65 results about "Input offset voltage" patented technology

The invention discloses a low-output-ripple ultralow-offset-voltage operational amplifier and a working method thereof. The low-output-ripple ultralow-offset-voltage operational amplifier comprises a first chopper circuit, a first-stage operational amplifier additionally provided with an offset voltage adjusting circuit, a second chopper circuit, a notch filter, a second-stage operational amplifier and a third-stage operational amplifier which are sequentially connected. The offset voltage adjusting circuit trims the input offset voltage of the first-stage operational amplifier to hundreds of microvolts and then outputs the offset voltage to the second chopper circuit; the first chopper circuit and the second chopper circuit are used for modulating the offset voltage of the first-stage operational amplifier to a chopping frequency, and then the ripple voltage at the chopping frequency is filtered by the notch filter; the first-stage operational amplifier is designed to be a high-gain amplifier so as to restrain input offset voltage errors caused by the second-stage operational amplifier and the third-stage operational amplifier. According to the invention, low output ripple voltage and ultralow input offset voltage can be realized only by using the wave trap with a small area.

The invention discloses a foreground calibration circuit for an input offset voltage of an SAR ADC comparator. The foreground calibration circuit comprises a power supply input circuit, an input geminate transistor circuit, a latch comparator, an SAR successive approximation register and a Res DAC resistance voltage division type digital-to-analog converter. The output end of the power input circuit is electrically connected with the power end of the input geminate transistor circuit; an analog input signal VIN and a reference voltage signal VREF are input into the input end of the input geminate transistor circuit, and the output end of the input geminate transistor circuit is electrically connected with two input ends of the latch comparator; the two output ends of the latch comparator are electrically connected with the input end of the SAR successive approximation register, and the output end of the SAR successive approximation register is electrically connected with the input end of the Res DAC resistance voltage division type digital-to-analog converter; the output end of the Res DAC resistance voltage division type digital-to-analog converter outputs a CALIP signal and a CALIN signal to a grid electrode of an adjusting tube in the input geminate transistor circuit, so that the adjusting tube generates compensation current to compensate the current difference of two input geminate transistors in the input geminate transistor circuit, and offset voltage is calibrated.

The invention relates to an audio decoding output stage circuit and audio equipment, the audio decoding output stage circuit comprises an I / V conversion module and a low-pass filtering module, and the I / V conversion module comprises a conversion circuit, a crossed diamond amplification circuit, an overcurrent protection circuit and a Roche network circuit; the conversion circuit comprises a JFET (Junction Field Effect Transistor) audio operational amplifier chip and an I / V (Input / Output) conversion resistor and is used for converting an input current into an analog voltage signal; the crossed diamond amplifying circuit can reduce the input offset voltage; the over-current protection circuit can carry out over-current protection; the rowbell network circuit can prevent high-frequency self-oscillation of the power output stage; and the low-pass filtering module comprises a filtering circuit and an ultrahigh frequency filtering circuit arranged at the output end of the audio decoding output stage circuit. The scheme can bring high-performance sound performance, and has the advantages of lower distortion, higher conversion rate, low output impedance and large pushing current.

The present invention relates to an input offset voltage automatic correction circuit, the correction circuit includes a comparator circuit, a comparator circuit output drive tube, a switch control tube, and a logic control module; wherein the comparator circuit includes a first-level input and a second-level input, the correction circuit also includes a first-level input load and a second-level input load, the first-level input is connected to the first-level input load, the second-level input is connected to the second-level load, and the switch control tube controls the comparison circuit; the technical solution has a simple structure, and automatic correction can be achieved by adding conventional components. The circuit of the present invention will re-correct the input offset voltage every time it is powered on, eliminating the influence of the external environment on the input offset voltage, and the technical solution automatically reduces the input offset voltage of the comparator to a very low level.

This application relates to the field of operational amplifier circuit technology, and more particularly to an inverting operational amplifier circuit for eliminating input offset voltage. It includes an input resistor for receiving an input voltage; an operational amplifier for inverting and amplifying the input voltage; an output resistor section connected in series between the output terminal of the operational amplifier and the input resistor, the output resistor section being composed of multiple output resistors connected in series; multiple current sources connected to nodes between the various output resistors of the output resistor section, the current sources being used to compensate for the output offset voltage caused by the input offset voltage of the operational amplifier; and a digital code input section for adjusting the current values ​​of the current sources; wherein the voltage value of the output offset voltage is determined based on the current values ​​of the multiple current sources and the corresponding resistance values ​​of the output resistor section. Using this application is advantageous for canceling the output offset voltage caused by the input offset voltage of the operational amplifier and appearing at the output terminal.

