452 results about "Resistance capacitance" patented technology

The invention relates to an FOC control method based on an automobile air conditioner module motor without a Hall sensor, and belongs to the technical field of automobile electronics. The method comprises the following steps: injecting double-frequency voltage pulses into a stator in stages to position a rotor; collecting current through a sampling resistor and filtering to construct a rotor flux linkage distribution model, and presetting rectangular axis current in combination with noise reduction of a miniature acoustic sensor and air speed gear of an air conditioner; an extended Kalman filter observer is adopted to reversely deduce the load torque, and the torque change rate is monitored to trigger instantaneous load impact protection; the voltage space vector amplitude is corrected through voltage feed-forward compensation, a resistor-capacitor series filter circuit is additionally arranged, and phase dislocation pulse width modulation is adopted for resisting interference; and establishing a motor efficiency-rotating speed-load three-dimensional optimization method, starting dynamic flux-weakening control, and estimating the winding temperature through the stator resistance to adjust the flux-weakening depth. Accurate starting and dynamic load adaptation of the Hall-sensor-free motor are achieved, starting out-of-step and noise exceeding are avoided, and stable air volume of an automobile air conditioner and long-term reliable operation of the motor are guaranteed.

The application discloses a preparation method of a resistance / capacitance dual-response MXene-based hydrogel flexible sensor, and the hydrogel flexible sensor is prepared by combining a microstructure hydrogel prepared from polyacrylamide, gelatin and MXene with an interdigital electrode. The hydrogel flexible sensor can simultaneously detect resistance response signals and capacitance response signals. The detected resistance and capacitance signals are complementary to each other, the single response signal mode of the flexible sensor is widened, the mutual calibration of the same group of data is realized, and the detection precision of the flexible sensor is improved. The MXene-based hydrogel flexible sensor is applied to the detection of human biological signals, for example, carotid artery pulse detection and radial artery pulse detection.

The invention relates to the technical field of on-line monitoring, in particular to an insulation fault on-line monitoring method and system for a medical IT system control cabinet. The method comprises the following steps: selecting a non-integer frequency multiplication detection frequency according to equivalent ground distributed capacitance in a previous monitoring period, and superposing the non-integer frequency multiplication detection frequency with a fundamental frequency to form a composite signal injection system; collecting signals to calculate a voltage instantaneous harmonic distortion rate change gradient, and selecting a time window to split the leakage current according to the change gradient; on the basis of dispersion estimation signal-to-noise ratio weighted fusion current vectors, insulation resistance and distributed capacitance are calculated; constructing a four-dimensional original feature vector composed of the insulation parameter, the phase difference and the intermodulation component energy; constructing a diagonal weighting matrix based on the resistance-capacitance ratio and the gradient to transform a feature vector, and determining the fault attribution through the Mahalanobis distance calculation with the fault template library. According to the scheme, harmonic interference can be avoided, calculation stability can be improved, insulation instantaneous sudden change can be quickly responded, and different fault types can be accurately distinguished to guide maintenance.

The invention discloses a high-precision integrated temperature and humidity sensor and a construction method. The sensor comprises an MEMS humidity capacitance sensor, a CMOS integrated temperature sensor, an analog-to-digital converter, a calibration configuration information storage array and a digital interface. Wherein the MEMS humidity capacitance sensor and the CMOS integrated temperature sensor are respectively connected with the analog-to-digital converter, and voltage signals of the MEMS humidity capacitance sensor and the CMOS integrated temperature sensor are converted into digital signals; the analog-to-digital converter transmits the digital signal to the calibration configuration information storage array for data processing and linearization processing, and transmits the data to the SDAamp through a digital interface; in SCL; wherein the MEMS humidity capacitance sensor comprises a capacitance pole plate, a protection ring and a heating resistor; the capacitor plates adopt an interdigital capacitor structure and have a regular octagonal part in overlook observation, and meanwhile, the upper and lower electrode plates and the polyimide PI material layer between the two electrode plates form the interdigital capacitor structure.

