1055 results about "Triode" patented technology

The utility model relates to the related field of voltage reference circuits, in particular to a voltage reference circuit with a simple structure and capable of realizing high-voltage application, which comprises a resistor R5 connected with a high-voltage power supply, MOS (Metal Oxide Semiconductor) transistors PM1, PM2 and PM3, triodes Q0, Q1 and Q2, and MOS transistors NM0 and NM5, compared with a traditional structure, the circuit is simple in structure and easy to implement, and due to the fact that an operational amplifier and a band-gap reference circuit are not needed, and the number of electronic components is small, the circuit area is greatly reduced; the high-voltage-resistant voltage-reducing and voltage-stabilizing circuit is simple in structure, low in process requirement, free of a high-voltage process and free of additional special devices, adopts a low-voltage process to enable the circuit to generate a low-voltage reference capable of bearing a high-voltage power supply of more than 100V, achieves the purposes of high-voltage resistance, voltage reduction and voltage stabilization, and has the characteristics of low cost and convenience in design, so that the high-voltage-resistant voltage-reducing and voltage-stabilizing circuit has very high use value and application value and is suitable for popularization.

The utility model discloses an anti-reverse connection and anti-backflow circuit with an enabling function, comprising a main power supply module used for providing a DC input voltage; the micro-control unit is used for detecting the input voltage and the output voltage and generating an enabling control signal; the enabling switch circuit comprises two MOS (Metal Oxide Semiconductor) transistors which are reversely connected in parallel and is used for controlling the on and off of the circuit according to the enabling control signal; and the control module comprises a triode and is used for receiving an enabling control signal from the micro-control unit. According to the utility model, the MOS transistor and the triode which are reversely connected in parallel are used for controlling the circuit, so that safe and reliable control of a battery or a high-capacity load is realized, the functions of reverse connection prevention and backflow prevention are realized, the problems of a relay are solved, the integration level and reliability of the circuit are greatly improved, and the reliability of the circuit is improved. The method is suitable for various power supply management applications requiring high safety and high reliability.

The utility model relates to a rear-phase-cut single-live-wire type wall light modulator, which comprises an MOS (Metal Oxide Semiconductor) tube switch loop unit, a singlechip control unit and a direct-current power supply unit, the MOS tube switch loop unit comprises a wiring terminal J2 connected with an MOS tube Q1, a grid electrode of the MOS tube Q1 is connected with four resistors in series in sequence and then is connected with an MOS tube Q2, a drain electrode of the MOS tube Q2 is connected with a diode D2, the diode D2 is connected with a diode D1, a fixed end contact of a single-pole double-throw switch is connected with the MOS tube Q2, and two movable end contacts of the single-pole double-throw switch are connected with the wiring terminal J1 and the wiring terminal J3 respectively; the direct-current power supply unit comprises an alternating-current voltage waveform acquisition circuit, a direct-current voltage drop circuit, an overcurrent protection circuit and a filtering voltage stabilizing circuit; according to the single-chip microcomputer control unit, a linear sliding potentiometer is connected with the PC2 end of a single-chip microcomputer after being connected with a resistor in series, the linear sliding potentiometer and a rotary potentiometer are sequentially connected between the output end of the direct-current power supply unit and the ground in series, a triode Q6 is connected with a triode Q5 and then connected with the collector electrode of a triode Q7, and the base electrode of the triode Q7 is connected with the PA6 end of the single-chip microcomputer after being connected with a resistor in series.

The application relates to a high-order curvature compensation band gap reference circuit, which comprises a first-order band gap reference circuit, a high-temperature region curvature compensation circuit and a starting circuit. The first-order band gap reference voltage is realized by the following technologies: the voltage generated by the current of PMOS tube M4 on resistors R3-R4 and the voltage generated by the current of PMOS tube M6 on resistor R4 both have positive temperature coefficients, the voltage generated by the current of PMOS tube M5 on resistors R3-R4 and the voltage generated by the current of PMOS tube M7 on resistor R4 both have negative temperature coefficients; the working area of NMOS tube M13 gradually changes from the deep triode region, the triode region to the saturation region with the increase of temperature by controlling the working of NMOS tube M13 by the technology that the gate voltage of NMOS tube M12 increases with the increase of temperature, so that the current of PMOS tube M14 is high-order nonlinear with temperature, and the first-order band gap reference voltage is temperature compensated, thereby obtaining the high-order temperature compensation band gap voltage.

