is obtained by means of a relatively simple circuit.

The utility model discloses an insulation resistance detection circuit and new energy equipment. The insulation resistance detection circuit comprises a first resistor, a second resistor, a first switch and a second switch, the first resistor and the first switch are connected in series to form a first detection branch, and the second resistor and the second switch are connected in series to form a second detection branch; the first detection branch and the second detection branch are connected in parallel and then are connected between a negative DC bus and a grounding wire or between a positive DC bus and the grounding wire. According to the insulation resistance detection circuit and the new energy equipment, the insulation resistance detection circuit is composed of the first resistor, the second resistor, the first switch and the second switch, the circuit structure is simple, the cost is low, and the ground insulation resistance of the equipment can be effectively detected.

The present application relates to the field of plasma generators and discloses a plasma generator and electronic device based on a single emitter head. The plasma generator includes: a power input terminal configured to receive an external power supply; a resonant trigger circuit coupled to the power input terminal, the resonant trigger circuit including a bidirectional trigger switch and an energy storage capacitor; a transformer, the primary winding of the transformer being connected in series with the bidirectional trigger switch and the energy storage capacitor in the resonant trigger circuit to form a primary loop, the transformer being used to generate resonance under the action of charging and discharging the energy storage capacitor and outputting a resonant peak through a secondary winding; a emitter head coupled to one end of the secondary winding via a coupler, the resonant peak being used to generate positive and negative ions through the emitter head; and an isolation device coupled between the primary and secondary windings of the transformer. The present application realizes the generation of positive and negative ions using a single emitter head, has a simple circuit structure, and effectively solves the problem of difficult assembly of dual emitters in traditional solutions.

The invention provides a voltage difference monitoring device and method for a bootstrap switching power supply and the switching power supply. The device comprises a voltage difference detection module which is configured to detect the voltage difference between the two ends of a bootstrap capacitor and generate a lower tube conduction indication signal if the voltage difference does not reach a set threshold value; the lower tube forced conduction module is configured to generate a plurality of continuous pulse signals according to the lower tube conduction indication signal so as to conduct a lower transistor when the pulse signals are in high level, so that the bootstrap capacitor is charged through the first power supply voltage until the voltage difference reaches a set threshold value; and the negative current detection module is configured to send a forced turn-off signal to the lower transistor forced turn-on module and end the turn-on period, corresponding to the current pulse signal, of the lower transistor if a negative current greater than a threshold value is detected during the period of turning on the lower transistor through the pulse signal. According to the invention, high differential pressure detection precision is realized through a simple circuit structure.

A time-interleaved ADC mismatch correction method and time-interleaved ADC relating to the technical field of integrated circuits are disclosed. The time-interleaved ADC mismatch correction method and time-interleaved ADC solve problems with high-order filter modules and signal overflow or saturation risks. The applied technical scheme uses time-interleaved ADC output signal(s) and a fitted signal to calculate a set of filtering coefficients, and uses this set of filtering coefficients to correct the ADC output signal in real time. The applied technical scheme compensates for differences in the frequency response of each channel, rather than the frequency response itself, and the filter order is smaller, the implementation is simpler, and the circuit design complexity and device cost are greatly reduced. The technical solution has a wide range of adaptability, can correct and improve broadband interleaving performance, and avoids the signal overflow / saturation risk because the compensation range is small.

The invention discloses a laser main control board performance test system and a test tool, and relates to the technical field of laser testing, and the system comprises a power supply simulation input circuit, an upper computer simulation control circuit, a light emitting simulation feedback circuit, a light emitting detection circuit and a signal processing circuit. The power supply simulation input circuit simulates the power supply input of a real laser, the upper computer simulation control circuit simulates and controls the upper computer of the real laser, and the light output simulation feedback circuit simulates the light output and feedback of the real laser, so that the to-be-tested main control board works. A light-emitting control signal is generated and post-processing is carried out based on a light-emitting feedback signal, then light-emitting power and an output power feedback signal of the simulation laser are collected through a light-emitting detection circuit, signal processing is carried out through a signal processing circuit, and a test result is obtained and displayed. According to the invention, the simulation laser is constructed based on the to-be-tested main control board and a simple circuit structure, so that the rapid performance of the main control board can be tested.