The invention discloses a classification code and description code combination-based electronic material coding method and system, and the method comprises the steps: formulating an 11-bit pure digital coding rule, taking the first three bits as classification codes, and distinguishing the paster / plug-in packaging, basic types and specific types of materials; the last eight bits are description codes and are divided into two types according to material characteristics: for materials with nominal values, such as resistors and capacitors, nominal value codes converted based on a scientific counting method are combined with conventional attribute codes of precision, packaging and the like; for materials without nominal values, such as chips, PCB finished products and the like, the combination of model codes and serial number codes is adopted; a classification code and a description code are automatically generated by analyzing the BOM and are compared with a database to process conflicts. According to the method, the coding rule has intuition and uniqueness, the problems that traditional serial number coding is poor in readability and prone to code repetition are effectively solved, and the efficiency and accuracy of electronic material management are remarkably improved.

The invention relates to a voltage output method and system based on a high-voltage power supply widening controller, and belongs to the technical field of high-voltage power supplies. The method comprises the following steps: acquiring a wide-range voltage parameter, and dividing a frequency control region and a pulse width modulation control region of a high-voltage power supply through an arbitration control algorithm to obtain switching judgment information of a power supply working region; constructing a working area switching logic according to the resistance-capacitance network, executing the working area switching logic through a frequency pulse correlation algorithm, coordinating the pulse width and the working frequency, and generating a double-modulation execution signal; a closed-loop negative feedback mechanism is established, and a wide-range overvoltage-free voltage regulation and control instruction is obtained by combining a proportional-integral compensation circuit with a resistance measurement full-right control working frequency and a pulse width; and broadening the output voltage range and inhibiting the overshoot voltage through power supply power driving, coordinating the working frequency and the pulse width in combination with the wide-range overvoltage-free voltage regulation and control instruction, and outputting the wide-range voltage of the high-voltage power supply.

The invention discloses a voltage and current synchronous measurement method for a high-voltage power supply of a fusion device, which is suitable for accurately sampling and monitoring voltage and current signals of each key node of the high-voltage power supply of the fusion device. According to the method, firstly, a resistance-capacitance voltage division technology is adopted, a front-end high-voltage attenuation network is constructed by utilizing high-precision resistors and capacitors, and stable voltage division and linear attenuation of high-voltage signals are achieved; then, electrical isolation is realized through a small-signal voltage and current transformer, and multi-channel synchronous acquisition of voltage and current signals is completed respectively. Then, the ADC module adopts two multi-channel AC sampling special electric energy metering chips to realize ten-channel synchronous acquisition of high voltage and current signals. And finally, the FPGA receives, processes and analyzes the acquired data in real time, and transmits a result to an upper computer monitoring platform. According to the method, the synchronism, the precision and the anti-interference performance of a fusion power supply high-voltage measurement system are remarkably improved, and reliable data support is provided for safe and stable operation of a fusion device.

The application belongs to the technical field of electronic component recycling, in particular to a waste electronic component recycling device, which comprises a workbench, a clamping assembly is arranged on the upper end of the workbench, the clamping assembly comprises a first rectangular plate which is slidably arranged on the upper end of the workbench, two clamping strips are slidably arranged on the upper end of the first rectangular plate, a cylinder is slidably arranged on one side of the upper end of the first rectangular plate, a through hole is formed in the lower end of the cylinder, a hot air blower is arranged on one side of the cylinder, a baffle is arranged on the middle of the upper end of the workbench, a crushing box is arranged on one side of the workbench, an extrusion roller is rotatably arranged in the crushing box, and a discharge port is arranged on one side of the lower end of the crushing box. The device can automatically remove the resistors, capacitors and other components on the surface of the circuit board by using the heating separation method, without damaging the circuit board and the resistors, capacitors and other components, thereby reducing the harm of harmful substances to the environment.

