249 results about "High input" patented technology

The invention relates to the technical field of wireless communication networks, and provides a low-channel electroencephalogram amplification circuit and brain-computer interface equipment oriented to an after-ear electroencephalogram signal, and the low-channel electroencephalogram amplification circuit comprises a dry electrode sensing module which is used for collecting an electroencephalogram signal; the front active amplification module comprises an operational amplifier circuit with high input impedance; the anti-aliasing filtering module is formed by cascading a multi-order passive filtering network and an active filtering circuit, is connected with the output end of the front active amplification module and is used for filtering high-frequency interference signals; the right leg driving feedback module comprises a programmable impedance adjusting circuit and a current limiting protection circuit, the right leg driving feedback module and the front active amplification module form a closed-loop feedback loop, and the output end of the right leg driving feedback module and the human body form a current loop through a protection resistor; the analog-to-digital conversion module adopts an integrated low-power-consumption analog front-end chip; a wireless transmission module; and the power supply management module provides independent power supply for the analog front-end chip, the operational amplifier circuit and the wireless transmission module.

The invention provides a control circuit for a PFC (power factor correction) circuit and a THD (total harmonic distortion) optimization method of the control circuit. The control circuit comprises an input voltage amplitude judgment circuit which is used for obtaining an input voltage amplitude judgment signal used for judging the amplitude of the input voltage of the input end of the PFC circuit; the maximum conduction time control circuit is used for controlling the maximum conduction time of the main power switch tube based on the input voltage amplitude judgment signal, when the input voltage amplitude is a first voltage, the maximum conduction time is a first time, when the input voltage amplitude is a second voltage, the maximum conduction time is a second time, the first voltage is greater than the second voltage, and the second voltage is greater than the first time. The first time is shorter than the second time. According to the control circuit for the PFC circuit and the THD optimization method of the control circuit, the THD performance can be obviously improved by reducing the maximum conduction time in a high input voltage amplitude state.

The embodiment of the invention provides a high-sensitivity vibration measurement and analysis instrument. In the embodiment of the invention, the signal buffering and driving sub-module in the signal conditioning module effectively isolates the sensor from a subsequent circuit by providing high input impedance and low output impedance, the load effect of a signal source is prevented, and the integrity and stability of the signal in the transmission process are ensured. Moreover, the driver part enhances the driving capability of the signal, so that the signal can overcome the impedance of a transmission line, and the attenuation of the signal in long-distance transmission is reduced, thereby guaranteeing the quality of the signal, and enabling the adaptive gain controller sub-module to automatically adjust the gain according to the intensity of the input signal. By means of the innovative design, the system can keep the best sensitivity when facing vibration signals of different amplitudes, signal saturation is avoided, it is guaranteed that weak vibration or strong vibration can be accurately measured, and the data accuracy in the digital signal processing stage is guaranteed.

The invention discloses an isolation circuit, a three-phase isolation circuit, a controller, a method and a storage medium, and the isolation circuit comprises an input filter capacitor (Ci), a first inductor (Lf1), a second inductor (Lf2), an upper tube (Q1), a lower tube (Q2), a first energy transfer capacitor (C1), a second energy transfer capacitor (C2), a first transformer (T1) and a second transformer (T2). Meanwhile, a single-stage isolation topology control algorithm is simplified, the conversion efficiency is greatly improved, the requirements of higher power level design and wider output voltage range can be met, and higher input voltage working capacity can be achieved; the electromagnetic compatibility of the power supply module can be greatly improved due to the double-inductor design of input energy transfer; furthermore, an active power factor calibration function can be realized, and input and output current ripples and voltage ripples can be greatly reduced through upper and lower tube staggered phase-shifting control, so that the service life of an output capacitor is prolonged.

The invention discloses a differential closed-loop negative feedback amplification circuit based on JFET geminate transistors, a low-noise amplifier is used for measuring weak voltage signals, discrete JFET field-effect transistors are used for forming an input stage of the low-noise amplifier, noise interference is reduced, meanwhile, extremely high input impedance can be provided by using the characteristic that the grid current of the JFET field-effect transistors is basically zero, and the differential closed-loop negative feedback amplification circuit based on the JFET geminate transistors is obtained. Mirror current is provided for a pair of JFET field effect transistors in the low-noise amplifier module through a current mirror of the low-noise amplifier, a closed-loop feedback structure of the low-noise amplifier can save one path of input for the JFET field effect transistors, so that the amplifying circuit can realize dual-channel input, and a dual-channel input structure can enable an accessed signal to be a differential signal, so that common-mode interference is effectively inhibited, and the reliability of the amplifying circuit is improved. Overall closed-loop negative feedback can achieve high gain stability, reduce nonlinear distortion, increase input impedance, reduce output impedance and improve the performance of the amplifier, and solves the problem of precise amplification and measurement of weak voltage signals in the aviation electromagnetic field.