The invention provides a numerical control delayer, a four-digit numerical control delayer and a manufacturing method of a chip of the four-digit numerical control delayer. The delayer comprises a first single-pole double-throw switch, a second single-pole double-throw switch, a delay unit and a reference unit, the first single-pole double-throw switch comprises two stages of triodes S1 and S2 which are connected in parallel; the second single-pole double-throw switch comprises a triode S3 and a triode S4 which are connected in parallel; one end of the delay unit is connected with the drain electrode of S1, and the other end is connected with the drain electrode of S3; one end of the reference unit is connected with the drain of S2, and the other end is connected with the drain of S4; drain electrodes of the S1 and the S2 are connected with a radio frequency signal input port; drain electrodes of the S3 and the S4 are connected with a radio frequency signal output port; source electrodes of the S1, the S2, the S3 and the S4 are all in direct current grounding, grid electrodes of the S1, the S2, the S3 and the S4 are all connected with a voltage control unit, and on and off of each triode are controlled by controlling grid electrode voltage, so that the delayer is switched between a reference state and a delay state. According to the invention, the insertion loss of the delayer in the millimeter wave frequency band can be reduced.

The invention discloses a low-temperature-drift band-gap reference source circuit. The low-temperature-drift band-gap reference source circuit comprises a starting circuit, a PTAT current generating circuit, a CTAT current generating circuit and an output circuit. The PTAT current generation circuit is used for generating positive temperature coefficient current, and adopts a power supply voltage isolation structure consisting of two PMOS (P-channel Metal Oxide Semiconductor) tubes and two NMOS (N-channel Metal Oxide Semiconductor) tubes to isolate the interference of power supply voltage; the CTAT current generating circuit is used for generating a negative temperature coefficient current and adopts a clamping structure consisting of two triodes, so that the CTAT current generating circuit is not influenced by a power supply voltage; and the output circuit is used for outputting low-temperature-drift reference current and / or voltage. An operational amplifier clamping structure is not used, the complex structure of an integrated operational amplifier is omitted, the circuit structure is simplified, the area and power consumption are reduced, the influence of offset voltage of the integrated operational amplifier can be avoided, and practicability is high. In addition, the reference circuit further comprises a temperature compensation circuit, temperature high-order compensation is carried out through a feedback network formed by two resistors, and the reference current and the reference voltage are more accurate.

The invention relates to the technical field of power electronics, and provides a power supply slow start circuit and power supply equipment based on triode control, the slow start circuit comprises a power supply, a switch module, a load and a slow start control module, the power supply, the switch module and the load form a power supply loop, the slow start control module is connected with the power supply and the switch module, when the power supply powers on a load, a triode in the slow start control module is controlled to be in an amplification region, and the driving current of the switch module is shunted, so that the duration of the switch module in a Miller platform is prolonged; and the switch module is in a complete conduction state, so that the slow start of the load is realized. According to the slow start circuit, the conduction degree of the switch module can be controlled through the triode, and the duration of the switch module on a Miller platform is prolonged, so that surge suppression of load energizing current is realized, the adaptability is high, the interference resistance is strong, and the circuit stability is improved.

The invention discloses a driving circuit of a tunable laser, which comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a tenth resistor, a first operational amplifier, a second operational amplifier, a third digital potentiometer, a fourth operational amplifier, a first triode and a first voltage stabilizing diode, one end of the first resistor and one end of the fourth resistor are connected with a power supply, the other end of the first resistor is connected with the cathode of the first voltage stabilizing diode and the in-phase end of the second operational amplifier, and the anti-phase end of the second operational amplifier is connected with one end of the second resistor and one end of the third resistor. The output end of the second operational amplifier is connected with the other end of the second resistor and the anti-phase end of the first operational amplifier, the output end of the first operational amplifier is connected with one end of the tenth resistor and a second pin of the third digital potentiometer, and a seventh pin of the third digital potentiometer is connected with one end of the fifth resistor.

