30 results about "Equivalent input" patented technology

The invention discloses a single-port detection resonator resonant frequency on-line real-time measurement system for an MEMS gyroscope, and the system comprises a closed-loop drive circuit which is used for driving a resonator to resonate and outputting a drive detection signal; the first C / V conversion circuit converts the current into a detection voltage signal, and the on-off of the first C / V conversion circuit and the negative resistance circuit is controlled by a voltage control switch; the negative resistance circuit enables the equivalent input resistance of the first C / V conversion circuit to be a negative value so as to generate positive damping feedback force on the detection resonator; the multiplier is used for carrying out multiplication demodulation on the detection voltage signal and the driving detection signal, and the angular velocity of the MEMS gyroscope is output after the signals are filtered by the low-pass filter; the upper computer controls the on-off of the voltage control switch, the frequency fd and the frequency fs are calculated through fast Fourier transform by driving the detection signal and the detection voltage signal respectively, the frequency difference is obtained by solving the difference, and the resonant frequency of the single-port detection resonator is measured on the premise that the work of the MEMS gyroscope is not affected.

The invention provides a current multiplexing type output amplifier. The current multiplexing type output amplifier comprises a current multiplexing type input stage, a first self-biased diode pair, a second self-biased diode pair, a first AB type output stage and a second AB type output stage, wherein the first self-biased diode pair and the second self-biased diode pair are connected with the current multiplexing type input stage; the first AB type output stage is connected with the first self-biased diode pair; according to the invention, two self-biased diode pairs are adopted to replace a floating voltage source in the prior art. When a large pulse signal is input, one diode in each of the two diode pairs is in a cut-off state, transient change current I only flows into or out of the output end from a certain branch, and compared with a traditional amplifier, the slew rate is multiplied under the same bias current condition. In addition, the input stage adopts a current multiplexing type architecture combining a PMOS (P-channel Metal Oxide Semiconductor) and an NMOS (N-channel Metal Oxide Semiconductor), under the same bias current, the equivalent input transconductance is the sum of the transconductance of the PMOS and the transconductance of the NMOS, and the unity gain bandwidth is also multiplied.

The invention discloses a DC micro-grid power buffer safety control method and device aiming at FDI attack, and relates to the technical field of power electronics and power system control. The method comprises the steps of obtaining a block matrix of a DCmGs system node current equation according to the Kirchhoff's current law; adopting Kron simplification to eliminate internal node voltage, obtaining a relation between a port current vector and a voltage vector, and constructing a small signal model of the port voltage vector; based on a small signal model, a linear mapping relation about disturbance of bus voltage to equivalent input impedance of each power buffer is constructed, modeling and linearization are carried out on energy and adjustable input impedance of each power buffer, a network coupling small signal model is constructed, and a second-order high-gain observer is designed; and if the FDI attack exists in the DCmGs system, an anti-FDI attack elastic control law is designed, so that the closed-loop voltage in the DCmGs system and the energy of a power buffer are quickly converged, and buffeting is inhibited. By adopting the method, the DCmGs system can be prevented from buffeting in an unknown FDI attack scene.

An anti-interference control method for a permanent magnet synchronous motor driving system with output containing measurement noise comprises the following steps: when the permanent magnet synchronous motor driving system is disturbed and current is used as system output to have measurement noise, noise and disturbance suppression is realized through output filtering, an improved equivalent input interference method and control law optimization; the method specifically comprises the following steps: step 1, establishing a permanent magnet synchronous motor driving system state space model considering system state disturbance and output measurement noise; 2, introducing an output filtering strategy, transferring noisy output to a state equation, and combining a filter state and an original system state to form an extension system; 3, a traditional equivalent input interference method is improved, a parameter variable sliding mode observer is constructed to replace a state observer, and the equivalent input interference method is integrated to reduce observation errors; 4, designing a proportional-integral controller, and enabling the expansion system to output tracking reference current; and 5, constructing a Lyapunov function to perform stability analysis, and ensuring that all signals of the closed-loop system are consistent and finally bounded. According to the anti-interference control method for the permanent magnet synchronous motor driving system with the output containing the measurement noise, disturbance and noise are effectively suppressed, and the stability and the control precision of the permanent magnet synchronous motor driving system are improved.

