44results about How to "Fast shutdown" patented technology

The invention discloses a SiC MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) driving circuit and a control method thereof, the SiC MOSFET driving circuit comprises an active current source driving circuit, a SiC MOSFET, a load current detection circuit, a drain-source inter-electrode voltage overshoot detection circuit, an analog-to-digital conversion module and an FPGA (Field Programmable Gate Array) module, and a self-adaptive adjustment algorithm is built in the FPGA module. The load current detection circuit and the drain-source inter-electrode voltage overshoot detection circuit have low requirements for real-time performance, use of high-speed simulation devices is avoided, hardware design cost is reduced, a self-adaptive adjustment algorithm can adjust SiC MOSFET gate drive parameters in real time according to output of the load current detection circuit and the drain-source inter-electrode voltage overshoot detection circuit, and the self-adaptive adjustment algorithm can adjust the gate drive parameters of the SiC MOSFET in real time according to the output of the drain-source inter-electrode voltage overshoot detection circuit. Therefore, overshoot and switching loss are self-adaptively balanced, and safe operation of the SiC MOSFET is ensured. The technical problems that a SiC MOSFET driving circuit driven by an active grid is high in hardware cost and is difficult to balance voltage and current overshoot and switching loss are solved.

The invention provides an EAS test device and test method applied to a silicon carbide MOS device, and the device comprises a drive circuit which comprises a gate drive module, an isolation power module, and a switch module. The test circuit comprises a silicon carbide MOS device to be tested; the gate driving module and the isolation power supply module are connected with the switch module, and the switch module is connected with a silicon carbide MOS device to be tested; the gate driving module controls the switch module to open the positive voltage provided by the isolation power supply module and is connected to the gate pole of the silicon carbide MOS device to be tested; or the gate driving module controls the switch module to turn on the negative voltage provided by the isolation power supply module, and is connected to the gate pole and the Kelvin pin of the silicon carbide MOS device to be tested. According to the invention, through the isolation power supply module, the turn-on voltage required by the silicon carbide MOS device to be tested in the EAS test can be realized at a low cost, the shutdown loss caused by the suspension of the Kelvin pin is reduced, the discharge of gate charge is accelerated, and the purpose of rapid turn-off is achieved.

The invention provides a high-voltage modulation circuit supporting continuous and high-repetition-frequency pulse work, relates to the technical field of microwave and millimeter wave phased array radars, and solves the defect problem that continuous work and high-repetition-frequency pulse work cannot be supported at the same time under high-voltage input in the prior art. In the high-voltage modulation circuit, an input signal driving circuit is used for controlling an integrated gate driver through a first complementary driving signal; the grid voltage control power supply circuit is used for controlling the power supply of the input signal driving circuit according to the grid voltage of the last-stage power amplifier chip; the integrated gate driver is used for respectively controlling on and off of the modulation switch tube and the discharge tube according to the first complementary driving signal; the dead zone adjusting circuit is used for adjusting and modulating the switching speed of the switching tube and the discharge tube; the isolation power supply circuit is used for supplying power to the integrated gate driver and maintaining conduction of the modulation switch tube under high-voltage input; the method has the advantages of being high in design adjustment freedom degree, safe in circuit logic, adaptive to various working scenes and multi-platform multi-purpose application.

The invention discloses a master station type cross-station one-key sequential control method and system based on a centralized control system, and relates to the technical field of power system automation and control, and the method comprises the steps: collecting power grid operation data and equipment state information in real time through various sensors of the centralized control system, carrying out the multi-modal data fusion, and carrying out the multi-modal data fusion through the fused data, the operation process is monitored in real time, and possible errors or abnormal conditions are detected; analyzing the collected data, constructing a prediction model, and intelligently generating an optimal operation strategy and an execution sequence according to a real-time power grid state and an operation history; operation and maintenance personnel start sequential control operation through one key, and the system automatically executes corresponding operation steps according to the operation order. Through the one-key starting function, operation and maintenance personnel can quickly select and execute the pre-generated operation order, and a tedious manual process in traditional operation is avoided. The control instruction automatically generated by the system is analyzed according to the operation order, so that the execution of the operation steps is quicker and more accurate.