This invention discloses a bandgap reference circuit structure, belonging to the field of integrated circuit design technology. The circuit structure includes a bandgap reference core circuit, a chopper-equipped operational amplifier (op-amp), a bandgap reference startup circuit, a temperature-to-absolute-temperature (PTAT) bias current source, and a current source startup circuit. By optimizing the bandgap reference core circuit architecture, combining chopper technology to eliminate the effects of offset voltage and device mismatch, and with the matching startup circuit and low-voltage-adaptive bias current source, the reference voltage is essentially independent of the op-amp input offset voltage, improving circuit symmetry performance and load dynamic response speed. Furthermore, in most common complementary metal-oxide-semiconductor (CMOS) processes, it only requires a power supply voltage of 2V or higher to operate stably, significantly improving the accuracy and stability of the reference voltage.

The present invention discloses a memristor simulator equivalent circuit, control method and electronic device, belonging to the technical field of circuit element simulators. The memristor simulator equivalent circuit provided by the present invention utilizes a combination of a multiplier and an operational amplifier to reproduce the characteristics of a memristor and replace the memristor for use. It not only supports long-term debugging and use, but also avoids the use of complex hardware circuit design and high device costs, and solves the problem of performance degradation under non-ideal conditions. By introducing an integrator composed of a second operational amplifier and an integrating capacitor, the dynamic characteristics of the memristor can be accurately simulated, ensuring the stability of the conductivity in the non-conducting state and reducing errors caused by the non-ideal characteristics of the operational amplifier (such as input offset voltage and input bias current); by providing a single-pole double-throw switch, the circuit can be flexibly switched between different operating modes, making it easy to adjust the circuit parameters according to actual application requirements, thereby optimizing the simulator performance.

To make a further investigation with regard to correcting of an input offset voltage of an auto-zero amplifier.SOLUTION: A signal amplifier circuit (X) is an auto-zero signal amplifier circuit includes a first amplifier (1) and a correction circuit (2x). The first amplifier (1) is configured to amplify an input signal (Vin). The correction circuit (2x) is configured to correct a first input offset voltage (Vofs1) of the first amplifier (1). The signal amplifier circuit (X) includes a correction control circuit (5) configured to detect a saturation state of an output signal (Vout) of the first amplifier (1) and to control the correction circuit (2x) to stop a correction operation of the first input offset voltage (Vofs1) of the first amplifier (1).SELECTED DRAWING: Figure 5

The invention relates to the technical field of operational amplification circuits, in particular to an inverted operational amplification circuit for eliminating input offset voltage. The input resistor is used for receiving an input voltage; the operational amplifier is used for outputting the input voltage after inverting amplification; the output resistor part is connected between the output end of the operational amplifier and the input resistor in series, and the output resistor part is formed by connecting a plurality of output resistors in series; a plurality of current sources respectively connected to nodes between output resistors of the output resistor unit, the current sources compensating an output offset voltage caused by an input offset voltage of the operational amplifier; the digital code input part is used for adjusting the current value of the current source; wherein the voltage value of the output offset voltage is determined according to the respective current values of the plurality of current sources and the resistance value corresponding to the output resistance part. According to the invention, the offset of the output offset voltage caused by the input offset voltage of the operational amplifier and appearing at the output end is facilitated.

The present invention discloses a comparator, a chip and an electronic device, wherein the comparator comprises: a pre-amplifier circuit, a latch circuit and a correction circuit, the correction circuit comprises a first correction unit, a storage unit and a second correction unit, the first correction unit is connected to the differential input end of the pre-amplifier circuit, the differential output end of the pre-amplifier circuit is connected to the differential input end of the latch circuit through the storage unit, and the second correction unit is connected to the differential input end of the latch circuit, wherein in the offset storage stage, the input offset voltage of the pre-amplifier circuit is stored in the storage unit through the first correction unit, and the input offset voltage of the latch circuit is stored in the storage unit through the second correction unit, so that in the signal comparison stage, the input offset voltage of the pre-amplifier circuit and the input offset voltage of the latch circuit are corrected by the voltage of the storage unit, thereby making the comparator have higher comparison accuracy.