The invention discloses a method, system and medium for a voltage clamping unit in a chip circuit, and belongs to the technical field of chip circuit protection, and the method comprises the steps: obtaining a maximum allowable voltage deviation window and a maximum allowable voltage rise rate of a target input / output pin of a chip, and constructing a target clamping characteristic parameter set; selecting a clamp sub-model based on the parameter set; adjusting capacitance matching unit parameters according to the equivalent input capacitance of the target pin by combining a support vector regression algorithm with a genetic algorithm; connecting a clamping model and injecting a test voltage waveform, and extracting clamping response time and clamping voltage to construct feedback characteristics; a mathematical model between the clamping response time and the delay gate series is generated through a symbol regression algorithm, and a control delay unit structure is corrected; according to the method, closed-loop adaptive adjustment of clamping parameters is realized, the transient interference suppression capability and clamping precision of the chip under high-frequency and low-voltage conditions are improved, and the method has good reliability and expandability.

This invention discloses a streaming computing engine system and method applicable to various scenarios, relating to the field of streaming computing technology. It includes: a mismatch assessment module for calculating the mismatch margin of the RF link based on the characteristic impedance of the RF transmission line, cable type tolerance, and the equivalent input impedance of the cellular module at the RF port; a thermal and humidity characteristic module for calculating the initial temperature difference of the metal plate penetrating the compartment in a metal control cabinet, and calculating the thermal conductivity enhancement ratio and moisture retention coefficient of the cold bridge in the condensation joint area on the metal plate penetrating the compartment; and a temperature compensation increment module for calculating the target compensation temperature increment of the metal plate penetrating the compartment based on the thermal conductivity enhancement ratio, moisture retention coefficient, and initial temperature difference of the cold bridge. This invention improves the accuracy of RF link health status determination.

An active probe disclosed by the present application comprises a first signal channel which comprises a first signal input end, a first attenuation module and a first signal output end, the first attenuation module is arranged between the first signal input end and the first signal output end, and the first signal input end accesses a first signal; the second signal channel comprises a second signal input end, a second attenuation module and a second signal output end, the second attenuation module is arranged between the second signal input end and the second signal output end, and a second signal is accessed to the second signal input end; and the capacitance compensation module is used for changing self capacitance based on setting, adjusting the overall equivalent input capacitance of the first signal channel, and / or adjusting the overall equivalent input capacitance of the second signal channel. According to the technical scheme, the capacitance compensation module can change the self capacitance based on setting, so that the overall equivalent input capacitance of the first signal channel is matched with the overall equivalent input capacitance of the second signal channel, and the problem of signal distortion can be solved.

The invention discloses a compensation loop circuit for suppressing optocoupler thermally induced gain attenuation. The compensation loop circuit comprises a voltage reference module, an optocoupler isolation module and an optocoupler input end current-limiting resistor module. In order to solve the problem of loop gain attenuation caused by the negative temperature characteristic of the current transmission ratio in a traditional optocoupler isolation compensation network, a current-limiting resistor at the input end of an optocoupler is reconstructed into a series structure and is connected with an NTC thermistor in parallel to form a temperature self-adaptive bias network, and the network can automatically reduce the equivalent input resistance of the optocoupler along with the rise of the temperature, so that the gain of the loop is reduced. The loop gain attenuation is compensated in real time, and the left shift of the crossing frequency is inhibited. According to the invention, effective compensation for the negative temperature characteristic of the current transmission ratio of the optocoupler is realized through a pure analog circuit structure, the ride-through frequency deviation of the system is effectively inhibited in a wide temperature range of 25-105 DEG C, and the gain stability and dynamic response performance of the power supply in a severe temperature environment are remarkably improved; and meanwhile, the conciseness and reliability of the traditional scheme are kept.

