117 results about "Loop gain" patented technology

The embodiment of the invention provides a closed-loop control method for power driving and protection, and the method comprises the steps: constructing a voltage feedback type circuit through a high-speed operational amplifier, and forming a closed-loop gain structure through a feedback network of the voltage feedback type circuit; the load current of the output end of the voltage feedback type circuit is monitored in real time, and when the load current exceeds a first set threshold value, a protection mechanism is triggered to turn off the output stage; the power-on surge current is limited through the soft start control circuit; phase information of a load reflection coefficient is obtained, an inductance / capacitance combination of the variable dynamic impedance matching network is selected according to phase information table look-up, inductance / capacitance parameters are switched through a relay, and the transmission standing-wave ratio between the power amplifier and a load is optimized; monitoring the temperature of the radiating fin of the power tube, and dynamically adjusting the resistance value of the feedback network; and performing cooperative control of short-circuit protection, over-temperature protection and surge suppression according to the priority. According to the embodiment of the invention, the performance bottleneck in a load fluctuation scene is broken through.

The invention belongs to the field of stability analysis of a grid-connected system of a grid-building converter, and particularly relates to a grid-building converter grid-connected resonance risk analysis method considering virtual impedance, which comprises the following steps: S1, establishing a three-phase time domain differential equation and simplifying the equation into a single-phase equivalent time domain model; converting into a harmonic state space model of the main circuit; s2, constructing a harmonic state space model of a control system comprising an active power control loop and a reactive power control loop; s3, introducing a virtual impedance control link, and correcting the voltage amplitude reference phasor output by the reactive power control loop; deriving an expression of a modulation signal disturbance phasor; s4, obtaining a complete frequency domain admittance model YGSC of the network construction converter considering the influence of the virtual impedance; an open loop gain TGFM of the grid converter grid-connected system is constructed; and S5, drawing a Nyquist curve based on TGFM, and carrying out resonance risk determination. According to the method, the interaction dynamic characteristics of the network building converter and the power grid under the influence of the virtual impedance can be accurately represented, and the resonance risk of the grid-connected system is evaluated.

The invention relates to the technical field of chip detection, and discloses a high-reliability power supply chip circuit fault detection system, which comprises a built-in self-test architecture integrated in a low dropout regulator chip, and the built-in self-test architecture is provided with a first test mode and a second test mode which are switched based on a mode switching control circuit. The detection module is used for detecting key performance parameters of an error amplifier sub-circuit in a low dropout linear regulator chip, the detection module is used for measuring the direct current loop gain, the offset voltage, the common mode rejection ratio and the power supply ripple rejection ratio of the amplifier in the first test mode, and the detection module is used for measuring the unity gain bandwidth of the amplifier in the second test mode. According to the invention, through the design of a built-in self-test architecture and two test modes, abnormal states such as differential circuit imbalance and feedback loop fault can be identified in a bare chip stage, chips with poor performance are rejected in advance, and the LDO chip is ensured to reach a ppb-magnitude high reliability standard.

The invention provides a transimpedance type flip voltage following driving linear voltage regulator, which comprises a control module and a transimpedance type flip voltage follower, namely a TIFVF module, and is characterized in that the control module comprises an error amplifier and a voltage-current converter which are connected in series; the output voltage Vout passes through a selectable divider resistor and then is fed back to an error amplifier to be compared with the reference voltage Vref to obtain an error signal, the error signal is amplified and conditioned by a compensation network to obtain a control voltage signal Vctrl, and the control voltage signal Vctrl passes through a voltage-current conversion circuit to obtain a current control signal Ictrl required by the TIFVF; the whole forms a negative feedback loop, and two links of error amplifier-voltage and current conversion provide enough loop gain.

A closed-loop control device for closed-loop control of a power assembly is configured for:detecting a generator frequency of a generator;determining a control deviation as a difference between the detected generator frequency and a target generator frequency;determining a target torque as a manipulated variable for controlling an internal combustion engine as a function of the control deviation;using a control rule for determining the target torque; andadapting the control rule—used to determine the target torque—as a function of an adaptation variable, the adaptation variable being the detected generator frequency, a target torque variable, or a generator power, wherein the closed-loop control device can adapt the control rule by determining a proportional coefficient of the control rule such that a predetermined loop gain (vf) of an open control loop is constant, the predetermined loop gain (vf) being: vf=kpf((fG,stat)(30 Mm,stat)).