The invention relates to the technical field of wireless communication, and provides a preparation method of a surface acoustic wave filter and the surface acoustic wave filter.The preparation method comprises the steps that S1, a substrate of the surface acoustic wave filter is obtained; s2, growing a plurality of metal electrodes and a protective layer on the front surface of the substrate, wherein the protective layer completely covers the plurality of metal electrodes; s3, presetting a soaking column area on the substrate, and spin-coating a layer of photoresist on the back surface of the substrate; s4, removing the photoresist in the soaking column region through exposure and development; s5, etching the soaking column region through dry etching to form a groove, and removing the residual photoresist on the substrate; s6, depositing an electroplating seed layer on the back surface of the substrate, and continuing to complete the copper electroplating process, so that the groove is filled with copper; and S7, grinding the back surface of the substrate until the back surface of the substrate is exposed, and reserving the soaking column formed in the groove to obtain the surface acoustic wave filter. The surface acoustic wave filter provided by the invention can effectively improve the thermal damage resistance of the device under the working condition of high input power.

Described herein are gate-all-around (GAA) transistors with extended drains, where the drain region extends through a well region below the GAA transistor. A high voltage can be applied to the drain, and the extended drain region provides a voltage drop. The transistor length (and, specifically length of the extended drain) can be varied based on the input voltage to the device, e.g., providing a longer drain for higher input voltages. The extended drain transistors can be implemented in devices that include CFETs, either by implementing the extended drain transistor across both CFET layers, or by providing a sub-fin pedestal with the well regions in the lower layer.

Technologies are provided to calculate a logarithm of an input current to a logarithmic transimpedance amplifier device at a particular temperature. The logarithm of the current is calculated in digital domain based on sampling of analog signals that are internal to the logarithmic transimpedance amplifier device. The sampling can be performed, in some cases, by an analog-to-digital converter device integrated into the logarithmic transimpedance amplifier device. The calculation in digital domain is performed by one or more processor external to the logarithmic transimpedance amplifier device. The calculation includes a determination of a temperature compensation factor based on an internal analog signal indicative of temperature of the logarithmic transimpedance amplifier device. The temperature compensation factor permits removing temperature dependence from a logarithmic output voltage originating from the input current. Operating in the digital domain permits applying corrections that account for residual leakage current and an emitter-resistance correction at high input currents.

The invention discloses a non-electrolytic capacitor permanent magnet synchronous motor torque ripple suppression method and device based on current harmonic injection, and belongs to the field of permanent magnet synchronous motor control, and the method comprises the steps: enabling the power of an inverter to be equal to the ideal network side input power as a target, carrying out the harmonic injection of a q-axis current given reference value Iq0, and obtaining a reference value Iq0; and performing harmonic injection on a d-axis current given reference value Id0 to obtain a d-axis current reference value # imgabs1 #, performing PI control on differences between the d-axis current reference value and the q-axis feedback current and between the d-axis current reference value and the q-axis current reference value and between the d-axis current reference value and the q-axis feedback current after PI control is performed on the d-axis current reference value and the q-axis current reference value, adding the d-axis current reference value and the q-axis current reference value to d-axis feed-forward structure voltage and q-axis feed-forward structure voltage of the motor to obtain a d-axis current reference value # imgabs0 # and a q-axis current reference value # imgabs1 #. And 4, obtaining d and q axis voltage reference values # imgabs2 #, converting # imgabs3 # into alpha and beta axis voltage reference values, and generating PWM (Pulse Width Modulation) signals for controlling each switching tube in the inverter. According to the invention, on the premise of not increasing extra hardware cost, the torque ripple of the output torque is effectively reduced, and meanwhile, a high input power factor is realized.