The application provides a true rail-to-rail input and output reference voltage buffer circuit suitable for high-precision ADC, which alternately performs a sampling phase F1 and a holding phase F2 during operation; the circuit comprises a sampling capacitor C s During the sampling phase F1, the bottom plate tracks the input reference voltage, and the top plate is reset to the ground; a level shift capacitor C LVL During the sampling phase F1, the difference between the input reference voltage and the output common-mode voltage of a transconductance operational amplifier (OTA) is synchronously sampled, and during the holding phase F2, the output voltage is connected to the output end of the transconductance operational amplifier (OTA), so as to realize the expansion of the true rail-to-rail range of the output voltage; a feedback capacitor C f During the sampling phase F1, the charge is not cleared, and during the holding phase F2, the sampling capacitor C s is connected in parallel, and the output voltage is established through charge averaging; the switch network is used for controlling the connection state of the capacitors in the sampling phase F1 and the holding phase F2. The application embodiment can realize true rail-to-rail input and output and high effective input impedance.

The invention discloses a method for realizing full-bridge-half-bridge seamless switching of an LLC resonant converter based on hybrid modulation, and aims to solve the problems of resonant cavity energy abrupt change, output voltage fluctuation and resonant current impact caused by the difference of equivalent input voltage gain ratios of full-bridge (FB for short) and half-bridge (Half-bridge (HB for short) modes during topological switching of the LLC resonant converter. And meanwhile, the problems that the switching working frequency matching precision is low and the system is difficult to quickly enter a steady state due to lack of an FB and HB unified time domain model are solved, so that stable and efficient operation of the LLC resonant converter in a wide voltage gain range is realized. Meanwhile, according to the control method, the gain-frequency relation is solved in real time by constructing a time domain model with unified FB and HB modes, and continuous energy transition of the resonant cavity is guided in combination with hybrid modulation seamless switching control, so that the voltage gain adjustment range can be widened without introducing extra hardware, and the parameter adaptability and operation robustness of the control system are improved.

The application discloses a method for improving transient stability of a network-forming converter in an islanded alternating-current microgrid, and the method comprises the following steps: building a spatial model of the islanded alternating-current microgrid based on a model predictive control strategy, and adding an additional adjustment term in a Q-V loop of a virtual synchronous generator control mode; when a grid-connected converter generates a frequency deviation due to a fault of the microgrid, an electromagnetic torque target function minimization method is used to rollingly optimize the additional adjustment term in the Q-V loop according to angular frequency data at each moment, so that an equivalent input torque and an output torque of the network-forming converter are balanced, and thus the stability of the network-forming converter is restored. The application can effectively reduce the frequency deviation and system oscillation after the fault, significantly shorten the system recovery time, and improve the operation reliability and stability of the microgrid.

This application relates to an operational amplifier circuit, an op-amp chip, and an electronic device. At the first input differential pair of the first differential input circuit, a first auxiliary differential pair of the same type but with a proportionally reduced switching transistor size is connected in parallel. The gates of the first auxiliary differential pair are connected to a first differential voltage adjustment circuit, which is configured to adjust the output voltage. When voltage offset occurs in the operational amplifier circuit, the calibration voltage between the output and the gates of the first auxiliary differential pair is adjusted to create a gate-source voltage difference, causing current imbalance between the first auxiliary differential pairs. An equivalent input offset compensation voltage is introduced into the input stage through this imbalance current. This input offset compensation voltage has the opposite polarity and direction to the offset voltage, thereby canceling out the offset voltage and achieving offset calibration. This approach achieves high op-amp offset voltage calibration accuracy while maintaining hardware cost.