The utility model discloses a power supply input surge protection and isolation device, which comprises a piezoresistor, a surge decoupling power resistor and a TVS (Transient Voltage Suppressor) tube which are sequentially connected in series, and a self-adaptive surge control circuit which is connected with the surge decoupling power resistor in parallel, when surge overvoltage occurs, the TVS tube is firstly broken down, and transient large current flows through the adaptive surge control circuit; the surge decoupling power resistor is used for enabling the passing surge current to generate relatively large voltage drop after the TVS tube is broken down; the self-adaptive surge control circuit comprises a first MOS tube which is used for conducting transient large current passing through a TVS (Transient Voltage Suppressor) tube; when the voltage drop on the MOS tube is greater than the breakdown voltage of the voltage-regulator tube, the voltage-regulator tube is broken down to trigger the conduction of the triode; when the voltage-regulator tube is broken down, the triode is conducted, so that the GS voltage drop of the first MOS tube is reduced, and the first MOS tube is turned off; when the sum of the clamping voltage of the TVS tube end and the voltage drop of the surge decoupling power resistor exceeds the minimum action voltage of the piezoresistor, the piezoresistor acts, so that high-energy transient interference flows through the piezoresistor, and surge protection is realized. According to the utility model, the surge protection and isolation protection functions of the input end of the power supply can be effectively realized, and the safety and stability of the use of the power supply are ensured.

The embodiment of the invention provides a power driving circuit, and relates to the technical field of vehicles. The device is suitable for the technical field of various new energy vehicles such as electric vehicles, hybrid power vehicles and fuel cell vehicles. The circuit comprises a power supply, a sampling resistor, an MOS tube, a current monitoring unit, a comparator, a triode and a micro-control unit. The power supply is connected with the MOS tube through the sampling resistor, and the MOS tube is used for being connected with a power load; the sampling resistor is connected with a first signal input end of the micro-control unit through the current monitoring unit, and a second signal input end of the micro-control unit is connected with an output end of the MOS tube; the output end of the current monitoring unit is connected with the input end of the comparator, the output end of the comparator is connected with the input end of the triode, and the output end of the triode is connected with the MOS tube. The method provided by the invention effectively solves the problems that the cost of power driving power is relatively high and the protection requirement of the domain control device cannot be met in the prior art.

The invention provides a unidirectional ultra-low voltage electrostatic protection device which comprises a TVS main device and a low voltage trigger unit, the TVS main device comprises an N-type heavily doped substrate and a P-type epitaxial layer, and a first P + heavily doped active region, an N + heavily doped active region and a second P + heavily doped active region are arranged in the P-type epitaxial layer. The first P + heavily-doped active region, the N + heavily-doped active region and the second P + heavily-doped active region are matched with one another to form an NPN-type triode, the lower surface of the N-type heavily-doped substrate can be connected with a first I / O port, the N + heavily-doped active region and the second P + heavily-doped active region can be connected with a second I / O port, and the low-voltage trigger unit is arranged between the first I / O port and the first P + heavily-doped active region. The low-voltage trigger unit can rapidly conduct a PN junction formed by the first P + heavily-doped active region and the N + heavily-doped active region in a positive bias mode. The electrostatic protection device has the beneficial effect that the turn-on voltage of the electrostatic protection device can be reduced.

The utility model relates to audio equipment and a control circuit thereof for automatically cutting off output when no signal exists, the control circuit for automatically cutting off output when no signal exists comprises a pre-stage control circuit and a switch unit connected in series between a power amplifier circuit and a loudspeaker; the pre-stage control circuit comprises a polar capacitor C20, a first operational amplifier, a first voltage stabilizing diode, a resistor R27, a diode D3, a triode Q4, a triode Q5, a resistor R31, a resistor R32, a resistor R34, a diode D6, a polar capacitor C21 and a second operational amplifier; the switch unit is configured to connect or disconnect the power amplifier circuit and the loudspeaker based on the received high and low level signals output by the second operational amplifier; when no signal exists, the connection between the power amplifier circuit and the loudspeaker is cut off, so that the loudspeaker is in a mute state, and noise is not generated when the audio equipment stops performance in a power-on state; and the cost is low, the design is simple, and the development period is shortened.