The invention relates to a gas turbine unit electric energy supply system coupled with electricity storage and sCO2 circulation and a dispatching method, and belongs to the technical field of electric power. The system comprises a non-dispatchable electric energy system and a dispatchable electric energy system, the dispatchable electric energy system comprises a gas turbine power generation system, an sCO2 power cycle power generation system, an electricity storage device and a water electrolysis hydrogen production device, and the input end of the electricity storage device and the input end of the water electrolysis hydrogen production device are connected with the non-dispatchable electric energy system through a controller A; the output end of the electricity storage device, the gas turbine power generation system and the sCO2 power cycle power generation system are connected with a power grid through a controller B. The output end of the water electrolysis hydrogen production device is connected with a hydrogen storage tank, the gas turbine power generation system, the sCO2 power cycle power generation system and the undispatchable electric energy system are connected with the power grid. According to the invention, the impact of the randomness and volatility of new energy power generation such as wind and light on the power grid is solved, the peak regulation capability of the power system is improved, and the power supply quality and operation safety of the power grid are guaranteed.

The utility model provides an ion implanter and a semiconductor processing system, and relates to the technical field of ion implanters. The ion implanter comprises a cavity, an exhaust pipeline, a one-way valve, an isolating valve and a tail gas treatment device, the cavity is communicated with the tail gas treatment device through the exhaust pipeline, and the one-way valve and the isolating valve are installed on the exhaust pipeline; wherein when the ion implanter is in an exhaust state, the isolation valve is conducted; when the suction force of the tail gas treatment device is greater than or equal to a threshold value, the one-way valve is switched on; when the suction force of the tail gas treatment device is smaller than a threshold value, the one-way valve is switched off; and when the ion implanter is in a non-exhaust state, the isolating valve is switched off. The ion implanter and the semiconductor processing system provided by the utility model have the advantage of being capable of effectively preventing waste gas from flowing back into the cavity.

The utility model discloses a cyclone type chlorine dioxide generator, including generator body, the bottom of generator body is provided with raw material adding opening, and raw material adding opening out installs liquid inlet structure, the liquid inlet structure includes for inner tube and the outer tube of setting in the outer portion of inner tube, the upper end of inner tube is closed, and the lateral wall on inner tube is equipped with liquid inlet hole, and the lower end of inner tube is used for adding hydrochloric acid, the lower end of outer tube is closed, and the lateral wall on outer tube is vertically installed with liquid adding pipe, and liquid adding pipe is used for adding sodium chlorite, and the upper end of outer tube is linked with raw material adding opening. The utility model can make the reaction raw material in the joining place of reactor and the reaction zone subarea realize raw material's quick double full mixing, improve the reaction rate, make the reaction more fully, can provide sufficient diffusion space for the reaction liquid of heated expansion simultaneously, control the residence time of reaction liquid in generator, reduce the production of byproduct such as sodium chlorate, improve the conversion rate of sodium chlorite, guarantee the high yield of ClO2.

The utility model discloses a logic drive circuit for synchronous rectification of a bidirectional power supply and the bidirectional power supply. The circuit comprises a synchronous rectification chip, a control circuit and a control signal port. The circuit is connected to a control circuit through a control signal port, so that the power supply of the synchronous rectification chip is adjusted, and the working state of the synchronous rectification chip is controlled. The circuit is simple in principle and process, control driving of the synchronous rectification chip of the bidirectional power supply is realized by using fewer devices and a simpler control thought, and the effect of preventing false triggering of the synchronous rectification chip during reverse power supply of the bidirectional power supply is achieved; the purpose of preventing main power driving disorder during reverse power supply of the bidirectional power supply with synchronous rectification is achieved, and the circuit can be widely applied to development of battery bidirectional charging and discharging switching power supply circuit products.

The utility model discloses a dynamic matching module, a chip and a system, communication abnormity is prevented by introducing a waveform optimization unit between two coding output ends of a coding module, and the waveform optimization unit is connected between the two coding output ends of the coding module by conducting an MOS (Metal Oxide Semiconductor) tube. The voltage difference between the two coding output ends can be rapidly pulled to 0V, the communication quality is further improved, and the effect is better.

This application discloses a high-efficiency five-axis machining center, relating to the field of CNC machine tools. It includes a base and a worktable, with two support seats mounted on the base. A transverse slide is slidably connected to each of the two support seats, and a positioning seat is provided on each support seat. An inclined surface is formed on the side of the positioning seat near the transverse slide, and a transverse stator is mounted on the inclined surface. Transverse movers are mounted on both sides of the transverse slide. A longitudinal slide is slidably connected to the transverse slide, with a row of longitudinal stators mounted on the transverse slide and longitudinal movers mounted on the longitudinal slide. A vertical drive seat is slidably connected to the longitudinal slide, and a vertical drive cavity is formed on the vertical drive cavity. A vertical drive component is installed within the vertical drive cavity, and one end of the vertical drive component is rotatably connected to a first drive screw. This application aims to disperse the upward shearing force generated during cutting, improve the stability of the transverse slide movement, and enhance product machining accuracy and processing effect.