Various embodiments of the present disclosure are directed towards an integrated circuit (IC) in which cavities separate wires of an interconnect structure. For example, a conductive feature overlies a substrate, and an intermetal dielectric (IMD) layer overlies the conductive feature. A first wire and a second wire neighbor in the IMD layer and respectively have a first sidewall and a second sidewall that face each other while being separated from each other by the IMD layer. Further, the first wire overlies and borders the conductive feature. A first cavity and a second cavity further separate the first and second sidewalls from each other. The first cavity separates the first sidewall from the IMD layer, and the second cavity separates the second sidewall from the IMD layer. The cavities reduce parasitic capacitance between the first and second wires and hence resistance-capacitance (RC) delay that degrades IC performance.

The invention belongs to the technical field of integrated circuits, and particularly relates to a radio frequency amplifier bandwidth expansion circuit based on resistor-capacitor series feedback. The bandwidth expansion circuit comprises a first-stage common-gate amplifier, a second-stage common-source amplifier, a transformer-based inter-stage matching network between the two stages of amplifiers, and two resistor-capacitor series feedback paths, and a resistor-capacitor series feedback path is bridged at two sides of the interstage matching network, and feedback is introduced from the output end of the common source amplifier to the output end of the common gate amplifier, so that the quality factors of two resonant cavities of the interstage matching transformer are adjusted, and the targets of adjusting the gain of the amplifier and expanding the bandwidth of the radio frequency amplifier are further realized.

The invention relates to the technical field of radio frequency integrated circuits, and discloses a low-noise voltage-controlled oscillator circuit which comprises a source electrode following low-noise bias circuit with digital calibration, a source electrode following low-noise bias circuit with digital calibration, a source electrode following low-noise bias circuit with digital calibration and a source electrode following low-noise bias circuit with digital calibration, the cross-coupled amplifier array is composed of a plurality of units, and the source electrode of the cross-coupled amplifier array suppresses low-frequency noise through a resistance-capacitance feedback network and receives a digital amplitude calibration signal so as to dynamically adjust the number of working units and stabilize the output amplitude; the amplitude self-calibration loop consists of digital logic and a peak detector; the switched capacitor unit array is provided with stable direct-current bias; and a wide linear variable capacitor array driven by the stepped bias voltage. Through deep fusion of digital and analog technologies, the phase noise is remarkably reduced, the linear tuning range is widened, the amplitude stability is ensured, the power consumption is reduced, and the method is particularly suitable for a high-performance radio frequency communication chip of the Internet of Things.

The invention discloses an electrolytic capacitor pin defect detection device, and relates to the field of electrolytic capacitor pin detection.The electrolytic capacitor pin defect detection device comprises an equipment frame body, a conveying assembly is arranged in the equipment frame body, and the conveying assembly comprises a driving roller and a driven roller which are installed in the equipment frame body; the outer wall of the driving roller and the outer wall of the driven roller are each sleeved with a rotating roller and a chain wheel, a motor is arranged at one end of the driving roller, a chain is arranged on the outer wall of the chain wheel, the outer walls of the rotating rollers are sleeved with a conveying belt, and a stirring assembly is arranged on one side of the chain. The problem that the detection work efficiency is low when an existing resistor capacitor is detected is solved, the resistor capacitor is placed above the rolling wheels, the stirring assembly can correct the resistor capacitor, the pin of the resistor capacitor is in a horizontal state, and the detection efficiency of the resistor capacitor is improved. Whether the resistor and capacitor pins have flaws is judged by observing the universal meter, and the resistor and the capacitor do not need to be manually taken for detection, so that the working efficiency is improved.

The embodiment of the invention provides a method and a system for charging a bootstrap capacitor of an electric compressor controller. The method comprises the following steps: S1, calculating time required for fully charging the bootstrap capacitor according to resistance and capacitance values of a bootstrap charging circuit; s2, the minimum duty ratio is set based on the driving control frequency of the controller, and the single switching charging duration of the bootstrap capacitor is calculated; s3, working time of low-voltage side switch tubes in the three single-phase half-bridge units is calculated; and S4, controlling the bootstrap capacitor of the corresponding single-phase half-bridge unit to be charged to a required voltage value. Relates to the field of new energy automobile electric compressors. The time required for fully charging the bootstrap capacitor is accurately calculated according to the resistance and capacitance values of the bootstrap charging circuit, so that the charging efficiency and the driving stability of the high-voltage side switching tube are improved, and the bootstrap charging circuit is particularly suitable for reliable operation of a new energy truck in frequent start-stop and high-load scenes.

