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45results about How to "Stable output waveform" patented technology
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Shifting register and thin film transistor liquid crystal displayer
ActiveCN103295511AImprove stabilityReduce signal crosstalkStatic indicating devicesDigital storageShift registerCapacitance
The invention provides a shifting register and a thin film transistor liquid crystal displayer. The shifting register comprises multiple levels of shifting register circuits, wherein each of shifting register circuit is composed of eight transistors and two capacitors, each shifting register circuit comprises a pull-up transistor, a first pull-down transistor, a second pull-down transistor, a switch transistor, a first capacitor, a reset transistor, a first auxiliary pull-down transistor, a second auxiliary pull-down transistor, a third auxiliary pull-down transistor and a second capacitor, wherein the pull-up transistor, the first pull-down transistor and the second pull-down transistor are arranged on a signal output module, the first auxiliary pull-down transistor and the second auxiliary pull-down transistor are arranged on an auxiliary pull-down module, and the third auxiliary pull-down transistor and the second capacitor are connected in parallel. The second capacitor serves as a buffer device and can filter out redundant glitch signals of output signals and reduce signal crosstalk. Meanwhile, due to the fact that the first pull-down transistor and the second pull-down transistor respectively work in each half pull-down period, drifting of the threshold voltage due to the over-large breadth-length ratio of each transistor is restrained, and stability of circuits can be ensured. The auxiliary pull-down module is arranged, so that the output waveform of a second node is made to be more stable.
Owner:SHANGHAI AVIC OPTOELECTRONICS
Portable active electroencephalogram monitor and control method thereof
InactiveCN101966080AImprove stabilityImprove reliabilityDiagnostic recording/measuringSensorsDiseaseClinical value
The invention relates to a portable active electroencephalogram monitor and a control method thereof, belonging to the field of medical apparatus and instruments. The electroencephalogram monitor comprises an electroencephalogram signal acquisition unit, an electroencephalogram signal analysis and storage unit and an upper computer, wherein an input and output end of the electroencephalogram signal acquisition unit is connected with a first input and output end of the electroencephalogram signal analysis and storage unit, and a first digital signal input and output end of the electroencephalogram signal analysis and storage unit is connected with an input and output end of the upper computer. The portable active electroencephalogram monitor has high stability and reliability and can be used for realizing the active long-term monitoring of accidental, transient, paroxysmal or characteristic electroencephalogram activities, and the normal life, study and work of patients can not be influenced. Because long-time electroencephalogram data can be continuously recorded, the electroencephalogram monitor has important clinic value in diagnosing epilepsia and cerebrovascular diseases and studying and analyzing sleep.
Owner:NORTHEASTERN UNIV
Low voltage data transmitting circuit and associated methods
InactiveUS20080218292A1Guaranteed uptimeTotal current dropElectric digital data processingCoupling devicesLow voltageEngineering
A low voltage data transmitting circuit (LVDTC) may be connected to a first transmission line that transmits a first voltage signal to a receiver and a second transmission line that transmits a second voltage signal to the receiver. The LVDTC includes a first resistor coupled to the first transmission line, a second resistor coupled to the second transmission line, and a control unit coupled to the first transmission line and the second transmission line, the control unit being configured to control voltage levels of the first and second voltage signals such that the voltage levels of the first and second voltage signals are higher than a ground voltage level of the receiver, wherein the first and second voltage signals may constitute a differential pair.
Owner:SAMSUNG ELECTRONICS CO LTD
Device and method for generating bipolar nanosecond high-voltage narrow pulses
The invention relates to a device and a method for generating high-voltage pulses, in particular to a device and a method for generating bipolar nanosecond high-voltage narrow pulses. The invention solves the problems of high inductance, serious oscillation, very high tailing voltage and unstable peak value of a working circuit of a bipolar high-voltage pulse power supply in the prior art. The technical scheme is that: the device comprises a direct current high-voltage circuit module, a synchronous trigger control circuit module, a positive pulse forming circuit module, a negative pulse forming circuit module, and a high-voltage pulse synthesizing circuit module. The device and the method are applied to design circuits of high-voltage narrow pulse power supplies in the fields of desulphurization and denitrification, volatile organic compounds (VOCs) removal, material surface modification and the like.