The invention belongs to the technical field of metal powder processing, and discloses a smelting device, a smelting system and a metal powder forming system. A flow guide pipe is arranged at the bottom of the crucible, a flow guide channel communicated with the interior of the crucible is arranged in the flow guide pipe, a nozzle is arranged at an outlet of the flow guide channel, a flow channel is arranged in the nozzle, and the flow channel comprises a transition section and a drainage section which are sequentially arranged; a heating unit; the switch control unit comprises a stopper rod which penetrates through the crucible and is inserted into the flow guide channel, a switch valve assembly is arranged at the end of the stopper rod, and the switch valve assembly comprises a plug valve matched with the transition section and a needle valve matched with the drainage section. According to the centrifugal atomization device, the flowing stability of copper liquid flow, the consistency of the liquid flow direction and the specification size, the uniformity of the liquid flow, the constancy of the liquid flow temperature and the consistency of the temperature can be well guaranteed, and therefore the quality of metal powder prepared through centrifugal atomization is guaranteed.

This invention discloses an automatic switching system, method, and drive circuit for an uninterruptible power supply (UPS) in the field of power electronics. It includes a power module for providing electrical energy to the system; a relay switch unit for controlling the switching of mains power input; an accelerated turn-off unit for accelerating the turn-off of the relay switch unit; a circuit switching unit for switching a high-current drive circuit to a low-current drive circuit after a predetermined delay; and a control module for outputting a high-level signal to control the circuit switching unit to switch the high-current drive circuit to accelerate the closing of the relay switch unit, and outputting a low-level signal to control the accelerated turn-off unit to accelerate the turn-off of the relay switch unit. This invention employs a delayed switching drive design and an accelerated turn-off unit, which significantly simplifies the power supply hardware design, reduces the power requirements of the auxiliary power module, and significantly shortens the relay turn-off time, ensuring the stability and reliability of the UPS during the switching process.

The utility model discloses a fast turn-off electronic safety circuit in the field of electronic safety, which comprises a current sampling circuit, an electronic turn-off circuit, a drive control circuit and a current turn-off control circuit, the output end of the current sampling circuit is connected with the input end of the driving control circuit and the input end of the current turn-off control circuit, and the output end of the driving control circuit and the output end of the current turn-off control circuit are connected with the driving end of the electronic turn-off circuit. And the output end of the electronic disconnection circuit is connected with the output voltage. According to the utility model, the problem that the conventional slow-melting safety device cannot be disconnected within the fusing time and is easy to cause the combustion of the post-stage continuous large current is solved, the post-stage circuit can be quickly cut off, the effect of quickly cutting off the safety is realized, the combustion accident caused by the post-stage continuous large current is further avoided, and the safety accident is prevented.

The invention discloses a solenoid turn-off circuit and method, and belongs to the technical field of motion control. The first dissipation module is connected with the solenoid unit, and the first dissipation module is configured to communicate with the solenoid unit so as to perform primary dissipation on the current released by the solenoid unit; the dissipation bypass module is connected between the first dissipation module and the solenoid unit, and the dissipation bypass module is configured to perform secondary dissipation on the current released by the solenoid unit when the first dissipation module is disconnected from the spiral pipe unit; wherein the dissipation duration of the second-stage dissipation is smaller than that of the first-stage dissipation. According to the circuit provided by the invention, the current in the solenoid unit can be quickly dissipated through the dissipation bypass module, the time for turning off the solenoid is short, and the response speed and the real-time controllability of an equipment system are improved.

The invention discloses a power grid uninterruptible power supply automatic switching system and method and a driving circuit, and belongs to the technical field of power electronics, and the system comprises a power supply module which is used for providing electric energy for the system; the relay switch unit is used for controlling the on-off of commercial power input; the acceleration turn-off unit is used for accelerating turn-off of the relay switch unit; the circuit switching unit is used for switching the large-current driving loop into a small-current driving loop after a preset time is delayed; and the control module is used for outputting a high-level signal to control the circuit switching unit to switch the large-current driving loop to accelerate the closing of the relay switch unit, and outputting a low-level signal to control the acceleration turn-off unit to accelerate the turn-off of the relay switch unit. The delay switching driving design and the acceleration turn-off unit are adopted, the power supply hardware design can be greatly simplified, the power requirement of the auxiliary power supply module is reduced, meanwhile, the turn-off time of the relay is remarkably shortened, and the stability and reliability of the power grid uninterruptible power supply in the switching process are ensured.