The invention discloses a circuit and a method for demodulating current received by an instrument bus host, and relates to the technical field of instruments. The current demodulation circuit comprises an adder, the first input end of the adder is connected with an instrument bus MBUS to receive MBUS signals, the second input end of the adder receives reference voltage signals, and the output end of the adder outputs summing voltage signals; the resistor and capacitor charging and discharging device is connected with the output end of the summator so as to process the summing voltage signal; and the reverse input end of the comparator receives the MBUS signal, and the positive input end of the comparator receives the summing voltage signal processed by the resistor-capacitor charging and discharging device so as to determine the logic level corresponding to the MBUS signal based on the signal level of the output end of the comparator. According to the invention, the problem that the MBUS host receiving circuit cannot be compatible with all MBUS meters is solved.

The invention discloses a lithium ion battery charge state estimation method, device and equipment and a storage medium, and relates to the technical field of battery detection, and the method comprises the steps: replacing an ideal capacitor in a second-order resistance-capacitance equivalent circuit model with a constant phase element to construct a fractional-order second-order equivalent circuit model, carrying out discretization processing to obtain a state space equation and a state space expression; identifying model parameters by using a whale algorithm, determining a historical open-circuit voltage estimated value in combination with charging and discharging experimental data, a state-space equation and a state-space expression, and constructing a historical feature vector in combination with a historical terminal voltage measured value and a historical current measured value of the lithium ion battery; a time sequence feature is extracted by fusing an improved long-short-term memory structure, feature association is optimized through a time-enhanced attention mechanism, a time sequence prediction model is trained, and a state-of-charge estimation value is determined based on the model, a current terminal voltage measurement value, a current current measurement value and a current open-circuit voltage estimation value, so that the efficiency of estimating the state-of-charge of the battery is improved.

The invention provides a method for estimating the state of charge of a marine lithium iron phosphate battery based on model compensation and improved Kalman filtering. The method comprises the following steps: acquiring voltage and current data of the marine lithium iron phosphate battery; constructing a novel compensation model taking an improved Play hysteresis operator as a core, and quantifying the hysteresis voltage of the battery; on the basis of a second-order RC equivalent circuit model, hysteresis voltage is used as voltage input of an ideal voltage source in the battery and is injected into model internal resistance and capacitance parameter values obtained through identification at different temperatures, and an equivalent circuit model considering hysteresis at different temperatures is formed; performing parameter identification on the equivalent circuit model with hysteresis compensation by adopting an adaptive forgetting factor recursive least square method, and adaptively optimizing a forgetting factor and an initial parameter value, so that an error between a terminal voltage value simulated by the equivalent circuit model and an actual voltage value is minimum; and carrying out joint estimation on the battery end voltage and the SOC by adopting an adaptive square root unscented Kalman filtering algorithm, so that the error of the end voltage is minimum, and an estimated value of the battery SOC is obtained.

The invention relates to the technical field of signal processing, in particular to a local circuit of an electronic system or electronic equipment for digital information transmission, and provides a front-end receiving circuit. The circuit comprises a first-stage amplifier and a second-stage amplifier, wherein the first-stage amplifier comprises an input transistor pair, a cross-coupled load arranged on the load side of the input transistor pair and an adjustable resistance-capacitance unit arranged on the bias side of the input transistor pair; the second-stage amplifier is used for carrying out first-time swing amplification on the output differential signal of the first-stage amplifier under the action of the bias current source, so that the common-mode level of the output differential signal of the first-stage amplifier is increased to the common-mode level of the output differential signal of the second-stage amplifier; and the third-stage amplifier is used for carrying out second-time swing amplification so as to increase the common-mode level of the output differential signal of the second-stage amplifier to the common-mode level of the output differential signal of the third-stage amplifier. Therefore, the high-efficiency front-end receiving circuit capable of overcoming waveform distortion is realized.