The invention belongs to the technical field of stability compensation circuits, and particularly relates to a stability compensation circuit structure of a high-speed operational amplifier, which is characterized by comprising a function module, a first control module, a second control module, a third control module, a fourth control module and a fourth control module, and the function module comprises an input stage, a differential common-base gain stage, a common-base level converter module and an output stage, and the stability compensation assembly comprises a dual-frequency load unit which is matched with the functional module and comprises a low-frequency load branch and a high-frequency load branch which are connected in parallel. Through the synergistic effect of the double-frequency load unit and the pole regulation and control capacitor, gain segmentation regulation and control of low-frequency high gain and high-frequency fast attenuation are achieved, the open-loop gain of the operational amplifier breaks through the limitation of 30dB of an existing HBT single-stage operational amplifier, and meanwhile the problem that high-frequency phase shift changes too fast is effectively restrained; through simulation verification, the phase margin can reach 67 degrees, the stability requirement of 45-60 degrees and above of an analog circuit is met, and the core contradiction that the high-gain bandwidth and the phase margin of an HBT device are difficult to balance is thoroughly overcome.

The invention relates to the technical field of integrated circuit design, high-voltage power supply management chips and the like, and provides a voltage stabilizing circuit suitable for a high-voltage power supply management chip and the high-voltage power supply management chip. The circuit comprises an error amplifier, an N-channel MOS tube M1 and a voltage setting feedback network. The error amplifier outputs a control signal to the grid electrode of the M1 by comparing a reference voltage with a feedback voltage; the drain electrode of the M1 is connected with input high voltage VIN, and the source electrode is grounded through a feedback network to form a negative feedback structure. The voltage stabilizing circuit provided by the invention is simple in structure, high in stability and fast in response, can solve the problems of complex loop gain and difficult compensation, realizes the simplification of a loop structure, improves the phase margin of a circuit system, enhances the stability and load transient response, can be integrated in a high-voltage power supply management chip, and has a wide application prospect. And a stable low-voltage power supply is provided for high-voltage applications such as industry and automotive electronics.

The position-torque double closed-loop servo system parameter optimization control method provided by the invention is stable and rapid in dynamic response. On the basis that a position regulator is composed of first-order advanced feedback of a unit proportionality coefficient and regulation with proportion and integration as main components, a simplest expectation mathematical model of a closed-loop single-zero-point type 3 (a forward channel of the system has three integration links) control system is provided, and the maximum phase angle margin of the system is used as an optimization target. And deriving an analytic formula of system open-loop gain optimization setting, and further providing a position regulator parameter optimization setting control method which enables the position-torque double-closed-loop servo system to have low-overshoot, stable and rapid performance on step response. The method has important guiding significance on design of the position-torque double-closed-loop servo system requiring stable and rapid dynamic response, product development (including experimental equipment), on-site commissioning, debugging and the like, and meanwhile, the design theory of the motor position-torque double-closed-loop servo system is also perfected.

The invention discloses a compound control method for improving the current control performance of a three-phase LCL type grid-connected inverter. The method comprises the following steps: establishing a system loop gain based on digital control delay; composite control is realized by adopting a mode of combining a capacitance current sampling modification mode and a delay compensation link, and the capacitance current sampling modification mode is used for shortening capacitance current sampling delay and comprises the steps of sampling grid-connected current at a wave trough of a triangular carrier wave, sampling capacitance current at a wave crest of the triangular carrier wave, and carrying out delay compensation on the grid-connected current. A modulation signal is loaded at the next grid-connected current sampling moment, and capacitance current sampling delay is shortened by half beat; the delay compensation link is used for compensating the influence of digital control delay, the influence of digital control delay is reduced by embedding a lead phase compensator in a capacitive current feedback loop, and the stability of the system and the quality of grid-connected current are improved. According to the invention, composite control is realized by adopting a mode of combining a capacitor current sampling modification mode and a delay compensation link addition mode.