The invention provides a passive direct-current voltage sensor which is powered by a tested direct-current high voltage and comprises a voltage division circuit, an input end of which is coupled with the tested direct-current high voltage and is used for converting the direct-current high voltage into a low-voltage signal in proportion; the equivalent resistance value of the non-linear correction circuit is reduced along with the reduction of the voltage at the two ends, and the non-linear correction circuit is used for compensating the overall equivalent input impedance of the voltage division circuit and the modulation circuit during small voltage input; the load compensation circuit is used for compensating the subsequent modulation circuit when the load changes and stabilizing the output voltage; the modulation circuit is used for linearly converting a signal of the load compensation circuit into an alternating current signal and is internally provided with a high-frequency transformer for realizing electrical isolation; the demodulation filter circuit is used for rectifying and filtering the alternating-current signal into a direct-current low-voltage output signal which is in fixed proportion to the detected direct-current high voltage; and heat-conducting insulating glue is filled between the radiator and the divider resistor and is used for enhancing heat dissipation and insulation. The technical problems that accurate monitoring of weak voltage changes is not enough, and the space occupation amount of the voltage division circuit is large are solved.

The application discloses a kind of composite broadband microvibration energy acquisition adaptive power management and power supply circuit system, comprising: transducer signal separation acquisition module, makes piezoelectric and electromagnetic two-way signal from source physical isolation;First, second impedance matching rectifier module, extract band energy characteristics from respective rectification output ripple, dynamically adjust equivalent input impedance in feedforward mode;Power fusion module, by controlled MOSFET realizes the one-way low-loss merging of two-way direct current power;Hybrid energy storage and charging path scheduling module, according to bus power level automatically switches between sequencing charging state;Transient power distribution and load state detection module, to pure hardware timing distinguishes network matching load current transient characteristics, realizes power supply trigger and shutdown.The application makes impedance matching response and vibration spectrum change synchronous, avoids double-source cross interference and energy storage boundary oscillation, is independent of digital protocol, realizes the autonomous perception and precision power distribution of load task.

The invention discloses a low-noise sampling hold circuit for a successive approximation type ADC and a sampling hold method of the low-noise sampling hold circuit, the low-noise sampling hold circuit comprises a noise elimination sampling circuit comprising a capacitance multiplication circuit, and the output end of the noise elimination sampling circuit is sequentially connected with a comparator, an SAR logic control circuit and a segmented resistor DAC. The input end of the noise elimination sampling circuit is connected with sampling voltage and output voltage of the segmented resistor DAC. Noise of a switch and an operational amplifier in the sampling hold circuit is effectively eliminated through charge sharing and a capacitance multiplication circuit, equivalent input noise at the front end of the ADC is remarkably reduced, the problem that low noise of the operational amplifier, bandwidth and power consumption are difficult to consider at the same time is solved, and complex low-noise design of a main path operational amplifier is avoided. According to the invention, the signal-to-noise ratio of the sampling hold circuit is greatly improved, the significant digits and quantization precision of an ADC system are improved, and the sampling hold circuit has the advantages of being simple in structure and easy to implement.

The application discloses a power synthesis circuit of a multi-path high-frequency power supply, which synthesizes n paths of input power through n groups of first-stage CV / CC networks and one group of second-stage CC / CV networks; specifically, when designing the two-stage CV / CC and CC / CV networks, the load impedance can be linearly changed to the equivalent input impedance of each power supply according to actual requirements, and the transformation can ensure that the power supply with high sensitivity to the load can also be power synthesized, thus, the power supply has good flexibility and can meet the power supply requirements under a high-frequency circuit.

The application provides a linear equalizer, an electronic circuit and an electronic device. In the linear equalizer, two ends of a first coupling capacitor are connected with a second differential input end and a first differential output end respectively, and two ends of a second coupling capacitor are connected with a first differential input end and a second differential output end respectively. Therefore, a first differential amplifier, the first coupling capacitor and the second coupling capacitor form an active inductor structure. On this basis, the active inductor module assists a T-shaped coil matching module, so that the equivalent input capacitance of the first differential amplifier decreases with the increase of the first differential input signal, thereby increasing the gain of a high frequency band in the T-shaped coil matching module and the working bandwidth of the T-shaped coil matching module. In addition, the matching type of the T-shaped coil matching module has high tolerance to loads and does not introduce additional nonlinearity, so that the process deviation of the T-shaped coil matching module is small, thereby improving the process stability of the linear equalizer.