Owner:INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
An anti-interference low-voltage detection circuit
ActiveCN103604975AStable output waveformLittle impact from outside interferenceCurrent/voltage measurementCapacitanceLow voltage
The invention belongs to the field of integrated circuits, and relates to an anti-interference low-voltage detection circuit comprising a reference voltage circuit, a resistor voltage division circuit, a logical combination circuit, a shaping circuit, a recovery voltage setting circuit and a capacitance charge and discharge circuit. A resistor R1, a resistor R2, a resistor R3, and a resistor R4 of the resistor voltage division circuit are sequentially connected end to end. An initiating end R1 is connected to an input voltage VIN. The tail end R4 is grounded. The resistance value of R1 is equal to the resistance value of R4. An anode of a comparator in the logic combination circuit is connected with the reference voltage circuit. A voltage of a cathode is generated through voltage division by the resistor voltage division circuit. An output of an inverter 1 in the logical combination circuit is used for controlling charge and discharge of a capacitor. After the voltages generated by the two ends of the capacitor go through the shaping circuit, control signals are output, and at the same time, an output of a Schmidt shaping circuit of the shaping circuit is used for controlling the switching-on of an M1 and an M2 in order to set a recovery voltage. The anti-interference low-voltage detection circuit of the invention is advantageous in that: the anti-interference low-voltage detection circuit is strong in anti-interference capabilities, high in precision and accuracy, and easy to change.
Owner:SHANGHAI TAIXI ELECTRONICS TECH
UPS three-phase PWM voltage source inverter based on auto-disturbance rejection control and control method
InactiveCN108551271AAvoid the pitfalls of integral actionEasy to implementAc-dc conversionActive disturbance rejection controlThree-phase
The invention relates to the technology of UPS voltage source inverters, in particular to a UPS three-phase PWM voltage source inverter based on auto-disturbance rejection control. The inverter comprises an auto-disturbance rejection controller ADRC and a UPS three-phase PWM voltage source inverter. The UPS three-phase PWM voltage source inverter is a controlled object of the auto-disturbance rejection controller ADRC. The auto-disturbance rejection controller ADRC comprises a tracking differential controller TD, an expansion state observer ESO, and a non-linear state error feedback controllerNLSEF. The input end of the tracking differential controller TD is connected with an input signal and the output end is connected with the input end of the non-linear state error feedback controllerNLSEF and the output end of the expansion state observer ES. The input end of the expansion state observer ES is connected with the input end of the UPS three-phase PWM voltage source inverter. The output end of the non-linear state error feedback controller NLSEF is connected with the output end of the expansion state observer ESO. According to the invention, the inverter has high stability and quite strong disturbance rejection ability.
Owner:WUHAN UNIV OF TECH
Production process of high voltage transformer
ActiveCN102682986AImprove insulation performanceWith anti-electromagnetic interferenceCoils manufactureEpoxyElectromagnetic interference
The invention researches and develops a production process of a high voltage transformer, which includes the following steps of: (1) coiling primary windings, wherein the primary windings comprise a first primary winding and a second primary winding; (2) coiling secondary windings, wherein the secondary windings comprise a first secondary winding and a second secondary winding; and (3) pouring epoxy resin to the transformer: putting the coiled windings of the transformer into a mould, vacuumizing, pouring epoxy resin into the mould, drying and baking. The primary windings and the secondary windings of the transformer are separated from each other through copper foils, so the high voltage transformer has the advantages that the transformer can resist electromagnetic interference and the output waveform of the transformer is stable. The epoxy resin is poured under the vacuumizd condition, so the insulation performance of the transformer is improved.