The invention provides a current proportion mirror image circuit and an electronic product. The current proportion mirror image circuit comprises a current mirror module composed of a first transistor, a second transistor, a third transistor, a first capacitor, an operational amplifier and a mode switching unit; wherein the first ends of the first and second transistors are connected with working voltage, the control ends are connected with driving voltage, and the second end of the third transistor is connected with a CS end; the mode switching unit is used for switching an input signal of the operational amplifier and a control end signal of the third transistor based on different working modes; the second end of the third transistor outputs detection current having a preset proportion with the load current, and the second end of the second transistor is connected with a load; and the offset compensation module is used for sampling and compensating the input offset voltage of the operational amplifier. The offset compensation module is constructed by utilizing a self-zero-setting technology, so that the input offset voltage of the operational amplifier in the current mirror module is reduced, and the detection precision of the current proportion mirror circuit is improved.

The invention provides a temperature sensor, a circuit system and electronic equipment, and the system comprises a temperature voltage generation module which is used for temperature detection voltage; the temperature voltage comparator is used for comparing a first voltage and an analog voltage and outputting a comparison result signal, and the first voltage is equal to the sum of the temperature detection voltage and the input offset voltage of the temperature voltage comparator; the input offset voltage and the temperature detection voltage are both in direct proportion to the temperature to be detected, the load capacitance ratio of the input offset voltage and the temperature voltage comparator is in a logarithmic linear relation, and input geminate transistors in the temperature voltage comparator work in a sub-threshold region; the N-bit logic control module is used for outputting a corresponding temperature detection digital signal according to the comparison result signal; and the N-bit digital-to-analog conversion module is used for outputting a corresponding analog voltage according to the temperature detection digital signal, the temperature detection digital signal after N times of comparison is used for representing a first voltage, and the first voltage is used for representing the temperature to be detected.

The invention relates to a low-noise dynamic comparator based on imbalance self-calibration. According to the low-noise dynamic comparator, an improved imbalance self-calibration technology is introduced by integrating an improved imbalance calibration module based on a charge pump, a calibration switch, a two-stage dynamic comparator module and a latch buffer stage module, so that the input imbalance voltage of the dynamic comparator is greatly reduced; by introducing a dummy charge pump, the grid leakage characteristics of calibration input geminate transistors are ensured to be consistent, and the calibration stability is improved; the kickback noise elimination circuit can reduce the kickback effect on comparator input; and finally, the pre-amplification stage input transconductance is optimized, so that the noise influence can be effectively reduced, kickback noise can be suppressed, the overall performance of the comparator is improved, and powerful support is provided for application in the fields of vehicle-mounted high-precision analog signal processing, analog-to-digital converters and the like.

The utility model provides an operational amplifier with an input offset voltage, a band-gap reference circuit and a control chip. The operational amplifier comprises a positive temperature coefficient current source, a first differential input geminate transistor, a second differential input geminate transistor, a first resistor, a first current mirror, a second current mirror and a third current mirror. The first end of the first differential input pair transistor is connected with the first end of the first resistor, the second end of the first resistor is connected with the first end of the second differential input pair transistor, the first end of the positive temperature coefficient current source is connected with power supply voltage, and the second end is connected with a first common node of the first differential input pair transistor and the first resistor; the second end of the first differential input geminate transistor is connected with the input end of the first current mirror; the second end of the second differential input geminate transistor is connected with the input end of the second current mirror; the input end of the third current mirror is connected with the output end of the first current mirror, and the output end is connected with the output end of the second current mirror. By means of the band-gap reference circuit, the precision of the output reference voltage of the band-gap reference circuit with only one bipolar transistor in a branch can be improved.

To provide an input circuit that can reduce an input offset voltage while suppressing a change in response of a semiconductor device, and a semiconductor device comprising such an input circuit.SOLUTION: An input circuit has a first differential transistor portion having a plurality of first transistors connected in parallel to each other, a second differential transistor portion having a plurality of second transistors connected in parallel to each other, and a cutoff selectable portion. An output circuit has a first current path portion and a second current path portion disposed in parallel to each other. A first terminal of each of the plurality of first transistors is connected to the first current path portion. A first terminal of each of the plurality of second transistors is connected to the second current path portion. The cutoff selectable portion is connected in series to at least one transistor among the plurality of first transistors and the plurality of second transistors. The cutoff selectable portion is selected to be in one of a state that allows a current to flow and a state that cuts off the current.SELECTED DRAWING: Figure 1