The utility model provides an intelligent control silicon controlled rectifier stable output circuit. The intelligent control silicon controlled rectifier stable output circuit comprises a silicon controlled rectifier signal input circuit, a rectification filter circuit, an intelligent control dimming module and a load power supply circuit. The rectification filter circuit is connected with the output end of the silicon controlled signal input circuit and is connected with the load power supply circuit through the active damping circuit. The intelligent control dimming module forms a control loop with a rectification filter circuit and a load power supply circuit through a plurality of electronic switch tubes, resistors, capacitors and other elements. When sine wave alternating current is input, the load power supply circuit outputs the maximum output current to the LED load; when a phase switching signal is input, the signal control end of the intelligent control dimming module outputs a high level, so that electronic switching tubes in the dummy load holding circuit and the small board load holding circuit are conducted and form a current loop, and therefore, a silicon controlled rectifier can obtain enough holding current and work stably; and the stability of the intelligent control silicon controlled rectifier stable output circuit is improved.

A calibration circuit and an electronic device belong to the technical field of detection, the calibration circuit is connected with a differential probe, and a sampling circuit performs voltage sampling on an output signal to output a sampling signal; the control circuit outputs a first control signal according to the sampling signal; the direct current bias calibration circuit outputs a first adjusting voltage according to the first control signal; the signal conditioning circuit is further configured to perform direct current bias compensation on the single-ended signal based on the first adjusting voltage so as to output an output signal; therefore, the direct-current bias of the whole system returns to zero, the dependence of system errors on the precision of resistors, capacitors and active devices is reduced, and the accuracy of measurement results is improved.

The utility model provides a sequential control circuit with low cost and high precision, a driving circuit and a liquid crystal module. The sequential control circuit comprises a delay circuit module and an output module, the delay circuit module comprises a second voltage power supply end, a resistor R1, a capacitor C1, a precision timer U1 and a second voltage output end; one end of the capacitor C1 is connected with the second voltage power supply end, and the other end of the capacitor C1 is connected with the precision timer U1 and grounded through the resistor R1; the second voltage output end is connected with the output end of the precision timer U1; the output module comprises a first voltage power supply end, a control switch unit and a first voltage output end; the control switch unit is connected with the first voltage power supply end, the second voltage output end and the first voltage output end. According to the utility model, the voltage delay output can be accurately controlled, so that the power-on time sequence can be accurately controlled; in addition, an I / O port does not need to be occupied, and meanwhile the advantages of being low in cost and more flexible are achieved.

The invention relates to a voltage following module, a heat management controller water pump driving circuit and a vehicle. The voltage following module comprises an operational amplifier U1A, an operational amplifier U1B, resistors R1 to R6 and capacitors C1 to C3. The in-phase input end of the operational amplifier U1A is connected to a voltage P5VNor through a resistor R3; the anti-phase input end of the operational amplifier U1A is connected to a voltage P5VUp through a resistor R4, and the anti-phase input end of the operational amplifier U1A is also connected with the output end of the operational amplifier U1A through a resistor R6; the output end of the operational amplifier U1A is also connected to a voltage P5VUp through a resistor R2 and a resistor R1; and the reverse input end of the operational amplifier U1B is connected with the output end of the operational amplifier U1B to form a voltage follower structure. The problem of current sampling deviation caused by a voltage follower in a water pump driving circuit of an existing automobile heat management controller is solved.