Owner:宿迁三鑫科技有限公司
Novel pulse formation network
InactiveCN103746675AReduce the number of seriesOvercome the disadvantage of not being able to form a pulsed square waveElectric pulse generator circuitsCapacitanceHigh pressure
The invention discloses a novel pulse formation network, belongs to the technical field of pulse power, and is mainly used for generating a high-voltage pulse square wave. The novel pulse formation network is formed by sequentially connecting three stages of pulse capacitors in parallel, wherein an inductor is respectively connected between first output electrodes of each stage of pulse capacitor and the subsequent stage of pulse capacitor and between second output electrodes of each stage of pulse capacitor and the subsequent stage of pulse capacitor. According to the novel pulse formation network, a high-voltage pulse capacitor serves as an energy storage unit which has the advantage of high stored energy density; by the adoption of the non-uniform pulse formation network of a three-capacitor structure, the number of stages of the pulse formation network is decreased, pulse waveform regulation is facilitated, and fast-front quasi-pulse square wave output can be realized. The novel pulse formation network is compact in structure, small in size, high in voltage resistance, high in stored energy density and high in reliability, and can be applied to a hundred-nanosecond pulse power system.
Owner:INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
Sound sensing circuit based on operational amplifier
ActiveCN106911984AStable output waveformReduce complexityTransducer circuitsCapacitanceSignal processing circuits
The invention proposes a sound sensing circuit based on an operational amplifier, which is used for detecting sound and generating a sound sensing signal. The sound sensing circuit comprises a sound signal detection circuit, a one-stage amplification circuit, a signal processing circuit, a two-stage amplification circuit and a shaping circuit. The sound signal detection circuit generates an electrical signal through a voice input device and then sends the electrical signal to the one-stage amplification circuit; and after the electrical signal is amplified, the electrical signal is processed by the signal processing circuit, specifically including that a capacitor C3 performs AC coupling on the signal and a capacitor C4 performs envelope detection on the signal and then the two-stage amplification circuit amplifies the signal, after that, a shaping signal is generated by a Schmidt shaping circuit in the shaping circuit and the shaping signal is outputted by an inverter. After detection, the sound sensing circuit based on the operational amplifier provided by the invention effectively identifies sound signals with a frequency below 20kHz; moreover, the power consumption of the circuit is low, and the quiescent current is about 250muA; and since the circuit has an enable pin, the working state of the circuit can be controlled by signals, thus the overall power consumption can be reduced in combination with other chip applications.
Owner:SHANGHAI TAIXI ELECTRONICS TECH
Wire electrical discharge interpulse or pulse-width PID control constant current probability pulse power supply
PendingCN108723531AStable output waveformPulse width adjustableElectric circuitsDriver circuitPower flow
The invention discloses a wire electrical discharge interpulse or pulse-width PID control constant current probability pulse power supply, and belongs to the technical field of wire electrical discharge. The wire electrical discharge interpulse or pulse-width PID control constant current probability pulse power supply comprises a direct current power supply, a driving circuit, a power amplification circuit, a discharge gap, a Hall current sensor, a current probability detection module and a control module; the direct current power supply is connected with the driving circuit; the driving circuit, the power amplification circuit, the discharge gap, the Hall current sensor, the current probability detection module and the control module are sequentially connected to form a loop; the currentprobability detection module is used for detecting the current in the discharging process and carrying out comparison with a standard value; the control module calculates a current probability after receiving a comparison signal, and carries out control on an interpulse / pulse-width by using an incremental PID control method on the basis so as to control the real-time current probability. The powersupply is particularly suitable for cutting a semiconductor material, cutting efficiency can be improved, and stable and automatic cutting of the semiconductor material is implemented.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +2
LED energy saving lamp
InactiveCN101861026AStable output waveformImprove stabilityElectric light circuit arrangementEnergy saving control techniquesCapacitanceTransformer
The invention relates to an LED energy saving lamp, comprising an LED lamp set and a circuit device thereof. The circuit device comprises a rectification circuit and a filter circuit, wherein the rectification circuit consists of rectistacks VD1-VD4, and the direct current output ends of the rectistacks VD1-VD4 are connected with the LED lamp set; the two ends of an LED lamp set are connected with a filter capacitor C3 in parallel; one alternating input end of the rectistacks VD1-VD4 is connected with a bidirectional thyristor T1 in series, and the two ends of the bidirectional thyristor T1 are connected with a resistance and capacitance phase shifting circuit in parallel; and a bidirectional diode VD is connected between a serial-connection point of a resistor and a capacitor and a trigger electrode of the thyristor T1. In the circuit, since the phase shifting voltage of a phase shifting circuit is used for controlling the breakover of the thyristor, the alternating current input voltage of the rectistacks can be regulated. The alternating current voltage is directly connected to the LED lamp set through rectification and filtering, and the circuit does not contain divider resistors or transformers. The invention has the advantages of energy saving, consumption reduction, simple circuit, low cost and the like.