The embodiment of the present invention provides an offset voltage correction circuit and an offset voltage correction method, wherein the offset voltage correction circuit comprises: a data acquisition module, which is used to receive a data signal and a reference signal, and obtain a data indication signal according to a comparison result between the reference signal and the offset data signal, wherein the offset data signal is a data signal after the offset signal is superimposed; a trimming enable module, which is used to receive a data signal, a reference signal, a data indication signal and an enable signal; if the enable signal is at a high level, a theoretical indication signal is obtained according to a comparison result between the data signal and the reference signal, and an enable identification signal is generated based on a comparison result between the theoretical indication signal and the data indication signal; an offset correction module, which is used to offset the offset signal based on the enable identification signal; and the accuracy of signal transmission is ensured by offsetting the input offset voltage at the input stage of an operational amplifier.

The utility model relates to the field of low-noise amplification, in particular to a low-noise high-resistance composite pre-amplification circuit, which has the advantages of extremely high common input mode voltage resistance, ultralow input noise voltage resistance, ultralow input bias current resistance and innovative input offset voltage correction, and can enable composite amplification to be applied to small-range weak signal amplification. According to the technical scheme, the circuit comprises an input detuning offset adjustment module, a primary composite amplification module and a common mode elimination module, the input detuning offset adjustment module outputs bias voltage to the primary composite amplification module, the primary composite amplification module is mainly composed of a differential pair transistor, a resistor and an operational amplifier, the primary composite amplification module only amplifies differential mode signals, and the common mode elimination module is used for eliminating common mode signals. The primary composite amplification module outputs two paths of signals to the common-mode elimination module, and the common-mode elimination module carries out subtraction on voltages of the two paths of signals to eliminate a common mode of the two paths of signals. The low-noise high-resistance composite amplification circuit is suitable for low-noise high-resistance composite amplification of weak signals.

The invention belongs to the field of analog integrated circuits, and particularly relates to a low-noise operational amplifier with a wide common-mode input range. The amplifier comprises an input bias current adjusting unit, a differential input stage unit, an intermediate gain stage unit and a buffer output stage unit which are connected in sequence, the input bias current adjusting unit is used for sampling input-stage current and adjusting the magnitude and temperature drift of input bias current; the differential input stage unit is used for signal acquisition and adopts a rail-to-rail input type common-emitter common-base differential pair structure; the intermediate gain stage unit amplifies a signal received by the differential input stage unit, and the buffer output stage unit provides enough output current to ensure the current driving capability of the operational amplifier; according to the operational amplifier, the equivalent input voltage noise can be reduced by controlling the working current of the input geminate transistors and the load resistance, the operational amplifier can be ensured to have low input offset voltage by trimming the load resistance, and the requirements of the operational amplifier in low-noise and high-precision application scenes are met.

The present invention relates to a low-voltage operational amplifier for reducing system offset voltage, comprising a folded cascode input module (101), a CLASS_AB output stage control circuit (102), and an output stage module (103). The low-voltage operational amplifier solves the problems of large system offset voltage, inaccurate output stage quiescent current control, and wasted dynamic power consumption in existing low-voltage CLASS_AB operational amplifiers, improves the output stage quiescent current error caused by the channel length modulation effect, and simultaneously improves the current matching of the first stage cascode tube by adding a second stage cascode tube, effectively reducing the input offset voltage of the operational amplifier system. When a large external source / sink current exists, the CLASS_AB output stage control circuit (102) is current-limited to limit the internal maximum power consumption, thereby reducing both heat generation and useless power consumption, thereby broadening the application of the CLASS_AB output stage operational amplifier in low-voltage, high-precision circuit systems.

The invention relates to the technical field of analog integrated circuits, in particular to a high-precision temperature sensor temperature-sensing front-end circuit based on a chopping technology, and aims to solve the problems of low-frequency 1 / f noise, operational amplifier input offset voltage drift, band-gap reference temperature drift, limited output driving capability and the like existing at the front end of a traditional temperature sensor. The front-end circuit comprises a chopping band-gap reference source circuit, a chopping buffer circuit and a two-phase non-overlapping clock generation circuit, wherein the chopping band-gap reference source circuit adopts a parasitic bipolar PNP transistor with an emitter junction area ratio of 8: 1 as a temperature sensing device, and a high-gain chopping folded cascode operational amplifier is embedded in the chopping band-gap reference source circuit; and stable positive temperature coefficient voltage and low-temperature drift reference voltage are generated. Noise and maladjustment are inhibited from the system architecture level, the temperature measurement precision can reach the sub-degree centigrade level, the loading capacity is high, the method is achieved based on the standard CMOS technology, a special technology and complex temperature calibration are not needed, and the method has the advantages of being low in cost, high in stability and large-scale integration.