A signal acquisition system and amplifier for resisting high-frequency interference include a signal terminal; a first filter circuit includes a first access point, a second access point, resistors R1, R2, and R3, and capacitors C1, C2, and C3; one end of resistor R1 is connected to the first access point, and the other end is connected to one end of resistor R2, the other end of resistor R2 is connected to the second access point, the end of resistor R1 connected to resistor R2 is also connected to one end of capacitor C3, and the other end of capacitor C3 is grounded; one end of capacitor C1 is connected to the first access point, and the other end is connected to one end of capacitor C2, the other end of capacitor C2 is connected to the second access point, the end of capacitor C1 connected to capacitor C2 is also connected to one end of resistor R3, and the other end of resistor R3 is grounded; the first filter circuit is connected in series with the first access point and the second access point to the signal terminal. Compared with traditional anti-interference filter structures, this invention can achieve better high-frequency interference resistance with a smaller on-chip cost.

The utility model relates to a low-cost protection circuit which comprises an input circuit, the output end of the input circuit is electrically connected with the power supply ends of a first control circuit, a second control circuit and an output control circuit at the same time, and the output end of the first control circuit is electrically connected with the grounding ends of the second control circuit and the output control circuit at the same time. The output end of the second control circuit is electrically connected with the control end of the output control circuit, and the input circuit, the first control circuit, the second control circuit and the output control circuit are all composed of discrete components. According to the scheme, the low-cost protection circuit is only composed of the two MOS tubes, the two voltage stabilizing diodes, the triode, the resistor, the capacitor and the switch, has the advantages of being simple in circuit and low in cost, and can achieve multiple protection functions of power supply overvoltage, undervoltage, reverse connection and surge current impact at the same time. The performance is reliable, an IC or an optocoupler or a single-chip microcomputer chip does not need to be arranged, programming codes are not needed, production is convenient, and the production efficiency is improved.

The utility model discloses a PFC (Power Factor Correction) detection circuit, which is characterized by further comprising an isolation circuit connected with a comparison circuit, the isolation circuit comprises a pin 1 of an optocoupler U2 connected with the comparison circuit, a resistor R4 connected with a pin 3 of the optocoupler U2, a capacitor C1 and a PFC MCU (Microprogrammed Control Unit) signal, a power supply end 3.3 V connected with the other end of the resistor R4, and a capacitor C1 connected with a pin 4 of the optocoupler U2, a pin 2 and a pin 4 of the optocoupler U2 and the capacitor C1 are grounded; according to the PFC detection circuit, through the arrangement of the isolation circuit, when the comparison circuit sends out a low signal, the optical coupler U2 is not started, the optical coupler U2 is not lowered and the output is high, and when the comparison circuit sends out a high signal, the optical coupler U2 is started, the optical coupler U2 is lowered after being started and the output is low, so that the purpose of high-voltage and low-voltage isolation is achieved, and a low-voltage part is protected from being broken down by high voltage; therefore, the electronic device is protected and has the characteristics of high voltage resistance, small damage to the electronic device and the like.

The utility model relates to the technical field of electrical components, and specifically relates to a large current filter, and the auxiliary device comprises a circuit board, a circular magnet, a rotating coil, a fixing block, a resistor and a capacitor. After the rotating coil is wound on the circular magnet, the contact area on the circuit board is connected, and then the appropriate resistor and capacitor are installed, so that the device can be used normally. The device assembles the capacitor, the resistor and the common mode inductance on one circuit board, reduces the space of the filter, reduces the loss, reduces the cost, effectively reduces the manufacturing difficulty by using the modular installation mode, has good practicability and economy, and is beneficial to the promotion and use of the device.

The invention discloses a power supply time sequence control circuit for a PCIe board card, relates to the technical field of power supply time sequence control, and aims to solve the problems of strong temperature sensitivity, insufficient precision, poor anti-interference capability and the like of a traditional power supply time sequence control scheme based on resistors and capacitors. The power supply time sequence control circuit comprises a power supply input module, a plurality of VRM modules and a control module, the control module starts a power-on process by detecting the stability of the power supply input module, monitors the state of the turned-on power supply by using a GPIO interface, and controls the enabling of the next-stage power supply according to a preset time sequence after confirming that the upper-stage power supply is stable, so that the orderly power-on of the multi-stage power supply is realized, and meanwhile, the circuit can be integrated with an electronic switch to realize the automatic switching of 12V voltage. The method is suitable for various PCIe board cards with high requirements on the power supply time sequence precision and stability, can effectively guarantee the stable operation of the board cards, and improves the reliability and adaptability of the whole power supply management.