A multifunctional purge valve special for a nuclear power station diesel engine comprises a valve body with the cross section of a T-shaped structure, a valve element body moving up and down is installed in the valve body in a matched mode, three channels are formed in the valve body, and openings of the channels include an inlet A, an outlet B and a bypass opening C; the top faces of the valve element body and the valve body are provided with valve decks in a matched mode at the same time, and air inlet channels are formed in the middles of the valve decks. A groove is formed in the middle of the upper portion of the valve body, a sliding rail is installed on the inner wall face of the groove, a protruding structure matched with the sliding rail is arranged on the upper portion of the valve element body, a vent hole is further formed in the protruding structure, the vent hole is communicated with the inner space of the groove, and meanwhile the vent hole is communicated with the air inlet channel. The air channel is communicated with the vent hole; the bottom of the valve element body is connected with the valve body through the reset spring, the efficient blowing function can be effectively achieved, meanwhile, the good sealing performance and operation convenience are achieved, and use is flexible and convenient.

The invention discloses an input stage circuit, a single-end-to-differential circuit and a chip, the input stage circuit comprises a first input tube, a second input tube, a first bias unit, a second bias unit, a first control unit and a second control unit, the first input tube receives a first input signal, the second input tube receives a second input signal, and the first bias unit is connected with the second bias unit; the first bias unit provides first bias current for the first input tube, the second bias unit provides second bias current for the second input tube, the first control unit adjusts the descent speed of the first bias current, and the second control unit adjusts the descent speed of the second bias current. According to the input stage circuit, the single-ended to differential circuit and the chip, corresponding control voltages are provided through the first control unit and the second control unit, so that the bias unit is quickly turned off, the reduction of the load current is further accelerated, and the aim of improving the response speed of the input stage circuit and the response speed of a next stage circuit applying the input stage circuit is achieved.

The present application is applicable to the field of power electronics technology, and provides a switch control circuit and a power supply device, including a first switch tube, a second switch tube, a first pulse transformer, a second pulse transformer, a first drive circuit and a second drive circuit. In the above-mentioned switch control circuit, two pulse transformers and two drive circuits are used to drive the two switch tubes respectively, which can improve the flexibility and safety of the switch tube control. When the switch control circuit is working in a non-power conversion state, the drive circuit presets a negative voltage to the control end of the switch tube to ensure that the switch tube maintains a reliable shutdown state; and when the switch control circuit is working in a power conversion state, the drive circuit applies a set pulse signal to the control end of the switch tube to ensure that the drive voltage of the switch tube is negative during the shutdown process, prompting the switch tube to shut down quickly, and effectively preventing the switch tube from being mis-turned on due to the Miller effect.

The invention discloses an acousto-optic modulator driving circuit, which comprises a local oscillation signal generator module, an analog driving modulation amplification module, a digital driving modulation amplification module and a power supply modulation module, and is characterized in that the local oscillation signal generator module is formed by connecting a crystal oscillation circuit, a low-pass filter circuit and a power divider; the analog driving modulation amplification module is formed by connecting a variable gain amplification circuit, a pre-amplification circuit, a power amplification circuit, a matching and low-pass filter circuit and a radio frequency output port; the digital driving modulation amplification module is formed by connecting a keying modulation circuit, a pre-amplification circuit, a power amplification circuit, a matching and low-pass filtering circuit and a radio frequency output port. The local oscillation signal generator module generates high-frequency sinusoidal signals through the crystal oscillation circuit and the low-pass filter circuit, local oscillation signals are provided for the analog driving modulation amplification module and the digital driving modulation amplification module at the same time through the power divider, the average power consumption is reduced, and the area and cost of a circuit board are saved.

The present invention provides a fast on-off current source circuit, which relates to the field of integrated circuit design. The current source circuit includes a current mirror K1, a switch module and an amplifier X1; the current module includes a switch S1 and a switch S2, and the switch S1 and the switch S2 are set in anti-phase. In the present invention, the switch S1 and the switch S2 are alternately opened, when the current source is disconnected, the switch S1 is disconnected, the switch S2 is closed, and the amplifier X1 transmits the output voltage to the output point of the current mirror K1, and maintains the working state of the current source circuit the same as when it is turned on; when the current source is closed, the switch S1 is closed, and the switch S2 is disconnected. Since the current source circuit always maintains the same working state during the process of the switches S1 and S2 being alternately turned on and off, it can quickly achieve fast switching and stable high-precision output.