This invention discloses a method, system, and medium for a voltage clamping unit in a chip circuit, belonging to the field of chip circuit protection technology. The method involves obtaining the maximum allowable voltage deviation window and maximum allowable voltage rise rate of the target input / output pin of the chip, constructing a target clamping feature parameter set; selecting a clamping sub-model based on this parameter set; adjusting the capacitor matching unit parameters according to the equivalent input capacitance of the target pin using a combination of support vector regression and genetic algorithm; connecting the clamping model and injecting a test voltage waveform to extract the clamping response time and clamping voltage to construct feedback features; and then generating a mathematical model between the clamping response time and the delay gate series using a symbolic regression algorithm to correct the control delay unit structure. This method achieves closed-loop adaptive adjustment of the clamping parameters, improving the chip's transient interference suppression capability and clamping accuracy under high-frequency and low-voltage conditions, and exhibiting good reliability and scalability.

The invention discloses a method, a device and equipment for calibrating a streamline successive approximation type analog-to-digital converter, relates to the technical field of analog-to-digital converters, and aims to solve the problems that the conventional method for calibrating the streamline successive approximation type analog-to-digital converter is limited by a specific architecture and needs an additional circuit or algorithm. The method comprises the following steps of: obtaining basic data of a Pipelined-SAR ADC (Synthetic Aperture Radar Analog to Digital Converter) to be calibrated; generating a transmission curve of the first-stage MDAC according to the equivalent input signal and the equivalent output signal; determining a jump amplitude and a jump type corresponding to each capacitor weight position; and calculating the mismatch value of each capacitor according to the jump amplitude, the jump type and the capacitor weight corresponding to each capacitor weight position. Calibration is made based on the mismatch value. The calibration method for the streamline successive approximation type analog-to-digital converter is suitable for calibration of streamline successive approximation type analog-to-digital converters of different architectures, and extra circuits or algorithms are not needed.

The invention relates to a method for suppressing measurement noise of a permanent magnet synchronous motor based on PIO-EID and a continuous terminal sliding mode, and belongs to the technical field of motor control. The method comprises the following steps: designing an equivalent input interference estimator based on a proportional-integral observer, smoothing a rotating speed signal containing noise by utilizing an integral state in the observer, and reconstructing equivalent input interference; a continuous terminal sliding mode controller based on model compensation is designed based on a rotating speed observation value and an interference estimation value, a medium sliding mode control law comprises a model compensation item to offset system nominal dynamic by utilizing known model information, a sliding mode surface adopts a nonlinear function form, and the continuous control law can effectively weaken buffeting. According to the method, high-frequency measurement noise is suppressed at the source by using the integral characteristic of PIO, the sliding mode gain is greatly reduced by using EID feedforward compensation, and the finite time convergence characteristic of CTSMC is combined, so that the high-precision control of the system is realized while the strong anti-interference capability of the system is ensured.

This invention provides a method and apparatus for identifying parameters of a power system node frequency response model, relating to the field of data processing technology. The method includes: acquiring operational data of multiple nodes in a power system under stable operating conditions; constructing an independent disturbance estimation sequence for each of the multiple nodes based on the operational data; wherein the independent disturbance estimation sequence is obtained by minimizing the residual correlation between different nodes; constructing an equivalent input correlation function and an output correlation function for identifying the node frequency response model based on the independent disturbance estimation sequence; establishing an optimization objective function for identifying the parameters of the node frequency response model based on the equivalent input correlation function and the output correlation function; and solving for the parameters of the node frequency response model based on the optimization objective function. The method provided by this invention achieves accurate modeling of the dynamic frequency characteristics of the system without relying on external excitation.