The invention relates to an anti-radiation D flip-flop based on interconnection line crosstalk calculation. The anti-radiation D flip-flop comprises a cascade structure of a master latch module and a slave latch module, the primary latch module converts an input signal into a dual-node redundant signal through a first interconnection line crosstalk circuit (CC1), and logic storage of triggering high output only by dual high input is realized by capacitive coupling of L1-L3 and L2-L3; the slave latch module generates redundant signals L4 / L5 through a second interconnection line crosstalk circuit, and error correction is carried out on CC2 output and direct transmission signals in combination with a Muller C unit. The D flip-flop only needs 16 transistors with the minimum size, and the number of the transistors is reduced by 67% compared with that of a traditional TMR; asynchronous reset is supported, and the L3 / L6 is forced to be charged to a high level during reset; the capacitive coupling strength is controlled through metal layer wiring, and the reliability of a spaceflight electronic system in a radiation environment is remarkably improved.

The invention discloses an analog quantity detection system with a protection circuit, and relates to the analog quantity detection system with the protection circuit, which comprises a detection circuit connected with an analog signal through a wiring terminal, the protection circuit and an MCU (Microprogrammed Control Unit), compared with a detection system of a traditional operational amplifier, the instrument amplifier is adopted for detection, and the detection system has the advantages of being ultrahigh in input impedance, extremely good in CMRR, low in input offset, low in output impedance and capable of amplifying signals under common-mode voltage. The circuit also has the functions of high common-mode rejection ratio, low noise, low linear error, low offset voltage and offset voltage drift, and low input bias current and offset current error, and by arranging an AD input clamping protection circuit, when the system has a fault and the voltage suddenly rises, the clamping function is realized by using the unilateral conductivity of a diode, and the phenomenon that the voltage of a sampling port is larger than 5V is prevented. And the ADC port of the MCU is damaged.

The invention provides a wide-range high-sensitivity passive rectifier. The wide-range high-sensitivity passive rectifier comprises a differential signal input end; the rectification circuit comprises a plurality of rectification NMOS tubes and a plurality of rectification PMOS tubes; substrates of the plurality of rectification PMOS tubes are connected with an output positive electrode of the rectifier, and substrates of the plurality of rectification NMOS tubes are connected with an output negative electrode of the rectifier; the feedback biasing circuit comprises a plurality of feedback PMOS (P-channel Metal Oxide Semiconductor) tubes and is used for adaptively controlling the highest grid voltage of the plurality of rectification NMOS (N-channel Metal Oxide Semiconductor) tubes; and the number of the plurality of rectification NMOS tubes is the same as that of the plurality of rectification PMOS tubes. The rectifier is based on the feedback bias circuit, the grid voltage of the rectification NMOS tube can be increased under low input power, forward current is expanded, and therefore sensitivity is improved; and meanwhile, the bias voltage is adaptively reduced under high input power, the grid voltage of the NMOS tube is clamped and rectified, the reverse current is effectively inhibited, and the wide dynamic range of the rectifier is expanded.

The low-frequency electromagnetic wave has the characteristics of high penetrability and low signal attenuation, and can be widely applied to the fields of underground communication, underwater communication and the like. Most existing low-frequency transmitting antennas are electrically small antennas, have the problems of large size, complex equipment, short transmission distance and the like, and are difficult to meet actual requirements. The invention relates to a high-power pulse low-frequency antenna based on a Tesla coil. The high-power pulse low-frequency antenna is a high-power pulse transmitting antenna composed of a solid-state double-resonance Tesla circuit, a transformer, a primary coil and a secondary coil. The antenna adopts a high-voltage pulse generated by a Tesla circuit for feeding, and meanwhile, a transformer type impedance matching network is combined, so that the feed power is maximized. The radiation coil selects a primary and secondary nested coupling structure, the working frequency is accurately adjusted to be the output frequency of the Tesla circuit by respectively connecting resonant capacitors in series to the primary and secondary coils, and effective amplification of radiation signals is realized based on a magnetic coupling effect. The size of the coil is in the sub-cubic meter level and is within one thousandth of the working wavelength. Aiming at the antenna design difficulty in long-wave communication, the antenna has the advantages of high input power, long-distance transmission and small physical size, and has potential application value in the fields of cross-medium communication, emergency management communication and the like.