The application relates to a full common-mode range offset voltage trimming operational amplifier, relates to integrated circuit technology, and comprises an operational amplifier circuit and a trimming circuit, characterized in that the trimming circuit comprises a first current source (101) to a seventh current source (107), and a fifteenth NMOS tube (M15) to a thirtieth PMOS tube (M30), a current output end of a sixth current source (106) is connected with a current input end of the seventh current source (107), and a gate is connected with a positive level input line. The application can correct the full common-mode range offset voltage of a rail-to-rail input operational amplifier to a target value, and the input offset voltage almost does not change with the change of a common-mode voltage, so that the linearity of the full common-mode range of the operational amplifier is improved.

The invention relates to a construction method and device of a reliability prediction model of a bipolar operational amplifier, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: carrying out a constant stress accelerated life test on a transistor to obtain change relation data of a normalized beta value at any time length, carrying out parameter fitting on the change relation data to obtain an accelerated degradation coefficient, a time power coefficient and an undetermined coefficient of the transistor, and establishing a degradation track model of the transistor, establishing a circuit simulation model of a differential input structure, and performing an orthogonal test to obtain influence data of a normalized beta value on the input offset voltage of the bipolar operational amplifier; establishing a mapping relation between the normalized beta value and the input offset voltage of the bipolar operational amplifier according to the influence data; and establishing a reliability prediction model of the bipolar operational amplifier by using the degradation track model and the mapping relation. By adopting the method, the reliability prediction accuracy and efficiency of the bipolar operational amplifier can be improved.

The invention provides an operational amplifier and a chip, and belongs to the technical field of operational amplifiers. The operational amplifier comprises an operational amplification circuit, an offset correction circuit and a control circuit, wherein the control circuit controls the operational amplification circuit and the offset correction circuit to work in a periodic mode. In each working period, the control circuit controls the operational amplifier circuit to generate an output voltage according to the input voltage and the first common-mode voltage; meanwhile, the control circuit controls the offset correction circuit to carry out zero clearing on the offset voltage of the offset correction circuit and carries out zero clearing on the target offset voltage under the action of the output voltage and the second common-mode voltage, and the target offset voltage is a part of the first offset voltage corresponding to the operational amplifier circuit. According to the operational amplifier, loop oscillation can be effectively suppressed and corrected, the output overshoot of the operational amplifier circuit can be remarkably reduced, the residual offset voltage of the operational amplifier circuit can be weakened cycle by cycle, and the input offset voltage of the operational amplifier circuit continuously approaches zero.

The present application relates to a method, device, computer equipment, computer-readable storage medium and computer program product for constructing a reliability prediction model of a bipolar operational amplifier. The method includes: conducting a constant stress accelerated life test on a transistor to obtain data on the variation relationship of the normalized β value with time duration, performing parameter fitting on the variation relationship data to obtain the acceleration degradation coefficient, time power coefficient and undetermined coefficient of the transistor, and establishing a degradation trajectory model of the transistor; establishing a circuit simulation model of a differential input structure, and obtaining, through orthogonal experiments, data on the influence of the normalized β value on the input offset voltage of the bipolar operational amplifier; establishing a mapping relationship between the normalized β value and the input offset voltage of the bipolar operational amplifier according to the influence data; and establishing a reliability prediction model of the bipolar operational amplifier by using the degradation trajectory model and the mapping relationship. The use of this method can improve the accuracy and efficiency of the reliability prediction of the bipolar operational amplifier.