The invention provides a parasitic leakage compensation circuit for a high-voltage diode and a CAN transceiver, and the circuit comprises a first diode; the emitter of the triode is connected with the anode of the first diode, and the base of the triode is connected with the cathode of the first diode; the drain of the transistor is connected with the cathode of the first diode, and the grid of the transistor is connected with the anode of the power supply; one end of the current mirror is connected with the source electrode of the transistor, and the other end is grounded; one end of the first switch is connected with a first node between the source electrode of the transistor and the current mirror, and the other end of the first switch is connected with a second node; one end of the second switch is connected with the second node, and the other end of the second switch is connected with a NOT gate; one end of the capacitor is connected with the second node, and the other end is grounded. According to the invention, a parasitic device of the high-voltage diode can be charged by adopting a capacitor nonlinear discharge mode, so that the electric leakage phenomenon of a parasitic triode of the device is blocked, and the circuit is effectively protected.

The invention relates to the technical field of wireless communication, and provides a radio frequency power amplifier which comprises a power amplifying circuit, a first biasing circuit, a second biasing circuit and a feedback circuit. The first biasing circuit comprises a first resistor, a first voltage division circuit and a first triode, the first end of the first resistor is used for being connected to an external first power supply, and the second end of the first resistor is connected with the first end of the first voltage division circuit and the base electrode of the first triode; the second biasing circuit comprises a second resistor, a second voltage division circuit and a second triode; the first end of the second resistor is connected with the second end of the first resistor, the second end of the second resistor is connected with the second voltage division circuit and the second triode, and the second triode is connected with the feedback circuit and the power amplification circuit. According to the radio frequency power amplifier, power amplifier gain and linear performance fluctuation caused by temperature change can be reduced, and simplified circuit layout and smaller chip area occupation can be realized.

The invention provides an implementation method for measuring the ignition resistance of an industrial electronic detonator, which belongs to the technical field of resistance measurement, and comprises the following steps: the measurement of the ignition resistance of the industrial electronic detonator is realized based on a detection circuit, the detection circuit comprises an MCU microcontroller U1, a single-pole double-throw physical relay U2, a relay change-over switch triode Q1, a divider resistor R1 and a divider resistor R2 of the measurement circuit, and a dual-path integrated operational amplifier. The test state of the ignition resistor is switched based on a single-pole double-throw physical relay U2 and a relay change-over switch triode Q1; a millivolt-level weak signal is output to a measuring circuit based on the MCU microcontroller U1, and specific voltage values of a point A and a point B corresponding to the divider resistor R1 and the divider resistor R2 in different test states are controlled; the specific voltage values of the point A and the point B are amplified by the same multiple based on the integrated operational amplifier of the two paths, so that the current value flowing through the measuring circuit is calculated, the ignition resistance value is calculated, and the measuring precision is effectively guaranteed.

The invention relates to the technical field of battery charging protection circuits, and discloses a battery charging overcurrent checking circuit which comprises a triode PNP0, a substrate of a charging power tube PM0 is electrically connected with a base electrode of a PNP type triode PNP0, an emitting electrode of the triode PNP0 is connected with charging input voltage VIN, a collector electrode of the triode PNP0 is connected with one end of a resistor R1, and the other end of the resistor R1 is grounded; the negative input end of the comparator COMP is connected to a connection node of the triode PNP0 and the resistor R1 to obtain voltage VC, the output end of the reference voltage generation module is electrically connected with the positive input end of the comparator COMP to obtain reference voltage Vref, the output end of the comparator COMP outputs an overcurrent detection signal, substrate current of the charging power tube PM0 is adopted as a detection signal source, and the voltage Vref is detected through the detection signal source. A detection circuit is built by matching a PNP type triode PNP0 and a resistor R1, and an additional reference PMOS tube and a continuously working reference current source are omitted, so that the chip layout area is saved, and miniaturization of a charging chip is facilitated.

The utility model relates to the technical field of relay control, and provides a relay drive control circuit, which comprises an input control module, a voltage division control module, a comparator, a first capacitor, a first triode and a second triode, the control end of the input control module is connected with the first input end of the comparator and the base electrode of the second triode. A second input end of the comparator is connected with a rated voltage signal end through the voltage division control module, and an output end of the comparator is connected with a base electrode of the first triode; one end of the first capacitor is connected with the first input end of the comparator and the other end is grounded; an emitter of the first triode is connected with a rated voltage signal end, and a collector of the first triode is connected with a first contact of a relay to be driven and a holding voltage signal end; the emitter of the second triode is connected with the second contact of the relay to be driven, and the collector of the second triode is grounded. According to the circuit, the EMC problem is avoided, a plurality of electrolytic capacitors do not need to be connected in parallel, and the circuit cost is relatively low.