The utility model discloses a metro vehicle main track fault generating device, which comprises a time controller, an output control circuit, an output relay and a wire harness automatic contraction mechanism which are connected in sequence, the output relay comprises an output relay coil and an output relay contact K1 which are connected, a device liquid crystal screen is further arranged on the time controller, and the device liquid crystal screen is connected with the output relay coil. The output control circuit forms an RC delay circuit through a resistor, a capacitor and other devices, the wire harness automatic contraction mechanism is connected with the metro vehicle main line fault generation device and a control circuit terminal strip of a vehicle, and the time controller, the device liquid crystal screen, the resistor, the capacitor and the output relay are integrated into a circuit board. The beneficial effects of the utility model are that the automatic control of fault occurrence is realized through the time controller, the concealment of fault hypothesis is increased, the emergency capability of a driver is effectively improved, the application range is wider, the simulation effect is more vivid, the labor cost is reduced, the authenticity of fault blind demonstration is improved, and the wear rate of original equipment is reduced.

Circuit structure comprising: a resistor-capacitor circuit (RC circuit) (110) having a first node (A), a second node (B) separated from the first node (A) by a resistive element (112) and a capacitive element (114), and a third node (C) between the resistive element (112) and the capacitive element (114); a trigger transistor (122) having a pair of source / drain (S / D) terminals connected between the first node (A) and the second node (B) in parallel with the RC circuit (110) and a gate terminal coupled to the third node (C) of the RC circuit (110); a mirror transistor (126) having a pair of S / D terminals coupled between the first node (A) and the second node (B) in parallel with the RC circuit (110), and a gate terminal coupled to the gate terminal of the trigger transistor (122), wherein a current through the pair of S / D terminals of the mirror transistor (126) is smaller than a current through the pair of S / D terminals of the trigger transistor (122); and a snapback device (130) having a gate terminal (T Gate ) for controlling the current flow in the snapback device (130), the snapback device (130) comprising: a P-well (142) having a first N-doped region (146) coupled to one of the first nodes (A), an N-well (144) adjacent to the P-well (142) and having a first P-doped region (148) coupled to the second node (B), wherein a current path from the first node (A) to the second node (B) runs through the snapback device (130) in parallel with the RC circuit (110), and at least one doped region within the P-well (142) or the N-well (144) coupled to a selected one of the pair of S / D terminals of the mirror transistor (126) and the gate terminal (T Gate ) of the snapback device (130), wherein the at least one doped region has a same doping type with respect to the P-well (142) or the N-well (144).

The utility model discloses a direct-current high-voltage hydrogen furnace igniter, which is characterized in that a controller of the igniter outputs and controls the on-off state of a power field-effect tube Q1 through an external resistor-capacitor PWM (pulse width modulation) signal and a frequency signal, and generates a pulse signal controlled by a duty ratio according to an input reference voltage VREF and a feedback voltage VFB; a pulse signal is coupled to the grid electrode of the power field effect transistor Q1 through a resistor-capacitor connected in parallel. When the power field effect transistor Q1 is switched on, the current passes through the primary coil of the transformer T1. In the conduction period, high-frequency current generated by the power field effect transistor Q1 is transmitted to the secondary coil through the mutual inductance effect of the transformer T1. And the input voltage of the secondary coil of the transformer T1 is boosted to about 20000V high voltage. A high-voltage rectifying silicon column is arranged in the transformer T1, so that 20000v direct-current voltage is output, and the voltage is ignition voltage. According to the utility model, the operation risk can be reduced, the ignition safety of the hydrogen furnace is improved, and the interference to control equipment and surrounding electronic equipment is reduced.