The invention provides a quartz crystal microbalance resonant frequency detection system, a control method and a terminal, a direct digital frequency synthesis excitation unit is adopted to generate a frequency sweep excitation signal with a preset frequency range and stepping, and the frequency sweep excitation signal is conditioned by a signal injection and conditioning unit and then injected into a QCM sensor. And then the pure amplitude response detection unit measures and quantifies voltage response amplitudes of the QCM sensor under different excitation frequencies, and the resonant frequency intelligent determination unit determines the resonant frequency of the QCM sensor according to the voltage response amplitudes. According to the invention, a QCM self-oscillation circuit does not need to be designed and debugged, a precise phase detection assembly does not need to be configured, the circuit board layout is simpler, and components are greatly reduced. The QCM resonant frequency can be accurately measured only through efficient amplitude detection, a complex algorithm is avoided, the operational capability requirement and the software development difficulty are reduced, the QCM resonant frequency measuring device has the advantages of being simple in structure, low in cost, easy to integrate and the like, miniaturization and low-power-consumption design can be easily achieved, and the QCM resonant frequency measuring device is suitable for portable and wearable application.

The invention discloses an inverter circuit topological structure for driving double three-phase motors, and belongs to the technical field of power generation, power transformation or power distribution. The topology comprises a six-phase bridge arm, a switching tube in the bridge arm is connected in series with a diode, and a branch after the switching tube is connected in series with the diode is inversely connected in parallel with a diode. A plurality of switching tubes and diodes of the topology are connected according to a specific rule, a reverse current path is blocked by serially connecting the diodes, and current mutation in the switching process is reduced; and meanwhile, an anti-parallel diode is used for maintaining a continuous current path, normal work of the circuit is ensured, and the circuit has the advantages of simple circuit design, low control cost, high efficiency and the like, and is widely applicable to low-voltage and high-current dual-three-phase motor driving scenes.

The invention provides an MCU network address automatic generation circuit supporting hot plug, which comprises a master control MCU, a plurality of nodes, a plurality of voltage measurement circuits, a plurality of equivalent resistors and a plurality of open-drain modules, the master control MCU end is in parallel connection with each node through a network interface connecting line, each node is in parallel connection with each equivalent resistor through an address line, and the open-drain modules are in parallel connection with the master control MCU end. The main control MCU comprises three ports, namely a port 1, a port 2 and a port 3, the port 1 and the port 2 are communication ports, the port 3 is an address generation control port and works in a push-pull output state, the port 1 of each node is connected to a voltage measurement function circuit, the port 2 of each node is connected to a voltage control port of an open-drain module, and the open-drain module is an NMOS (N-channel Metal Oxide Semiconductor) tube. According to the scheme, automatic generation of the network node address can be completed without manual participation, hot plugging is supported, the circuit structure is simple, the cost is low, and high expandability is achieved.

The invention discloses a three-phase alternating current charging pile before-charging output end short circuit detection circuit, which comprises a three-phase alternating current power supply circuit, a power connection circuit and a short circuit detection circuit, and is characterized in that the power connection circuit comprises a first current-limiting resistor, a second current-limiting resistor and a first detection relay; the short circuit detection circuit comprises a first isolation optocoupler, a second isolation optocoupler, a third isolation optocoupler, a third current-limiting resistor, a fourth current-limiting resistor, a fifth current-limiting resistor, a sixth current-limiting resistor, a seventh current-limiting resistor, an eighth current-limiting resistor, a second detection relay, a third detection relay and a first optocoupler output circuit. And a second optocoupler output circuit and a third optocoupler output circuit. The circuit is simple, the hardware cost is low, and whether the output end of the three-phase alternating current power supply circuit is short-circuited or not can be accurately detected; under the condition that any one or more of the three groups of detection relays fail, abnormal signals can be detected through the first, second and third detection points so as to judge whether the detection circuit fails or not and give an alarm.

The utility model provides a radio frequency power amplifier and a radio frequency chip. The radio frequency power amplifier comprises an amplifier, a first adjustable attenuation circuit, a second adjustable attenuation circuit and a first capacitor. Compared with the prior art, the first adjustable attenuation circuit and the second adjustable attenuation circuit are additionally arranged at the input end of the amplifier, input attenuation protection is achieved by adopting a simple circuit structure, the number of used devices is small, and the chip area cost can be effectively saved. Meanwhile, the input attenuation amount of the first adjustable attenuation circuit and the second adjustable attenuation circuit can be flexibly adjusted through a digital control bit and an analog control voltage, and free adjustment of different attenuation amounts at different temperatures is achieved; meanwhile, the input end of the amplifier is simple in structure, complex feedback loop control is avoided, the response speed is higher, and deterioration of the radio frequency performance of an amplifier channel is smaller.

The present invention discloses an H-bridge dimming and color temperature adjusting two-line output circuit and an LED dimming power supply. The H-bridge dimming and color temperature adjusting two-line output circuit includes a first signal generator U1, a second signal generator U2, a first switch transistor Q1, a second switch transistor Q2, a third switch transistor Q3, and a fourth switch transistor Q4. Through the above structure, it is possible to achieve two-line dimming and color temperature adjustment without distinguishing between positive and negative electrodes. The H-bridge dimming and color temperature adjusting two-line output circuit has the advantages of simple circuit connection, fewer devices, low cost, stable performance, and smooth dimming.