The utility model discloses a self-protection circuit suitable for an energy storage pre-charging loop. The cathode of an energy storage power supply is connected with a cathode relay K1, and the anode of the energy storage power supply is sequentially connected with a main loop fuse F1 and an anode relay K2; the pre-charging resettable fuse F2 is sequentially connected with a pre-charging relay K3, a pre-charging resistor R1 and an anti-reverse diode D2 in series, and a series circuit is connected to the two ends of the K2 in parallel; two ends of a control coil of the K3 are respectively connected with positive and negative electrodes of a diode D1; one end of the resistor R2 is connected with a control signal P1, and the other end of the resistor R2 is connected with the resistor R3 and the base electrode of the triode Q1; the collector electrode of the triode Q1 is connected with one end of a control coil of the pre-charging relay K3 and the positive electrode of the diode D1, and the emitter electrode is grounded; the negative electrode of the diode D1 and the other end of the control coil of the relay K3 are connected with a power supply VCC through S1. According to the utility model, the self-protection of the pre-charging circuit can be realized when the pre-charging circuit performs the pre-charging action and the external load is short-circuited.

The utility model provides a power supply overvoltage protection circuit. Comprising a control network module and a turn-off module, the control network module comprises a voltage stabilizing diode, a first resistor, a second resistor and a PNP triode, one end of the first resistor is connected to a power input end, and the other end of the first resistor is connected with the second resistor and the voltage stabilizing diode; and the turn-off module comprises a field effect transistor, the first resistor and one end of an E electrode of the PNP triode are jointly connected to a source electrode of the field effect transistor, one end of a C electrode of the PNP triode is connected to a grid electrode of the field effect transistor, and the turn-off module is used for performing turn-off control on the field effect transistor to realize an overvoltage protection function. The power supply overvoltage protection circuit provided by the utility model has the advantages of simple structure, quick response, simplicity, high efficiency and low cost.

The present invention belongs to the technical field of circuit design, and discloses a low-leakage current gating switch circuit for high-precision measurement of multiple resistors, including: diodes D1 to D7, triode Q3, MOS transistors Q1, Q4, Q5, Q6, operational amplifiers U1, U2; the standard current input terminal is grounded through diode D1, MOS transistor Q1, the source electrode of MOS transistor Q1, diode D3 and the resistor under test R4, and diode D3 is also connected to the ADC sampling terminal through MOS transistors Q5, Q4, Q6, the positive terminal of operational amplifier U2 is connected to the standard current input terminal, the negative terminal is connected to the output terminal, and the negative terminal is also connected to MOS transistor Q1 through diode D7 and diode D2; the positive terminal of operational amplifier U1 is connected to the ADC sampling terminal, the negative terminal is connected to the output terminal, the output terminal is connected to diode D2 through diode D6, and the output terminal of operational amplifier U1 is also connected to the source electrode of MOS transistor Q6 through diode D4. The present invention can reduce the overall leakage current of the circuit to the picoampere level, greatly improving the measurement accuracy.

The utility model provides an MOS tube voltage switch protection circuit. The MOS tube voltage switch protection circuit comprises a voltage division circuit, a voltage-regulator tube U1, a comparator U2, a triode Q2 and an MOS tube Q3. A voltage division circuit is used for dividing a high-voltage electric signal of the input end of a high-voltage power supply to be low enough and then connecting the high-voltage electric signal to the input end of a voltage-regulator tube U1, and a low enough voltage VCC1 is formed at the output end of the voltage-regulator tube; the voltage VCC1 and the low voltage VCC are connected with the input end of the comparator U2 at the same time, and the output end of the comparator U2 is connected with the grid electrode of the MOS tube Q3. The second voltage division circuit divides the high voltage to the ground into about 2.7 VDC to be connected with the drain electrode of the MOS tube Q3, and the source electrode of the MOS tube Q3 is grounded; a base electrode of the triode Q2 is connected with a drain electrode of the MOS tube Q3, a collector electrode is connected with high voltage through a collector electrode resistor R2, and an emitter electrode is grounded; the collector electrode of the triode Q2 forms a protection signal and is connected with the grid electrode of the MOS tube Q1. When the protection circuit is applied to a high-voltage part of an electronic product, electronic components can be effectively protected, and the reliability of the product is improved.