The invention discloses a fast transient response LDO (Low Dropout Regulator) circuit which comprises a voltage stabilizing circuit used for stably outputting direct current voltage; the voltage output channel is used for converting the direct-current voltage into a control signal vctrl and then recovering the control signal vctrl and taking the control signal vctrl as an output voltage vout of the fast transient response LDO circuit; the fast response loop comprises a first burr detection path, a second burr detection path, a PMOS (P-channel Metal Oxide Semiconductor) tube Mcas and an NMOS (N-channel Metal Oxide Semiconductor) tube Mpass, the first burr detection path and the second burr detection path respectively detect the fluctuation of the output voltage vout and synchronously output a detection signal, and the output voltage vout is subjected to negative feedback through the NMOS tube Mpass after being amplified by the PMOS tube Mcas. According to the invention, output voltage vout fluctuation caused by output load change can be rapidly reduced, and the circuit has the advantages of high sensitivity, high loop gain, unlimited output voltage range and full integration.

The invention discloses a servo motor disturbance suppression method based on variable gain control, and the method comprises the steps: adding a nonlinear branch for disturbance suppression on the basis of a conventional position closed-loop control structure; the nonlinear branch is formed by connecting a phase extractor and a gain regulator in series, the phase extractor extracts effective phase information according to a tracking error signal of the servo system, and the gain regulator outputs a corresponding nonlinear compensation signal according to the phase information. After the compensation signal is superposed to the position loop, the loop gain of the system at a low frequency band can be dynamically improved, so that the disturbance suppression capability is remarkably enhanced. The nonlinear branch is essentially a switching function, but is different from a traditional switching function or a fixed gain control mode, the gain regulator adopts a reset integral mechanism to generate nonlinear gain, and the gain regulator has excellent low-frequency disturbance suppression performance and anti-noise capability. The device has the advantages of simple structure, quick response and the like.

The application relates to a voltage follower-based addressable sensitive amplifier test circuit, which comprises: a sensitive amplifier array to be tested, the array comprising a plurality of sensitive amplifiers to be tested; an addressing circuit for providing an address signal to select a target sensitive amplifier; a switch selection circuit connected between the sensitive amplifier array to be tested and an external test node, controlled by the addressing circuit, for coupling the signal of the external test node to the selected sensitive amplifier; and a voltage follower module with an input end connected to the switch selection circuit, for transmitting the test voltage output by the switch selection circuit to the corresponding end of the selected sensitive amplifier. The application can realize efficient and accurate SA performance testing. The node voltage curve is only affected by the gain of the operational amplifier, and the design open-loop gain is above 60 dB, so that an error below 0.1% can be realized.

This invention belongs to the field of analog integrated circuit design, and particularly relates to a low-dropout linear regulator with fast dynamic response and high stability. It includes: an error amplifier, a Class AB buffer stage circuit, an output power transistor, a positive feedback resistor compensation circuit, an undervoltage detection circuit, and a startup circuit. The Class AB buffer stage circuit is used to improve the transient characteristics of the low-dropout linear regulator, and the positive feedback resistor compensation circuit is used to improve the phase margin of the low-dropout linear regulator. This invention achieves fast dynamic response, essentially eliminates overshoot and undershoot phenomena, and significantly shortens the recovery time. It also maintains high stability while ensuring loop gain and includes undervoltage detection functionality to ensure smooth system startup.

The invention discloses a power output improvement circuit, method and chip for an LDO.The circuit comprises a first power MOS tube, a second adjusting MOS tube and a third auxiliary MOS tube which are arranged between a power source positive electrode and a power source negative electrode, the source electrode of the first power MOS tube is connected with the power source positive electrode, the drain electrode of the first power MOS tube is electrically connected with the source electrode of the second adjusting MOS tube, and the source electrode of the third adjusting MOS tube is electrically connected with the source electrode of the third auxiliary MOS tube; the drain electrode of the second adjusting MOS tube is electrically connected with the source electrode of the third auxiliary MOS tube, and the drain electrode of the third auxiliary MOS tube is electrically connected with the negative electrode of the power supply; a self-adaptive proportional control network is connected between the positive electrode of the power supply and the drain electrode of the second adjusting MOS tube, the self-adaptive proportional control network is further electrically connected with the grid electrode end of the first power MOS tube, and the second adjusting MOS tube can be controlled to work in a saturation region through the self-adaptive proportional control network after the load changes. Therefore, the power output can have enough loop gain under the conditions of light load and heavy load.