The invention provides a low-cost switching power supply for high-precision electric energy metering and a control method thereof. A voltage output pin of a switching power supply chip is grounded through a first capacitor; an external low-voltage power supply is connected and charges the first capacitor through the first resistor and the first diode, and the maximum soft start current of the boost power supply circuit is limited to be less than 100mA by setting the resistance value of the first resistor; an external low-voltage power supply is connected to a power supply input pin of the switching power supply chip through a sampling resistor, the sampling resistor is connected with an in-phase input end and an inverted input end of a voltage comparator, and whether overcurrent occurs or not is judged according to high or low level signals output by the voltage comparator; the over-current protection threshold value of the USB power supply circuit is limited by setting the resistance tolerance level and the input offset voltage of the voltage comparator. By designing the soft start and overcurrent protection circuit, the USB power supply with surge current prevention and precise overcurrent protection functions is provided, and the effects of greatly reducing the cost, simplifying the circuit design and improving the circuit reliability are achieved.

The invention relates to the technical field of analog circuits, and discloses an array resistor coupling crosstalk suppression circuit based on an improved isopotential method, which comprises an array resistor, a row multiplexer switch, a column multiplexer switch, a driving operational amplifier, a bias operational amplifier, a reading operational amplifier, a feedback resistor RF, a feedback capacitor CF, a driving voltage VDRIVE and a bias voltage VREF, the row multi-path selection switch is a switch combination with three switches in each row, and the column multi-path selection switch is a switch combination with three switches in each column; by improving a circuit connection mode and a signal reading scheme in an existing equipotential circuit, coupling crosstalk caused by on resistance of a row-column gating switch, input offset voltage of an integrated operational amplifier and limited open-loop gain is remarkably eliminated, and the accuracy of a system is improved.

This invention provides a low-dropout linear regulator, including a base regulator circuit, a switching unit, and a load. One end of the load is connected to the output terminal of the base regulator circuit, and the other end of the load is connected to load ground. The switching unit is connected to the base regulator circuit. The switching unit is used to store an offset voltage and a reference voltage at a first input terminal of the base regulator circuit, and then swap the functions of the first and second input terminals of the base regulator circuit to cancel the offset voltage at the first input terminal, thereby reducing the impact of the input offset voltage. This invention also provides a control method for the low-dropout linear regulator.

The invention provides a multi-amplifier circuit. The first amplifier (1) amplifies and outputs two input differential voltages. The second amplifier (2) amplifies and outputs the differential voltages of the two inputs. Each of the first amplifier (1) and the second amplifier (2) includes a first differential input circuit (D1), a second differential input circuit (D2), and a current adjustment unit (30). The first differential input circuit (D1) includes a transistor pair that amplifies and outputs a differential voltage of two inputs. The second differential input circuit (D2) includes a transistor pair that amplifies and outputs a differential voltage input to the two differential input circuits (D1). The differential input circuits (D1, D2) have asymmetric structures that each generate input offset voltages that are positively and negatively opposite to each other. A monitor amplifier (51) amplifies and outputs a differential voltage between an input to the first amplifier (1) and an input to the second amplifier (2). The current adjustment unit (30) adjusts the current ratio of the currents flowing into the differential input circuits (D1, D2) in response to the output of the monitor amplifier (51).

An enhanced auto-zero circuitry and technique for reducing the effective input offset voltage of an amplifier. The circuitry includes a multi-phase auto-zeroing amplifier circuitry including several capacitor and switch components and a switch controller circuit. The switch controller circuit is configured to provide control signals for controlling the switches, where during a first sub-phase of an auto-zero phase, multiple switches are turned on to store an amplifier input offset coarser compensation charge on the input capacitor, and where during a second sub-phase of the auto-zero phase, at least one switch is turned off before turning on another switch to store an amplifier input offset finer compensation charge on the input capacitor via the first auto-zero capacitor.

The invention discloses a memristor simulator equivalent circuit, a control method and electronic equipment, and belongs to the technical field of circuit element simulators. The memristor simulator equivalent circuit provided by the invention can reproduce the characteristics of the memristor and replace the memristor by using the combination of the multiplier and the operational amplifier, not only supports long-term debugging and use, but also avoids complex hardware circuit design and high device cost use, and solves the problem of performance degradation under non-ideal conditions. By introducing the integrator composed of the second operational amplifier and the integrating capacitor, the dynamic characteristics of the memristor can be accurately simulated, the stability of conductivity in a non-conducting state is ensured, and errors caused by non-ideal characteristics (such as input offset voltage and input bias current) of the operational amplifiers are reduced; by arranging the single-pole double-throw switch, the circuit can be flexibly switched among different working modes, and circuit parameters can be conveniently adjusted according to actual application requirements, so that the performance of the simulator is optimized.