The invention discloses a control method, a control device and an LLC resonant converter, and the control method comprises the steps: obtaining a feedback signal representing the size of an output electric parameter of the LLC resonant converter, comparing the feedback signal with a reference electric parameter, and taking a comparison result as a charge quantity given value; an electric signal of the magnitude of the electric charge accumulated by the resonance circuit is obtained cycle by cycle, the electric signal is processed to serve as an electric charge sampling value, and the electric charge accumulated by the resonance circuit is the electric charge accumulated by the resonance circuit within the pulse width overlapping time of the driving signals of the first bridge arm and the second bridge arm; and comparing the electric charge quantity sampling value in the current period with the electric charge quantity given value period by period to generate a control signal, and controlling the on and off of the two switching tubes in the first bridge arm according to the control signal. According to the invention, the problem of poor dynamic response of the phase-shift LLC resonant converter can be improved.

The invention discloses a broken wire trigger detection device and method. The broken wire trigger detection device comprises a pay-off system, an internal detection unit, a signal receiving system, a control system and an execution mechanism. The pay-off system comprises a pay-off rack, at least one wire breaking device is installed on the pay-off rack, and each wire breaking device comprises a rotary induction pressing plate and a photoelectric sensing assembly. The internal detection unit is a tubular eddy current detection unit and is composed of a non-magnetic metal tube shell and an internal eddy current sensor array; the signal receiving system is used for receiving signals of the photoelectric sensing assembly and the eddy current sensor array and transmitting the signals to the control system; the control system is in signal connection with the execution mechanism. Precise judgment, quantitative evaluation and precise positioning of the broken wires are achieved, stopping can be triggered when the broken wires occur, defective products are reduced from the source, the production cost is reduced, meanwhile, the production automation level and the equipment mobility are improved, and data support is provided for quality tracing and process improvement.

The invention discloses an electric glue gun and a control method thereof. The electric glue gun comprises a push-out mechanism used for installing a glue barrel and extruding glue; the motor is used for driving the push-out mechanism; the shell is used for supporting the push-out mechanism and is provided with a containing cavity for containing the motor and a handle for a user to hold; the operation switch is operated by a user to extrude the colloid according to the will of the user; the controller is used for controlling the motor to drive the push-out mechanism; wherein the controller is configured to control the motor to stop in a first position interval and to increase the speed after stepping out of the first position interval when the operation switch moves in the starting direction; when the operation switch moves in the turn-off direction, the motor is controlled to be decelerated before stepping into the second position interval and shut down in the second position interval; the second position point starting to stop in the second position interval is located on the rear side in the starting direction compared with the first position point ending to stop in the first position interval; the glue gun can be rapidly stopped, glue leakage is effectively avoided, and the user experience is improved.

The invention discloses a pixel circuit and a driving method thereof and a display panel, the pixel circuit comprises a time control module, a current control module, a potential holding module and a light emitting module, and the current control module is used for driving the light emitting module to emit light according to a first data voltage in a light emitting stage; the time control module is used for outputting a time control signal according to the second data voltage and the sweep frequency signal and controlling the potential of the control end of the current control module; the control end of the potential maintaining module is connected with the output end of the time control module, the output end of the potential maintaining module is connected with the control end of the current control module, and the potential maintaining module is used for maintaining the voltage of the control end of the current control module at the turn-off voltage according to the time control signal in the light emitting stage. According to the scheme, the potential of the control end of the current control module can be quickly and stably kept at the turn-off voltage when the light emitting module finishes emitting light, so that the stability of the potential of the control end of the current control module is kept, and the current control module is quickly turned off.

The utility model provides a component-level rapid turn-off device supporting a SunSpec protocol, which is not easily interfered by external signals and external equipment, is more reliable than wireless networking connection, can realize connection or rapid turn-off of a PV component, conforms to NEC safety specifications, and comprises a power supply circuit, a power supply circuit, a wireless communication circuit, a wireless communication circuit, a wireless communication circuit and a wireless communication circuit, the open-circuit voltage conversion module is used for converting open-circuit voltage of the PV assembly into direct-current voltage for power supply; the PLC receiving circuit is connected with the power supply circuit, is provided with a PLC receiving one-way interface with a SunSpec protocol, and is used for receiving a PLC signal; the time-base circuit is connected with the PLC receiving circuit and is used for pressurizing the charge pump; and the quick turn-off circuit is connected with the PLC receiving circuit and is used for realizing quick turn-off of the PV assembly according to the signal output by the PLC receiving circuit.