This invention relates to instrumentation amplifiers and biosignal acquisition methods, specifically to a capacitively coupled instrumentation amplifier and biosignal acquisition method. It solves the technical problems of poor accuracy and integrity of biosignals acquired by existing instrumentation amplifiers, as well as their large area. This invention employs an input impedance enhancement circuit to increase the input impedance, resulting in more complete biosignals. It also uses a transimpedance matching enhancement circuit to increase the matching degree between the output signal of the feedback loop and the differential output signal. Simultaneously, by reducing the feedback capacitor to increase the closed-loop gain and lower the requirement for the input capacitor, it not only reduces the area but also increases the input impedance, improving the accuracy and integrity of the acquired biosignals. The second-order DC electrode offset cancellation circuit uses a second-order low-pass filter to narrow the transition band, more effectively separating the DC electrode offset signal from the biosignal, eliminating the DC electrode offset problem during biosignal acquisition, and making the acquired biosignals more accurate.

A self-excitation microwave sensor suitable for non-destructive testing of metal mesh film, belonging to microwave sensor technology, comprising a resonant sensing structure, a microwave amplifier, a phase shift element, a band-pass filter, a radio frequency detector, a digital-to-analog converter and a microprocessor; wherein the resonant sensing structure, the microwave amplifier, the phase shift element and the band-pass filter form a self-excitation oscillation loop, the resonant sensing structure has a band-pass characteristic, is located in the feedback branch of the loop, the resonant frequency thereof is consistent with the center frequency of the band-pass filter, and the loop gain and the phase shift satisfy the self-excitation oscillation condition at the frequency; by reasonably setting the gain of the microwave amplifier and collecting the self-excitation oscillation signal power in real time, the sensor can realize detection of sub-millimeter width crack damage and identification of high square resistance samples, has high detection sensitivity, compact structure, small volume and low cost, does not need other external microwave analysis instruments, and can be applied to on-site non-destructive testing of metal mesh film.

The application relates to the chip detection technical field and discloses a high-reliability power supply chip circuit fault detection system which comprises a built-in self-test architecture integrated in a low-dropout linear voltage regulator chip. The built-in self-test architecture is provided with a first test mode and a second test mode which are switched based on a mode switching control circuit to detect the key performance parameters of an error amplifier subcircuit in the low-dropout linear voltage regulator chip. The first test mode is used for measuring the direct current loop gain, the offset voltage, the common mode rejection ratio and the power supply ripple rejection ratio of the error amplifier. The second test mode is used for measuring the unit gain bandwidth of the error amplifier. According to the built-in self-test architecture and the two test modes, the application can identify abnormal states such as differential circuit imbalance and feedback loop failure in the bare chip stage, and can remove the chips with poor performance in advance, so that the LDO chip can reach the high-reliability standard of ppb.

This invention relates to the field of circuit hardening technology, and provides a voltage-controlled oscillator (VCO) circuit and phase-locked loop (PLL) circuit that are resistant to single-event transients. Addressing the issue that traditional three-mode relaxation oscillator (VCO) circuits are unsuitable for low-voltage conditions, especially when the power supply voltage drops to around 0.8V, this invention employs six oscillation branches coupled into three large oscillation loop circuits to improve loop gain. Furthermore, by combining bias circuits, comparators, and voting circuits for each path, the problem of increasing nonlinearity is avoided. This achieves a combination of large oscillation loops, bias circuits, and a three-mode VCO architecture, resulting in a VCO circuit that maintains high-frequency stable operation under ultra-low voltage conditions such as 0.8V, thus achieving a single-event transient resistance effect, especially at low voltages of 0.8V.

The utility model provides a low dropout regulator and electronic equipment, and belongs to the technical field of electronic circuits. The low dropout linear regulator comprises an error amplifier, a partial pressure sampling circuit, a power tube and a voltage conversion module. Wherein the error amplifier comprises a first input end, a second input end and an output end, the first input end is used for accessing reference voltage, the output end is connected with a first end of the voltage conversion module, a second end of the voltage conversion module is connected with a grid electrode of the power tube, a source electrode of the power tube is connected with power supply voltage, and a drain electrode of the power tube is connected with an input end of the voltage division sampling circuit; the output end of the voltage division sampling circuit is connected with the second input end. According to the LDO, the voltage conversion module is arranged between the error amplifier and the power tube of the LDO and used for adjusting the grid voltage of the power tube, the output stage of the error amplifier can work in a saturation region, and therefore the loop gain and stability are guaranteed.