Owner:吴承斌
Pulse type xenon lamp driver
ActiveCN109451640AImprove efficiencyFast switching speedBatteries circuit arrangementsElectric lighting sourcesSquare waveformPulse waveform
The invention discloses a pulse type xenon lamp driver, comprising an AC220V, an AC-DC power supply circuit, a charging circuit, a capacitor bank, a discharge resistor, a main control board, an IGBT driver, an IGBT, a first diode, a temperature detector, a high voltage board, a second diode and a xenon lamp; the AC220V is connected to the AC-DC power supply circuit, the AC-DC power supply circuitis connected to the charging circuit and the main control board, the charging circuit and the main control board are bidirectionally transmitted, and the charging circuit is connected to the capacitorbank, the temperature detector is connected to the main control board, the main control board is connected to the IGBT driver, the IGBT driver is connected to the IGBT, the IGBT is connected to a positive pole of the capacitor bank and the first diode, and a negative pole of the capacitor bank is connected to the discharge resistor and the xenon lamp. According to the pulse type xenon lamp driverin the invention, the IGBT is used as a high-speed switch, the switching speed is fast, and the output pulse waveform is a square wave, thereby improving the efficiency of the xenon lamp.
Owner:无锡市大华激光设备有限公司
Fuel ignition electronically-controlled circuit of automobile engine
InactiveCN1865690ANo mess stateImprove ignition success rateIgnition automatic controlAutomatic controlCapacitanceIgnition coil
The invention discloses a fuel ignite electric control circuit of vehicle engine. Wherein, the signal input part 1 is connected to the computer control box ECU of electric ignition; the over-voltage and over-current protective circuit 2 is formed by diodes D1, D2, the voltage-stabilizer tube IC2, capacitor and resistance; the shaping detecting circuit 3 is formed by diodes D3, D4 and integrated module IC1; the amplify driving circuit 4 is formed by two IGBT power composite tubes; the power output shaping circuit 5 is formed by two symmetry circuits; the power output part 6 is connected to the input of dry ignite coil. The invention has simple elements, stable output wave, and over-voltage over-current protection, while the product has better stability, to ideally control the ejection ignition and improve the service life.
Owner:李延军
Plasma scalpel power supply control system
PendingCN113262038AStable output waveformRelieve pressureProgramme controlComputer controlCapacitancePower control system
The plasma scalpel power supply control system comprises an active grid-connected rectifying unit, a full-digital full-bridge LLC unit, a low-frequency voltage stabilizing circuit, an envelope line generating circuit, a high-frequency three-level H-type inverter bridge parallel group, a high-frequency high-voltage transformer and an FPGA software module which are connected in sequence. The FPGA software module is respectively connected with the active grid-connected rectifying unit, the full-digital full-bridge LLC unit, the low-frequency voltage stabilizing circuit, the envelope line generating circuit, the high-frequency three-level H-type inverter bridge parallel group and the high-frequency high-voltage transformer. Compared with a traditional power supply, isolation and safety are fully considered, and particularly, the absolute safety of a human body is fully ensured due to the addition of a capacitor charging and discharging link; besides, the working frequency can be improved from 10k level to million level, the wound is not easy to carbonize and heal during cutting, and the blood flow amount in the operation process is smaller.