Technologies are provided to calculate a logarithm of an input current to a logarithmic transimpedance amplifier device at a particular temperature. The logarithm of the current is calculated in digital domain based on sampling of analog signals that are internal to the logarithmic transimpedance amplifier device. The sampling can be performed, in some cases, by an analog-to-digital converter device integrated into the logarithmic transimpedance amplifier device. The calculation in digital domain is performed by one or more processor external to the logarithmic transimpedance amplifier device. The calculation includes a determination of a temperature compensation factor based on an internal analog signal indicative of temperature of the logarithmic transimpedance amplifier device. The temperature compensation factor permits removing temperature dependence from a logarithmic output voltage originating from the input current. Operating in the digital domain permits applying corrections that account for residual leakage current and an emitter-resistance correction at high input currents.

A voltage selector includes a first input terminal for receiving a first input voltage, a second input terminal for receiving a second input voltage, an output terminal, a main select circuit and a reference circuit. The main select circuit includes a select unit for outputting a higher input voltage as an output voltage to the output terminal, and an auxiliary unit for pulling up the output voltage to the first input voltage according to a reference voltage when the first input voltage equals to the second input voltage. The reference circuit pulls up the reference voltage according to a higher one of the first input voltage and the second input voltage, and pulls down the reference voltage when the first input voltage equals to the second input voltage and the output voltage is lower than the first input voltage by a threshold voltage.

Technologies are provided to calculate a logarithm of an input current to a logarithmic transimpedance amplifier device at a particular temperature. The logarithm of the current is calculated in digital domain based on sampling of analog signals that are internal to the logarithmic transimpedance amplifier device. The sampling can be performed, in some cases, by an analog-to-digital converter device integrated into the logarithmic transimpedance amplifier device. The calculation in digital domain is performed by one or more processor external to the logarithmic transimpedance amplifier device. The calculation includes a determination of a temperature compensation factor based on an internal analog signal indicative of temperature of the logarithmic transimpedance amplifier device. The temperature compensation factor permits removing temperature dependence from a logarithmic output voltage originating from the input current. Operating in the digital domain permits applying corrections that account for residual leakage current and an emitter-resistance correction at high input currents.

The invention relates to the technical field of power management, in particular to an LDO (low dropout regulator) circuit with a wide input voltage range, which comprises a pre-voltage-stabilizing module, a band-gap reference module, an error amplification module, a voltage-stabilizing control module and a power tube, the pre-voltage-stabilizing module is used for preprocessing a wide-range input voltage into a stable low power supply voltage; the band-gap reference module is used for converting the low power supply voltage into a reference voltage; the error amplification module is used for amplifying the difference value between the reference voltage and the feedback voltage of the output circuit into a high-gain and low-noise control signal; the control signal drives the power tube after being compensated and buffered by the voltage stabilization control module, and the power tube converts the wide input voltage into an LDO output signal. Only one LDO main body circuit is adopted, the wide input voltage range can be achieved, high input voltage can be adapted, low input voltage can also be adapted, the use number of components of an LDO chip is reduced, and the occupied area of the chip is greatly reduced.

The utility model relates to the technical field of power electronics, in particular to a power circuit for an electrostatic probe system and the electrostatic probe system.The electrostatic probe system comprises an electrostatic probe, an electrostatic probe driving device and the power circuit, and the power circuit comprises a plurality of DC / DC converters which are input in parallel and output in series; the power supply is connected between the power supply and the electrostatic probe driving device; a higher input current requirement is met through parallel input, and low-voltage input and high-voltage output are realized through a series output mode so as to meet a high-voltage requirement required by an electrostatic probe system. And the plurality of time delay circuits are in one-to-one correspondence with the plurality of DC / DC converters, the input ends of the time delay circuits are connected to a power supply, the output ends of the time delay circuits are respectively connected to the time delay enabling ends of the DC / DC converters, and the time delay circuits are used for carrying out peak shifting starting on the plurality of DC / DC converters. Stable starting of the power supply circuit is ensured, and large current impact generated by parallel input is prevented.

A novel frequency tunable bi-directional phased array processing consisting of variable phase shifting and amplitude adjustment which employs a vector modulator and active combiner and splitter is proposed. Advantages of the proposed bi-directional a phased array processing includes the following 1) compact size; 2) high efficiency; 3) reduced passive trace loss and power consumption; 4) active current combining; 5) high input-output isolation; 6) high resolution and precise gain control and unequal combining or splitting; 7) phase-invariant amplifier design; 8) high accuracy and high-resolution phase shifter; 9) frequency tunability, within a small frequency range and / or a large frequency range; and 10) optimal unequal combining or splitting.