The invention provides a physical unclonable function (PUF) circuit based on XOR iteration and an operation method, and belongs to the field of physical unclonable function design. The circuit comprises a nonvolatile transistor array, and a peripheral register circuit, an XOR circuit and a readout comparison circuit, an XOR iterative operation is utilized to continuously perform XOR and iterative operations on an initially input challenge signal R [0] and R [1] through the nonvolatile transistor array and the peripheral register circuit and the XOR circuit to obtain an nth iterative result R [n + 1], a CRP generation process of the PUF is realized; according to the method, verification of the PUF can be completed through a single challenge signal, the complexity of PUF design is remarkably improved through multiple iteration processes, the PUF design has a reconfigurable function by repeatedly carrying out erasing operation on the transistor array and changing internal fingerprints of the PUF, the safety of machine learning resisting modeling of the PUF is improved, and the method has the advantages of being high in practicability and easy to popularize. The hardware cost and the power consumption overhead of the PUF are obviously reduced through simple circuit design and working steps.

The utility model provides a multifunctional mattress control device which comprises an interaction module used for a user to perform function selection; the power supply boosting module is used for boosting the working power supply; the control module is used for outputting a function control signal according to the function selected by the user and is connected with the interaction module and the voltage boosting module, and the power input end of the control module is connected with the first output end of the power boosting module; the signal transmission module is used for transmitting a function control signal and is connected with the control module; the low-voltage-resistant reset module is used for preventing the control module from resetting when the working voltage output by the power supply boosting module is lower than a preset value, and the low-voltage-resistant reset module is connected with the control module. The circuit is simple in design, convenient to operate and high in system stability, the user experience can be improved, the multifunctional requirement of a user is met, and meanwhile the cost is reduced. The utility model further provides a multifunctional mattress.

The invention relates to the technical field of rectifier bridges, in particular to a low-loss rectifier bridge circuit, which comprises a power supply AC1, a power supply AC2, a power supply cathode, a filter capacitor C1, two groups of high-end driving switches with the same structure and two groups of low-end driving switches with the same structure, the high-end driving switch comprises a transistor V1 and a transistor V4, the low-end driving switch comprises a transistor V2 and a transistor V3, the transistor V1 and the transistor V3 are connected with a power supply AC1, and the transistor V2 and the transistor V4 are connected with a power supply AC2. The rectifier bridge has the advantages that the voltage drop loss is reduced by about 50% compared with that of a pure diode rectifier bridge under the same condition; the rectifier bridge has an anti-backflow function, and can solve the problem of backflow current of a pure MOS tube rectifier bridge. Compared with a PMOS (P-channel Metal Oxide Semiconductor) tube, an NMOS (N-channel Metal Oxide Semiconductor) tube has the advantages of lower conduction impedance, low price, abundant model selection, simple circuit and low cost.

The invention relates to the field of true random number generation, and discloses a true random number generator based on a memristor and a generation method.The true random number generator comprises a biasing circuit, a current hunger type ring oscillator and a time-to-digital conversion circuit which are cascaded; the bias circuit comprises a memristor; the current hunger type ring oscillator comprises an inverter chain formed by cascading a plurality of current hunger type inverters. The invention solves the problems of poor randomness and high power consumption of true random numbers in the prior art, and has the characteristics of small occupied area, simple circuit structure and high generation rate.

The utility model relates to the technical field of memories, in particular to a word line selection circuit, a memory array and a flash memory, the word line selection circuit comprises: a replacement determination module, the first input end and the second input end of which respectively input the first flag bit information and the second flag bit information of a selected redundant word line; the first input end of the redundancy control module is connected with the output end of the replacement determination module, the second input end of the redundancy control module inputs the address of the operation word line, and the third input end of the redundancy control module inputs the replacement address of the selected redundancy word line; and the output end of the comparator is connected with the address decoding circuit of the storage array and the address decoding circuit of the redundant array and is used for outputting replacement selection signals. The word line selection circuit provided by the utility model can solve the problems of complex control logic in the existing redundancy replacement process and complex circuit structure for redundancy replacement, and has the advantages of simple circuit structure and control logic, quick response and accurate judgment.