Owner:ANHUI AOFO MEDICAL EQUIP TECH
Main control circuit capable of realizing intelligent control for water electrolysis machine
InactiveCN103399592AIntelligent power controlReal-time measurement of current feedback parametersControlling ratio of multiple fluid flowsChemical variable controlElectrolysisControl signal
The invention discloses a main control circuit capable of realizing intelligent control for a water electrolysis machine. The main control circuit comprises a testing parameter acquisition unit, a microprocessor IC5 (Integrated Circuit 5) and an electrode plate driving module, wherein the testing parameter acquisition unit is connected with the microprocessor IC5; the microprocessor IC5 is connected with a controlled electrode plate by the electrode plate driving module; the electrode plate driving module comprises a digital signal latch IC3, a digital-analog converter IC4 and a power amplification circuit; the microprocessor IC5 is connected with the controlled electrode plate by the digital signal latch IC3, the digital-analog converter IC4 and the power amplification circuit in sequence. According to the main control circuit disclosed by the invention, pH (Potential of Hydrogen) values, voltage and current feedback parameters in electrolyzed water can be measured in real time and electrolysis parameters of the electrode plate can be intelligently adjusted; the stability of power-supplying voltage of the electrode plate is good; a voltage summit elimination circuit is composed of a diode and is used for limiting the input voltage within a range of 0V-5V so as to have the effective protection effect on a voltage signal processing chip and the microprocessor; the output waveform of a constant-current and constant-voltage simulated control signal Vout is good and the stability of power supply control of the electrode plate is ensured.
Owner:SICHUAN DITEL ELECTRONICS
High-frequency signal output circuit
PendingCN111669151AAdaptableStrong voltage adaptabilityPulse generation by active elementsSignal processing circuitsHemt circuits
The invention relates to a high-frequency signal output circuit. The high-frequency signal output circuit comprises a first signal processing circuit and a second signal processing circuit which are cascaded, a high-frequency square wave signal PWM _ IN is input into the signal input end of the first signal processing circuit, the output end of the first signal processing circuit is connected withthe input end of the second signal processing circuit, and the output end of the second signal processing circuit outputs a stable high-frequency square wave signal PWM _ OUT after amplitude modulation. An input PWM _ IN signal is a PWM square signal sent by a main chip of a vehicle control unit, a working power supply VCC serves as an amplitude modulation reference of the PWM _ IN signal, and astable high-frequency square signal PWM _ OUT is output to serve as signal sampling input of external equipment after the PWM _ IN signal is processed by the circuit provided by the invention. The high-frequency signal output circuit has the characteristics of suitability for various use occasions, wide voltage, stronger adaptability, reliable performance, stable output waveform, extremely low cost, extremely easy purchase of devices and the like.
Owner:DONGFENG AUTOMOBILE ELECTRONICS
Active power electric filter circuit based on three-phase bridge inversion circuit and work method thereof
ActiveCN105790271AReduce usageReduce lossReactive power adjustment/elimination/compensationReactive power compensationPower qualityThree-phase
The present invention provides an active power electric filter circuit based on a three-phase bridge inversion circuit and a work method thereof, relates to a filter circuit, and especially relates to an active power electric filtering circuit based on the three-phase bridge inversion circuit. The present invention provides an active power electric filter circuit based on three-phase bridge inversion circuit and the work method thereof with small switch loss, the much number of output level, the high output voltage grade, the small output waveform fluctuation, the small electric power loss, the little number of direct current side capacitors, the simple control algorithm, small device size and low cost. The collector of a power switch tube 1 with an anti-parallel diode, the collector of a power switch tube with an anti-parallel diode and the collector of a power switch tube 5 with an anti-parallel diode are connected in order. The structure is simple, and the high level output is realized, the filtering effect is good, the output waveform is stable, the number of required devices is few, the loss is reduced and the package size is decreased.