The utility model relates to a phase change thermo-acoustic engine experimental device which comprises a thermo-acoustic conversion system and an acoustic-electric conversion system. The thermo-acoustic conversion system comprises a sound production module and a Helmholtz resonant cavity, a ceramic plate stack soaked with water exists in the sound production module, and the stable temperature difference needed for generating the thermo-acoustic effect at the two ends of the ceramic plate stack is reduced. Sound waves generated by the thermoacoustic effect form standing waves in the Helmholtz resonant cavity, and the sound intensity is amplified; the acoustic-electric conversion system comprises piezoelectric ceramics and a triode common-emitter amplification circuit, the piezoelectric ceramics are arranged at the tail end of the resonant cavity and convert acoustic energy into electric energy, and the electric energy is amplified by the triode common-emitter amplification circuit and then drives a nixie tube to display. The experimental device integrates thermodynamics, fluid mechanics, acoustics, material science and electronic technology, has the characteristics of simple structure, low cost, rich physical process and strong exploration, is suitable for experimental teaching, particularly suitable for new engineering teaching requirements, and is beneficial to improving the multidisciplinary cross practice ability of students.

The invention provides a switch self-locking circuit, which comprises a power supply, a power-on signal receiving module, a first divider resistor module, a silicon controlled rectifier, a triode, a driving optocoupler module and an output module, and is characterized in that the first end of the power-on signal receiving module is connected with the power supply, and the second end of the power-on signal receiving module is electrically connected with the control end of the silicon controlled rectifier; the anode of the silicon controlled rectifier is electrically connected with the output end of the first divider resistor module, and the cathode of the starting signal receiving module is grounded; a first input end of the first divider resistor module is connected with a power supply, and a second input end of the first divider resistor module is electrically connected with a base electrode of the triode; the emitter of the triode is connected with a power supply; the collector of the triode is electrically connected with the input end of the driving optocoupler module; the first output end of the driving optocoupler module is grounded, the second output end of the driving optocoupler module is electrically connected with the first input end of the output module, and the third output end of the driving optocoupler module is electrically connected with the second input end of the output module. And the reliability of the switch self-locking circuit is improved.

The invention provides a band-gap reference circuit, a current compensation method and a reference power supply. The band-gap reference circuit comprises a first triode module, a second triode module, a first resistor module, a second resistor module, a first compensation branch and a second compensation branch, the first compensation branch generates first compensation current, and the first compensation current compensates first current flowing into a third end of the first triode module from a first end of the first triode module. The first compensation current is equal to the first current. The second compensation branch generates second compensation current, the second compensation current compensates second current flowing into the third end of the second triode module from the first end of the second triode module, and the second compensation current is equal to the second current. The problems that the precision of the reference voltage output by the band-gap reference circuit is reduced, the temperature drift is increased, and the stability and reliability of the reference voltage are seriously influenced due to the fact that an existing band-gap reference circuit cannot guarantee accurate matching of collector currents of two branches of BJTs are solved.

The utility model discloses a kind of drive circuits, belong to electric bicycle instrument technical field, specifically related to a kind of electric bicycle instrument drive circuit, comprising: conversion module, output filter and high voltage surge suppression module;Output filter and high voltage surge suppression module are connected with conversion module;Conversion module includes: MOS tube Q6, MOS tube Q9, resistance R20, resistance R19, resistance R18, triode Q5 and triode Q10;Output filter includes: inductance L2, electrolytic capacitor C15, electrolytic capacitor C14, capacitor C13;High voltage surge suppression module includes: transient voltage suppression diode D5;The utility model uses wide input voltage range, high-efficiency switching power supply, replaces traditional linear voltage stabilizer, and efficiency is higher, and heat is smaller, and tolerance to input voltage fluctuation is better, while increasing greater capacity input electrolytic capacitor, effectively absorb transient surge and fill transient voltage drop, in addition, TVS diode is used to suppress high voltage surge, and self-recovery fuse is used to prevent overcurrent.