The utility model belongs to the technical field of electronic circuits, and discloses a simple circuit capable of generating negative precision voltage reference and resisting high temperature of 200 DEG C. The simple circuit comprises a positive reference voltage source U1, a capacitor C1 and an operational amplifier U2, the output end of the positive reference voltage source U1 is connected to the inverted input end of the operational amplifier U2 through the isolation resistor R, the input end of the positive reference voltage source U1 is connected to a VCC power supply, and the GND pin of the positive reference voltage source U1 is connected to the output end of the operational amplifier U2; a pin 3 of the positive reference voltage source U1 is connected to a VCC power supply; a pin 3 of the positive input end of the operational amplifier U2 is grounded, and a pin 2 of the operational amplifier U2 is connected with a negative power supply; the two ends of the capacitor C1 are connected with the floating ground end of the positive reference voltage source U1 and the output end of the positive reference voltage source U1. According to the utility model, fewer components are used, and the precision is higher; the circuit has flexibility, and different negative precision voltage references can be generated by selecting different reference voltage sources and amplifier combinations; and the negative voltage reference generated by the module at the high temperature of 200 DEG C still has very good temperature stability.

The utility model discloses a high voltage resistant isolation serial interface circuit, comprising a modulation signal sending circuit, a modulation signal receiving circuit, a CPU1 and a CPU2, the input end of the modulation signal sending circuit is connected to the input end of the CPU1, the output end of the modulation signal sending circuit is connected to the input end of the modulation signal receiving circuit, and the output end of the modulation signal receiving circuit is connected to the input end of the CPU2. The output end of the modulation signal receiving circuit is connected to the signal input end of the modulation signal receiving circuit, and the output end of the modulation signal receiving circuit is connected to the signal end of the CPU 2. According to the high-voltage-resistant isolation serial interface circuit provided by the utility model, the circuit is relatively simple, and the highest withstand voltage can meet 15KV high-voltage isolation application; the maximum withstand voltage value can be adjusted by adopting various schemes, the high-voltage isolation application in a larger range can be met, and the practical flexibility is high.

The utility model provides a power-down holding circuit for a switching power supply, which relates to the technical field of switching circuits and comprises a thermistor RT2, a diode D1 and a plurality of electrolytic capacitor banks connected in parallel, and the thermistor RT2 is connected in series with the electrolytic capacitor banks after being connected in parallel with the diode D1. According to the utility model, the circuit structure is simple, and components are few; the impact current is effectively reduced by adopting the power-down holding circuit; and after the input power supply is cut off, the diode D1 is used for discharging the loop, so that the output delay power failure is realized. Meanwhile, by changing parameter matching and device type selection of the power-down holding circuit, different power-down holding time is achieved, the performance is reliable, and therefore the design cost is greatly reduced.

The utility model provides a charging device of a mining heavy truck power battery, the mining heavy truck power battery comprises a vehicle-mounted battery cluster and a DCDC corresponding to the battery cluster, the mining heavy truck power battery is connected with a mining truck load, the charging device comprises a rectifier bridge charging station and a liquid cooling charging gun, the rectifier bridge charging station is directly connected with an incoming line power supply and the liquid cooling charging gun, the incoming line power supply is converted into direct current through the rectifier bridge charging station, and the power battery of the heavy truck is charged through the liquid cooling charging gun. The adopted rectifier bridge charging station is simple in structure and simplified in circuit, DCDC is the existing equipment of the original truck, the cost is greatly reduced, the problem that more than 10 battery clusters and charging interfaces are needed between the original mining center truck and the charging station is solved, only 1-2 charging guns are used for connection, operation is easy and convenient, and the requirement for use under the field working condition is better met.

This invention provides an adaptive AGC control circuit and method for broadband RF front-ends. The circuit includes: a gain tuning circuit connected to the RF link of the broadband RF front-end; and a signal detection circuit connected to the gain tuning circuit. The signal detection circuit is used to sample the RF signal in the RF link of the broadband RF front-end through an ADC, and to perform signal processing and gain control on the sampled RF signal based on an FPGA, thereby controlling the gain tuning circuit. This invention uses an FPGA+ADC hardware solution to achieve real-time detection and closed-loop fast control to realize adaptive AGC control of the broadband RF front-end, which has the following characteristics: 1. Simple circuit structure, clear logic, and easy implementation; 2. Real-time signal acquisition and processing with low state control delay; 3. High accuracy of dual-threshold signal detection and discrimination; 4. Flexible and controllable gain, and wide applicability.

The present invention discloses a residual current protection test method, which belongs to the field of low-voltage electrical technology. A simulated residual current signal is input to a test coil on a residual current transformer, and the residual current protection function module is verified to be normal based on the response of the residual current protection function module to the simulated residual current signal; the simulated residual current signal is input according to the following method: an identical pulse signal is input at both ends of the test coil according to a time difference Δt, and the time difference Δt satisfies: t w ≤Δt≤T‑t w , t w , T represent the pulse width and pulse period of the pulse signal, respectively. The present invention also discloses a residual current protection test device and a circuit breaker. Compared to existing technologies, the present invention effectively eliminates the effect of residual magnetism on the measurement accuracy of the residual current transformer without requiring demagnetization during the test process. Furthermore, the present invention has a simple circuit structure, low implementation cost, and high reliability.