The invention relates to the technical field of integrated circuits, and discloses a high-pass filter circuit and a low-noise and high-common-mode-rejection-ratio high-speed instrument amplifier, and the low-noise and high-common-mode-rejection-ratio high-speed instrument amplifier comprises a high-pass filter circuit which is used for providing a high-pass filtering function; the input end of the current feedback instrument amplifier circuit is connected with the high-pass filter circuit and used for providing high input impedance and a high common-mode rejection ratio, and the input end of the transconductance amplifier circuit is connected with the output end of the current feedback instrument amplifier circuit and used for improving the load driving capacity; wherein the high-pass filtering circuit adopts a connection mode of a small-capacitance capacitor and an adjustable pseudo resistor to realize high-pass filtering, and the small-capacitance capacitor refers to an on-chip capacitor of which the capacitance value is less than 100pF so as to realize complete integration. The instrument amplifier effectively solves the problem that a traditional instrument amplifier cannot have high speed, low noise, high common-mode rejection ratio and direct-current voltage offset suppression at the same time.

Embodiments herein describe a voltage regulator with at least one power stage (or phase) that includes circuitry for providing an efficiency mode for low power situations. For example, when an output voltage and current of the power stage is below a threshold, the voltage regulator can switch to the efficiency mode (e.g., a high efficiency mode (HEM)). When in the efficiency mode, the power stage can use a first, lower input voltage to perform pulse width modulation (PWM). However, when in a high power mode, the power stage can use a second, higher input voltage to PWM. For example, the power stage can include one or more switches for switching between the first and second input voltages to use in the different modes of operation.

The embodiment of the invention provides a multi-lead wireless wearable myoelectricity acquisition system, and belongs to the crossing field of biomedical engineering and electronic technology. The electromyographic acquisition system comprises an electromyographic electrode pair module used for acquiring electromyographic signals and sending the electromyographic signals to an active circuit module; the active circuit module is used for processing the received electromyographic signals so as to improve the anti-interference capability and the acquisition accuracy, and sending the processed electromyographic acquisition input signals to the electromyographic acquisition module; due to the special design of the active circuit module, the active circuit module has the characteristics of ultrahigh input impedance, low voltage noise, bias current and the like, noise interference of electromagnetism, environment, motion and the like can be effectively resisted, meanwhile, power frequency interference is further reduced by processing common-mode signals through the auxiliary driving module, the stability and reliability of electromyographic signal acquisition in a complex environment are ensured, and the electromyographic signal acquisition efficiency is improved. And signals can be accurately acquired in sports venues or places with dense electronic equipment.

An amplifying device includes a main amplifier; a first feedback circuit coupled between an input terminal of the main amplifier and an output terminal of the main amplifier; an input coupling circuit coupled between the input terminal of the main amplifier and a first node; and an amplifying feedback circuit coupled between the output terminal of the main amplifier and the first node, wherein the first feedback circuit and the amplifying feedback circuit are negative feedback circuits.

The invention belongs to the technical field of power grid voltage control, and particularly discloses a voltage control method of a photovoltaic grid-connected system, which comprises the following steps of: setting an optimization process comprising a duty ratio control scheme; all duty ratio control schemes and corresponding input power are optimized through an optimization process; outputting and controlling a direct current side according to the duty ratio control scheme with the highest input power; active power and reactive power are determined in real time through a duty ratio control scheme; resolving a coupling relationship between the active power and the reactive power in the two-axis coordinate system to obtain a voltage state variable and a current state variable on each coordinate axis; calculating a voltage estimation value and a current estimation value on each coordinate axis through a voltage state variable and a current state variable under the condition of considering a disturbance error, and controlling an alternating current side according to the voltage estimation value and the current estimation value; the method has the advantages that the energy efficiency and stability of the direct current side are enhanced through multi-scheme optimization and dynamic selection, transient events are quickly responded, and high-quality electric energy supply and power grid stability are ensured.

The invention discloses a multi-inductor multi-output DC voltage converter and a control method thereof, the converter comprises a plurality of basic unit modules and a charge redistribution module, the plurality of basic unit modules are connected in series, and the plurality of basic unit modules are all connected with the charge redistribution module. The method comprises the steps that according to an input voltage signal, based on a basic unit module, a first inductor is sequentially and alternately magnetized and demagnetized in a complete period, and load end output current and load end output voltage are obtained; and obtaining the first flight capacitance current, combining the load end output current and the load end output voltage, performing adjustment processing on the inductance current based on a charge redistribution module, and outputting the adjusted inductance current. According to the embodiment of the invention, the capability of supporting higher input voltage and more output channels can be enhanced, and external elements are reduced, so that the conversion efficiency of the system is improved. The method can be widely applied to the integrated circuit design technology.