This invention relates to the field of integrated circuit technology and provides a comparator and analog-to-digital converter based on a pre-amplification stage structure. The comparator includes: a first pre-amplification stage, whose input terminal is connected to a differential input signal, amplifying the differential input signal and outputting a first differential output signal; a second pre-amplification stage, whose input terminal is connected to the first differential output signal, amplifying the first differential output signal and outputting a second differential output signal, and a positive feedback unit is provided between its output terminal and its input terminal to improve the voltage gain of the second pre-amplification stage; and a latch, whose input terminal is connected to the second differential output signal. By improving the voltage gain of the second pre-amplification stage through the positive feedback unit, especially improving the voltage gain of small signals, the equivalent input noise of the comparator can be effectively reduced.

The invention discloses a gm-TIA type continuous time linear equalization circuit and device, and relates to the technical field of communication circuits, the gm-TIA type continuous time linear equalization circuit comprises a gain amplification circuit, a coupling inductance circuit and a transimpedance amplification circuit, the gain amplification circuit is connected with an input voltage signal and is used for carrying out gain amplification on the input voltage signal, and the coupling inductance circuit is connected with the transimpedance amplification circuit; the coupling inductance circuit is connected with the gain circuit and used for widening the transmission bandwidth of an input voltage signal subjected to gain amplification, and the transimpedance amplification circuit is connected with the coupling inductance circuit and used for transimpedance amplification output of the input voltage signal subjected to transmission bandwidth widening. Through the coupling inductance circuit, the parasitic capacitance of the gain-amplified input voltage signal is reduced, the signal transmission bandwidth is widened, the equivalent input capacitance can be effectively reduced, the high-frequency response can be optimized, the driving capability of the CTLE circuit is improved, signal transmission attenuation and distortion are avoided, and the integrity of signal transmission is ensured.

This application relates to the field of semiconductor device parameter testing technology, and discloses a semiconductor low-frequency noise measurement system adaptable to multiple types of devices, comprising a hardware measurement and software analysis subsystem. The hardware measurement subsystem includes a low-noise power supply and bias module, a dual-path device adapter, a multi-channel synchronous acquisition module, and a hierarchical adaptive preamplifier. The system superimposes a high-frequency perturbation sensing signal onto the measurement link, extracts feedback parameters to calculate the equivalent input impedance, quantizes the physical pole frequency, drives a controlled analog switch matrix to generate controlled physical zeros, and cancels additional low-pass poles caused by impedance mismatch. The dual-path device adapter synchronously extracts the mixed signal of the test channel and the common-mode leakage signal of the reference channel; the software analysis and control module reconstructs the transfer function, uses coherence coefficients to dynamically weight and fuse the physical prior and data-driven model, performs coherent subtraction and full-link inversion compensation in the complex frequency domain, and outputs a clean equivalent noise voltage spectral density sequence.

This application discloses a supercapacitor SOC estimation method and system based on switching adaptive Kalman filtering, relating to the field of supercapacitor SOC estimation. The method includes acquiring the supercapacitor's terminal voltage and main circuit current, and obtaining the current equalization circuit state; constructing an equivalent input current, selecting the discrete-time model and process noise covariance matrix corresponding to the current mode, and using the equivalent input current for state prediction and covariance prediction; selecting the discrete-time model and measurement noise covariance matrix corresponding to the current mode, and using the terminal voltage for state correction and error covariance update to obtain the current SOC estimate; updating the measurement noise covariance matrix and process noise covariance matrix for SOC estimation at the next time step. This solves the model mismatch problem caused by the equalization process and the filter gain mismatch problem caused by unknown noise statistical characteristics and mode-dependent changes in existing technologies, achieving accurate SOC estimation during the equalization switching process.