The invention discloses an output isolation MOS tube anti-backflow control circuit, and belongs to the technical field of secondary power supplies of spacecrafts. The circuit comprises a power control power supply U1, resistors R1 to R3, diodes D1 to D2, triodes Q1 to Q2, a capacitor C0 and an MOS tube M1, the MOS tube M1 is cut off by sampling voltages at two ends of the MOS tube M1 when the voltage of a source S of the MOS tube is lower than the voltage of a drain D, so that the secondary power supply output without faults is prevented from being reversely injected into the faulted secondary power supply, and the normal work of the output voltage after the secondary power supplies are connected in parallel is protected.

The invention relates to a non-polar wide-voltage-range sampling circuit, which comprises a polarity switching circuit (NMOS (N-channel Metal Oxide Semiconductor) transistors Q1 and Q2 are respectively connected with detection voltages T1 and T2, and source electrodes are in common ground); the base electrode of a PNP triode Q3 is connected with the output end of the voltage comparator U1, the collector electrode of the PNP triode Q3 is connected with the grid electrode of Q1 through R8, and the output end of U1 is connected with the grid electrode of Q2 through R10); the voltage comparison circuit (U1, R1-R4 voltage dividers, T1 and T2 are connected with the in-phase end and the anti-phase end of U1 after voltage division); and an output switching circuit. When T1 is positive and T2 is negative, Q2 is conducted, otherwise Q1 is conducted; the U1 outputs high and low levels to control the states of the Q3, the Q1 and the Q2; the U2 of the output switching circuit switches CH1 or CH0 to be connected with COM according to SEL. Resistance values of R1 and R3 and R2 and R4 are equal, and the resistor of the voltage divider can be adjusted to adapt to different voltages. According to the invention, non-polar wide voltage sampling is realized, and sampling accuracy and circuit stability are ensured.

A semiconductor plug arrangement system and arrangement method, the system comprises: a vibrating disc, the inner wall is provided with a spiral material plate, the end of the spiral material plate is connected with a main material groove extending to the outside of the vibrating disc. A spiral groove is formed on the inner wall of the vibrating disc corresponding to the connecting part of the spiral material plate; a notch is formed on one side of the middle section of the main material groove, the width of the notch is greater than or equal to half of the width of the bottom plate of the main material groove, the notch is connected with a branch material groove, the branch material groove is communicated with the main material groove, a stop rod is arranged on the inner wall of the side plate opposite to the notch of the main material groove in parallel, the stop rod has a gap between the bottom plates of the main material groove, a notch is formed on the middle section of the stop rod, the width of the notch is greater than the width of the pin; the end of the branch material groove and the end of the main material groove are respectively connected to two ends of an arc track, and a material taking point is arranged on the middle section of the arc track. The scheme can multiply the number of triodes arranged and output by the vibrating disc, and effectively reduces the influence on the plug-in equipment lifting efficiency.

The present application provides a voltage comparator and a current limit control circuit. Among them, the non-inverting input terminal and the inverting input terminal of the voltage comparator are respectively connected to a first triode and a second triode. A first current mirror provides a constant current power supply and is connected to the bases of the first triode and the second triode. The collector of the first triode is connected to a second current mirror. A third current mirror is a constant current power supply and is respectively connected to the emitters of the first triode and the second triode. The output terminal of the second current mirror and the output terminal of the third current mirror are connected to an inverter. The output terminal of the inverter is the output terminal of the voltage comparator. When the voltage of the non-inverting input terminal is greater than the voltage of the inverting input terminal, the current flowing through the first diode and the current at the output terminal of the second current mirror are greater than the current at the output terminal of the third current mirror, such that a high level is output from the output terminal of the second current mirror to the inverter. After the inverting action of the inverter, a low level is output from the output terminal of the voltage comparator.

The present invention proposes a linear power amplifier static operating point conditioning and self-recovery protection circuit, which belongs to the technical field of amplifiers and amplification control. The circuit includes a static operating point feedback conditioning circuit and an output overcurrent protection circuit. The static operating point feedback conditioning circuit includes an operational amplifier U11, a capacitor C11, a resistor R11, a resistor R13, and a resistor R19. The output overcurrent protection circuit includes an operational amplifier U11, a transistor T12, a transistor T13, a resistor R17, and a resistor R18. The two parts share the same operational amplifier. The circuit is simple and efficient, ensuring a stable static operating point of the linear power tube and output overcurrent protection and protection self-recovery.