A lavalier microphone has improved dynamic range. The lavalier microphone incorporates a pair of microphone transducer elements into the same housing or attached housings, with one of the microphone transducer elements being more sensitive to acoustic input than the other. The voltage signals from the respective transducer elements are processed and combined, resulting in a digital output audio signal with improved signal to noise both at lower and higher input acoustic levels.

The invention discloses a reconfigurable charge pump circuit applied to a radio frequency energy acquisition system. The reconfigurable charge pump circuit comprises a charge pump clock generation module, a multi-stage charge pump, a field effect transistor switch module, an intermediate node voltage detection module and an output voltage stabilization module, dC voltages of the radio frequency rectifier under different input power conditions are received, the DC voltages are boosted into output signals of the multi-stage charge pump through the multi-stage charge pump, and power is supplied to subsequent loads through the output voltage stabilization module; the intermediate node voltage detection module detects the node voltage between the first two stages of charge pumps and the second two stages of charge pumps, and generates different enable signals to control the field effect transistor switch module according to whether the node voltage exceeds a threshold value or not, so that switching of the charge pumps in different working stages is realized, and reconfiguration is realized. According to the invention, stable output voltage can be obtained under the conditions of low input voltage and high input voltage, good output performance is shown, and the circuit is very suitable for the condition of input power fluctuation of a radio frequency energy acquisition system.

This invention relates to the field of pulse circuit technology and discloses a high-efficiency AC power line zero-crossing detection chip, including a path selection module, a signal processing module, and a driving module. The path selection module switches the charging circuit according to the potential of the internal power supply capacitor. The signal processing module uses a feedback loop to adjust the switching level of the sampling branch and generate a zero-crossing trigger pulse signal. The driving module responds to the zero-crossing trigger pulse signal by segmentally turning on the internal power supply capacitor and the external energy supply capacitor in the initial and subsequent stages of the zero-crossing point. This invention solves the contradiction between the ultra-high input impedance sampling environment and the driving strength through a controlled hysteresis window and a segmented current injection mechanism, suppresses signal jitter, improves the timing accuracy of zero-crossing detection, and effectively reduces the static power consumption of the system.

The air conditioner comprises a refrigerant circulation loop, a condensation temperature sensor, a PFC circuit and a controller, and the controller is configured to obtain the current effective value, the voltage peak value, the condensation temperature, the compressor operation frequency and the actual bus voltage value of alternating current input voltage; determining a bus coefficient according to the current effective value and the voltage peak value, or determining a target coefficient according to the current effective value, the voltage peak value, the condensation temperature and the compressor operation frequency; determining a target bus voltage value according to the product of the voltage peak value and the target coefficient; and generating a voltage control instruction according to the target bus voltage value and the actual bus voltage value, and outputting the voltage control instruction to the PFC circuit, so that the PFC circuit controls the on-off state of an internal switching tube based on the voltage control instruction, and the actual bus voltage value reaches the target bus voltage value. The overhigh bus voltage caused by the adoption of the fixed bus voltage under the condition of light load or high input voltage is avoided, and unnecessary switching loss is inhibited.

The utility model provides an auxiliary power supply starting circuit with high input voltage, a switching power supply and electronic equipment. The circuit comprises a pre-starting circuit and a pre-charging circuit, the pre-charging circuit comprises a constant current charging circuit, an energy storage circuit and a protection circuit. The constant current charging circuit comprises a first NMOS tube and a first resistor. The input end of the pre-starting circuit is electrically connected with an input power supply, and the output end is electrically connected with the input end of the protection circuit; a first output end of the protection circuit is electrically connected with a grid electrode of the first NMOS tube, and a second output end of the protection circuit is electrically connected with a second end of the first resistor; the drain electrode of the first NMOS tube is electrically connected with an input power supply, and the source electrode is electrically connected with the first end of the first resistor; the first end of the energy storage circuit is electrically connected with the second end of the first resistor and the power supply end of the power supply control chip, and the second end is grounded. According to the auxiliary power supply starting circuit with the high input voltage, the constant-current charging circuit can be started through the pre-starting circuit to charge the energy storage circuit, and rapid starting of the auxiliary power supply is achieved.