This application provides a constant power multi-relay wireless power transmission system based on equivalent impedance regulation. It addresses the problem of existing multi-relay WPT systems experiencing resonant matching issues due to drastic temperature fluctuations caused by external air temperature variations. The system includes a transmitting unit, a receiving unit, and a frequency controller, as well as at least one relay unit positioned between the transmitting and receiving units. The transmitting unit comprises a DC power supply, a high-frequency inverter, a primary-side compensation circuit, and a transmitting coil connected in sequence. The frequency controller calculates the input impedance and impedance angle based on the inverter output voltage and current, and controls the system frequency. This application dynamically maintains the overall equivalent input impedance of the system at a target constant value, thereby effectively ensuring stable constant power output even in complex external environments.

The invention relates to a low-power-consumption and high-dynamic-range integrator suitable for a Delta-Sigma modulator, and belongs to the field of integrated circuit design. The integrator specially sets an equivalent thermal noise compression mode B for a small-amplitude input signal on the basis of a traditional integrator. Under a large-amplitude input signal, an integrator is set to be in a traditional mode A; under a small-amplitude input signal, the integrator is set to be in an equivalent thermal noise compression mode B; in the mode B, signal sampling is multiplied by performing bidirectional sampling on an input signal, but introduced noise is not multiplied compared with that in a traditional mode generally, and then the integral state of the integrator and the integral gain of the signal are not changed by doubling the integrating capacitor, so that the integral gain of the signal is not changed. The integrator does not cause system faults in the application occasion of the Delta-Sigma modulator, compared with a traditional integrator, the output or equivalent input noise power of the integrator is compressed to 1 / 4 of the original noise power, and the dynamic range of the integrator is widened by 6dB on the premise that the power consumption overhead of the integrator is not increased.

This application discloses a circuit and method for adjusting the offset voltage of an operational amplifier. The circuit includes a differential input module with a first input branch and a second input branch, respectively for receiving a non-inverting input signal and an inverting input signal; an input adjustment module connected to both the first and second input branches, used to introduce adjustable adjustment voltages into the first and second input branches to adjust the equivalent input potentials of the first and second input branches; and a bias current generation module for generating a bias current and providing operating current to the input adjustment module. The adjustment voltages introduced by the input adjustment module into the first and second input branches are both formed based on a reference node A. By selecting an adjustment state, the equivalent input potentials of the first and second input branches are made consistent, thereby compensating for the input offset voltage of the operational amplifier.

The invention discloses a wireless power transmission control method and device based on deep learning. According to the method, the changed mutual inductance value and the changed load resistance value are effectively predicted through the pre-trained two-stage residual neural network model, and meanwhile, the optimal equivalent load resistance value and the optimal equivalent alternating-current voltage which give consideration to high efficiency and are changed are found through the pre-established dynamic optimal impedance matching curved surface; the closed-loop control of the equivalent load resistance is realized by controlling the duty ratio of the secondary Buck-Boost boost-buck circuit, and the closed-loop control of the equivalent input voltage is realized by controlling the duty ratio of the primary Buck-Boost boost-buck circuit, so that the constant power output of the whole system is efficiently realized within a preset error range.

According to the offset-noise hybrid storage high-precision comparator based on the strong positive feedback type operational amplifier, equivalent input noise and equivalent offset voltage are reduced through an offset storage stage and pre-stage amplification, the equivalent input noise of the comparator is reduced by adopting the strong positive feedback type operational amplifier, and the response speed is increased; when the comparator is used for the successive approximation analog-to-digital converter, the comparator carries out voltage comparison through cooperation with the preceding-stage capacitor array and the logic circuit; according to the invention, the problems of overhigh equivalent input noise, overhigh equivalent offset voltage and low response speed of a traditional comparator can be solved; the comparator provided by the invention can realize high-precision comparison at medium and high speeds, has wide application prospects in the fields of high-precision analog-to-digital converters, detection circuits and the like, and can also be applied to any other circuits needing voltage comparison.