The application belongs to the technical field of power management, and particularly relates to a large-plate external capacitor LDO with an overcurrent loop structure and high PSR performance. ds The application utilizes the large-plate external capacitor to benefit voltage stabilization and the high-voltage power tube has the characteristics of large r The application converts the common low-voltage drop and small-load-current LDO into a high-voltage drop and large-load-current LDO, and improves the PSR performance of the LDO in the full frequency band. Compared with the traditional structure, the power supply noise at low frequency can be suppressed through large loop gain, and the power supply noise at medium and high frequencies can be filtered out through the large-plate external capacitor.

A system for operating an LC-VCO includes: a low power, low phase noise inductance capacitance voltage controlled oscillator (LC-VCO); an LC-VCO power supply regulator configured to regulate a power supply voltage to the LC-VCO; and a feedback network connected to the LC-VCO power supply regulator. The feedback network is configured to track a process voltage temperature (PVT) variation of a metal oxide semiconductor field effect transistor (MOSFET) used in a negative transconductance circuit of the LC-VCO, and adjust a loop gain of the LC-VCO over the PVT variation. The feedback network includes: a first MOSFET, where the first MOSFET is configured to function as a switch; a first resistor connected to both ends of the first MOSFET; a current source device biased with a bandgap voltage; the diode and current mirror pair comprises a second MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) and a third MOSFET; and a constant current source connected to the current source device and the diode and current mirror pair.

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 present application relates to the technical field of intelligent decision-making, in particular to an engineering change intelligent identification and influence analysis method and system. In the present application, by extracting the physical connection information of the field control equipment and associating the operating parameters and the logical constraint parameters, a field device interconnection topology model with signal flow direction as the connection line is constructed, the discrete engineering equipment is converted into a digital map with logical handshake relationship, the parameter modification behavior is monitored in real time and the change source equipment is locked, the history trend consistency and real-time availability of the redundant signal channel are verified by using the grey correlation analysis algorithm and the effectiveness threshold, when it is confirmed that it has effective backup, it is automatically determined as a blocking node, the input signal change is simulated and calculated according to the PID control algorithm combined with the loop gain coefficient, whether the fluctuation occurs physical dissipation is confirmed by comparing the absolute value of the difference of the theoretical output signal and the signal control dead zone threshold, and the effective fluctuation which can actually drive the downstream equipment action is accurately identified.

The application provides a non-magnetic meter control circuit, a non-magnetic meter circuit, a chip and a meter. A charging circuit is connected between a first power supply and a first port, the first port is also connected to an input end of a voltage detection circuit, and an output end of the voltage detection circuit is connected to the charging circuit. When a charging voltage of an oscillation circuit does not reach a threshold voltage, the voltage detection circuit controls the charging circuit to be connected to enable the first power supply to charge the oscillation circuit. When the charging voltage of the oscillation circuit reaches the threshold voltage, the voltage detection circuit controls the charging circuit to be disconnected to enable the first power supply to stop charging the oscillation circuit. The voltage detection circuit detects the charging voltage to control the on and off of the charging circuit, and can accurately charge and stop charging the oscillation circuit, and does not have a closed loop stability problem and does not need loop gain, so that a capacitor and a resistor are omitted, and the chip cost is saved.

The application provides a low-dropout linear voltage regulator with embedded reference high loop gain, and a voltage stabilizing method. The low-dropout linear voltage regulator comprises an adjusting power tube, a source electrode of the adjusting power tube is connected with a voltage input end for providing an input voltage, and a drain electrode of the adjusting power tube is connected with a voltage output end for outputting a voltage; a first loop is electrically connected with a gate electrode of the adjusting power tube, and is used for forming a pseudo push-pull stage; and a second loop is electrically connected with the drain electrode of the adjusting power tube, and is used for forming a bias circuit of the adjusting power tube by the output voltage. The second loop makes the high DC gain of the whole circuit, thereby improving the linearity, load regulation rate and low-frequency PSR, and the pseudo push-pull output stage is realized at the gate electrode of the adjusting power tube, so that the static current of the whole circuit is only in the nA level, and the low-dropout linear voltage regulator has the characteristics of compact structure, no amplifier, low power consumption and high gain.