Owner:YANGZHOU POWER SUPPLY CO OF STATE GRID JIANGSU ELECTRIC POWER CO +1
Ultra-low voltage energy storage type cardiac defibrillator
ActiveCN112439128APrecious timeEasy to design and produceLogic circuit coupling arrangementsHeart defibrillatorsLow voltageHemt circuits
The invention relates to an ultra-low voltage energy storage type cardiac defibrillator. The ultra-low voltage energy storage type cardiac defibrillator comprises a power module, wherein the power module is sequentially connected with a charging module, an ultra-low voltage energy storage capacitor, a high-frequency converter, an H-bridge circuit, a defibrillation electrode, a negative feedback circuit and a waveform setting circuit, and the waveform setting circuit is connected with the high-frequency converter. The ultra-low voltage energy storage type cardiac defibrillator can perform defibrillation after being started, is convenient to design, produce and maintain, can output various waveforms, improves the release efficiency, reduces the size, improves the success rate of defibrillation, and is stable and controllable in defibrillation current.
Owner:SHANGHAI UNIV OF MEDICINE & HEALTH SCI
Double-phase constant-flow type cardiac defibrillator
ActiveCN112426627APrecious timeImprove release efficiencyHeart defibrillatorsElectric powerDouble phaseHemt circuits
The invention relates to a double-phase constant-current heart defibrillator which comprises a power supply module, the power supply module is sequentially connected with a charging module, an energystorage capacitor, a high-frequency converter, an H-bridge circuit and a defibrillation electrode, and the H-bridge circuit is sequentially connected with a current detection circuit, an error amplifier and a high-frequency converter. The defibrillator can defibrillate after being started, achieves deep negative feedback, reduces the size of a pulse generator, improves the success rate of defibrillation, and is stable and controllable in defibrillation current.
Owner:SHANGHAI UNIV OF MEDICINE & HEALTH SCI
Magnetic field sensor
InactiveCN101937063BReduce power consumptionReduce areaMagnetic measurementsSignal processing circuitsIsolation layer
The invention discloses a magnetic field sensor chip comprising a magnetic resistance sensor, a Hall sensor and a control integrated circuit, wherein the control integrated circuit is positioned in the same layer with the Hall sensor and surrounds the Hall sensor; the control integrated circuit is used for receiving and processing output signals of the magnetic resistance sensor and the Hall sensor; and the control integrated circuit comprises a power-supply biasing circuit and a signal processing circuit and further comprises a time-sequence control circuit and a signal gating circuit. The magnetic field sensor can be manufactured on a passive isolation layer. The magnetic field sensor chip of the invention can be used for detecting triaxial omnidirectional magnetic-field variation and has the advantages of low power consumption, small area, high sensitivity, strong anti-interference capacity, stable output waveform, and the like.
Owner:上海腾怡半导体有限公司
A kind of shift register and thin film transistor liquid crystal display
ActiveCN103295511BImprove stabilityReduce signal crosstalkStatic indicating devicesDigital storageShift registerCapacitance
The invention provides a shifting register and a thin film transistor liquid crystal displayer. The shifting register comprises multiple levels of shifting register circuits, wherein each of shifting register circuit is composed of eight transistors and two capacitors, each shifting register circuit comprises a pull-up transistor, a first pull-down transistor, a second pull-down transistor, a switch transistor, a first capacitor, a reset transistor, a first auxiliary pull-down transistor, a second auxiliary pull-down transistor, a third auxiliary pull-down transistor and a second capacitor, wherein the pull-up transistor, the first pull-down transistor and the second pull-down transistor are arranged on a signal output module, the first auxiliary pull-down transistor and the second auxiliary pull-down transistor are arranged on an auxiliary pull-down module, and the third auxiliary pull-down transistor and the second capacitor are connected in parallel. The second capacitor serves as a buffer device and can filter out redundant glitch signals of output signals and reduce signal crosstalk. Meanwhile, due to the fact that the first pull-down transistor and the second pull-down transistor respectively work in each half pull-down period, drifting of the threshold voltage due to the over-large breadth-length ratio of each transistor is restrained, and stability of circuits can be ensured. The auxiliary pull-down module is arranged, so that the output waveform of a second node is made to be more stable.