The utility model relates to a turn-off circuit and a rectification circuit. The circuit comprises a first switch piece arranged in a target circuit and a turn-off driving circuit of the first switch piece, the turn-off driving circuit comprises a level pull-down circuit, a bleeder circuit and a switch piece control circuit, the level pull-down circuit comprises a second power supply and a second switch piece, one end of the second switch piece is connected with the second power supply, and the other end of the second switch piece is connected with the bleeder circuit. The other end is connected with the bleeder circuit; the level pull-down circuit comprises a level pull-down point, and the level pull-down point is connected with the first switch piece; the switch piece control circuit is connected with the second switch piece and the turn-off driving signal source, and can output a first level signal to the second switch piece when the turn-off driving signal source outputs the first level signal, so that the second switch piece is turned on. By adopting the method, the first switch piece can be quickly turned off.

The embodiment of the invention provides a power conversion device, the power conversion device comprises a power switch tube and a driving circuit group corresponding to the power switch tube, and the driving circuit group comprises a first driving circuit and a second driving circuit; the first driving circuit is used for outputting a first driving voltage to the power switch tube and the second driving circuit based on the driving control signal; the second driving circuit comprises a first switching circuit and a second switching circuit which are connected in series, and the first switching circuit is used for being switched on or switched off based on the first driving circuit; the second switching circuit is used for being switched on or switched off based on the first mode control signal; and the second driving circuit outputs a second driving voltage to the power switch tube when the first switch circuit and the second switch circuit are both switched on. By implementing the embodiment of the invention, the working synchronization rate among the sub-driving circuits when the driving circuit switches different driving modes can be improved, so that the driving performance of the driving circuit is improved.

The embodiment of the present application provides a transformer isolation driving circuit, comprising: a transformer, comprising a primary coil, a first secondary coil and a second secondary coil; a first switch unit; a first discharge circuit, used for discharging a control end of the first switch unit, the first discharge circuit comprising a second switch unit; a third switch unit; a second discharge circuit, used for discharging a control end of the third switch unit, the second discharge circuit comprising a fourth switch unit; the conduction state of the first switch unit is opposite to the conduction state of the third switch unit, and the first switch unit and the third switch unit are used for outputting a driving signal. The transformer isolation driving circuit of the embodiment of the present application can ensure that the first switch unit and the third switch unit are quickly turned off, avoid the mis-conduction of the first switch unit and the third switch unit, and thus improve the stability of the driving circuit.

The utility model relates to a VHF band high -power power amplifier isolation circuit of quick shutdown signal belongs to power amplifier circuit technical field. Circuit includes signal input circuit, first drive amplifier circuit, second drive amplifier circuit, forestage amplifier circuit, last stage amplifier circuit and signal transceiver circuit that connect gradually in proper order, wherein, the output of forestage amplifier circuit and the input of last stage amplifier circuit have first signal isolation module in series, for isolating the output signal of forestage amplifier circuit, the output of last stage amplifier circuit and the input of signal transceiver circuit have second signal isolation module in series, for isolating the output signal of last stage amplifier circuit. The utility model discloses through two signal isolation modules and carries out isolation to the output signal of forestage amplifier circuit and last stage amplifier circuit respectively, improves the isolation of power amplifier circuit. Simultaneously, the transmitting signal and the receiving signal are completely isolated, have reduced the interference to the receiving signal, and the overall circuit structure is simple, has reduced the manufacturing cost of power amplifier circuit.

The invention provides a driving control circuit and a battery protection system, the driving control circuit comprises a turn-on driving module and a turn-off driving module, the turn-on driving module receives an original driving signal, and when the original driving signal is at a high level, a multi-tube parallel structure is controlled to be quickly turned on by amplifying a driving current; the turn-off driving module receives the original driving signal and controls the multi-tube parallel structure to be turned off quickly by amplifying the bleeder current when the original driving signal is at a low level. According to the driving control circuit and the battery protection system provided by the invention, the problems of low switching speed and even incapability of completely switching in the existing driving scheme are solved.