The invention discloses an analog fast automatic gain control circuit for a transimpedance amplifier, which belongs to the field of optical communication transimpedance amplifiers, and adopts the technical scheme that a gain compensation unit is introduced into a feedback loop, the analog fast automatic gain control circuit comprises an operational amplifier A2, a resistor R2, an MOS (Metal Oxide Semiconductor) tube M1, an MOS tube M2, a resistor R1, a current source, an MOS tube M3, a resistor R3 and a capacitor C2, the equivalent resistance of the MOS tube M1 is reduced when the MOS tube M1 works in a linear region, and the equivalent resistance of the MOS tube M2 is reduced when the MOS tube M2 works in a linear region; under the synergistic effect of the source negative feedback circuit, the transconductance reduction of the controlled gain adjusting element is compensated, so that the open-loop gain stability of an automatic gain control loop is maintained; according to the scheme, the problem that the response time is inconsistent when the amplitude of the input signal is changed in the traditional analog automatic gain control is solved, the loop response time is consistent under different input amplitudes, the design upper limit of the circuit response speed is remarkably improved, meanwhile, the defect that the output amplitude is suddenly changed when a digital gain control scheme is switched is avoided, and the circuit reliability is improved. And the output stability and the high-speed performance are ensured.

This disclosure provides a low-dropout linear regulator (LDO), comprising: an error amplifier, a buffer, a power transistor, a voltage divider negative feedback unit, and a temperature detection unit. The error amplifier includes at least a first output load and a second output load, wherein the equivalent output impedance of the second output load is greater than the equivalent output impedance of the first output load. The temperature detection unit is used to detect the current operating ambient temperature. When the current operating ambient temperature is greater than or equal to a first temperature threshold, the temperature detection unit drives the error amplifier to use the second output load as the current output load. This disclosure performs real-time detection of the operating ambient temperature through the temperature detection unit. When the detected ambient temperature exceeds the temperature threshold, an enable signal is generated to drive the error amplifier to switch its output load, changing its current output load to an output load with a higher equivalent impedance. This improves the gain of the error amplifier, thereby increasing the loop gain and ultimately improving the accuracy of the LDO output voltage.

The present application relates to the technical field of electronic measurement, more particularly, it is especially related to a composite pressure expansion, flow expansion and frequency expansion circuit, which comprises an input signal source, a front-stage precision operational amplifier circuit, a rear-stage high-voltage and high-current operational amplifier circuit and a feedback loop, the input signal source is connected with the input end of the front-stage precision operational amplifier circuit, the output end of the front-stage precision operational amplifier circuit is connected with the input end of the rear-stage high-voltage and high-current operational amplifier circuit, and the feedback loop is connected between the output end of the rear-stage high-voltage and high-current operational amplifier circuit and the input end of the front-stage precision operational amplifier circuit.The present application uses cascaded operational amplifier circuits to realize a high-precision, high-voltage, high-current and wide-frequency output circuit.Through multi-stage operational amplifier cascading and feedback configuration, higher closed-loop gain is obtained under the premise of ensuring stability, and the effective bandwidth is expanded to meet the high-frequency or high-gain signal processing requirements.

Provided is an amplifier that stably obtains an effective chopper amplifier gain with respect to a closed-loop gain setting, and that has good correction convenience. The amplifier includes: an input terminal; a chopper circuit capable of switching between a direct connection state and a cross connection state; a first resistor and a third resistor; a variable resistor; a first operational amplifier having an input end connected to the output end, a control end receiving a supplied control signal, and an input end connected to one end of the first resistor and one end of the variable resistor; a second operational amplifier having an input end connected to the output end, a control end receiving a supplied control signal, and an input end connected to one end of the third resistor and the other end of the variable resistor; and an output terminal configured so that the first operational amplifier and the second operational amplifier can switch their gain bandwidths on the basis of the control signal.

The present invention discloses an amplifier linearization design verification method and a storage medium. By utilizing negative impedance compensation to compensate a nonlinear amplifier circuit, the closed-loop gain and linearity of the nonlinear amplifier circuit are improved, thereby reducing the nonlinear distortion of the amplifier. At the same time, fewer components are required, thereby improving the overall reliability of the circuit. By analyzing the total harmonic distortion and intermodulation distortion of the linearized amplifier circuit, the relative distortion level of each harmonic component of the linearized amplifier circuit can be clearly expressed, and the complexity of the entire amplifier circuit is reduced, the flexibility of constructing the amplifier circuit is improved, and the applicability of the amplifier linearization design verification method is improved.