Owner:SHANGHAI AVIC OPTOELECTRONICS
Op amp based acoustic circuit
ActiveCN106911984BStable output waveformReduce complexityTransducer circuitsCapacitanceSignal processing circuits
Owner:SHANGHAI TAIXI ELECTRONICS TECH
Rectifying circuit by utilizing saturable mutual inductor
PendingCN110768547AControl outputFast controlAc-dc conversionDc-dc conversionCapacitanceHemt circuits
A rectifying circuit by utilizing a saturable mutual inductor comprises a bridge type rectifying circuit, a saturable mutual inductor circuit and an LC filter circuit which are sequentially connectedfrom an input end to an output end. The saturable mutual inductor circuit comprises a first triode Q, a first inductor LS, a transformer B, an MOS-FET tube Q1, a second triode Q2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fifth diode D5, a sixth diode D6, a seventh diode D7 and an eighth diode D8. By improving a rectifying circuit commonly used in the UPS and due to theconstraint relation of the MOS-FET, the output condition of the current transformer can be effectively controlled, so that the switching control speed is high, the output current is large, the systemreaction sensitivity is higher, and the output waveform is more stable. The circuit can be used as a rectifier of a two-port device, can be applied to a plurality of rectifying circuits, provides convenience for a rectifying device in the UPS, and has positive guiding significance in engineering practice.
Owner:CHAOYANG POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +2
Totem pole circuit
PendingCN111404502AStable output waveformWith reverse output functionAmplifier modifications to reduce temperature/voltage variationAmplifiers with multiple amplifying elementsPhysicsHemt circuits
The present invention discloses a totem-pole circuit. The totem-pole circuit comprises a triode Q1, a triode Q2, a diode D1 and a diode D2, wherein the triode Q1 and the diode Q2 are of an NPN type. The collector electrode of the triode Q1 is connected with an input voltage Vin, the input voltage Vin is connected with the base electrode of the triode Q1 through a resistor R1, the base electrode ofthe triode Q1 is connected with the collector electrode of the triode Q2 through a diode D2, and the emitter electrode of the triode Q1 is connected with the collector electrode of the triode Q2 through a diode D1. The base electrode of the triode Q2 inputs a driving pulse signal PWM, the emitter electrode is grounded, and the collector electrode is connected with the driving output end. The circuit provided by the invention has more stable circuit performance in a high-temperature environment, and also has a reverse output function.
Owner:GUANGZHOU ZHONGYIGUANG ELECTRONICS TECH
The main control circuit of the electrolytic water machine that can realize intelligent control
InactiveCN103399592BIntelligent power controlReal-time measurement of current feedback parametersControlling ratio of multiple fluid flowsChemical variable controlControl signalElectrolysis of water
The invention discloses a main control circuit capable of realizing intelligent control for a water electrolysis machine. The main control circuit comprises a testing parameter acquisition unit, a microprocessor IC5 (Integrated Circuit 5) and an electrode plate driving module, wherein the testing parameter acquisition unit is connected with the microprocessor IC5; the microprocessor IC5 is connected with a controlled electrode plate by the electrode plate driving module; the electrode plate driving module comprises a digital signal latch IC3, a digital-analog converter IC4 and a power amplification circuit; the microprocessor IC5 is connected with the controlled electrode plate by the digital signal latch IC3, the digital-analog converter IC4 and the power amplification circuit in sequence. According to the main control circuit disclosed by the invention, pH (Potential of Hydrogen) values, voltage and current feedback parameters in electrolyzed water can be measured in real time and electrolysis parameters of the electrode plate can be intelligently adjusted; the stability of power-supplying voltage of the electrode plate is good; a voltage summit elimination circuit is composed of a diode and is used for limiting the input voltage within a range of 0V-5V so as to have the effective protection effect on a voltage signal processing chip and the microprocessor; the output waveform of a constant-current and constant-voltage simulated control signal Vout is good and the stability of power supply control of the electrode plate is ensured.
Owner:SICHUAN DITEL ELECTRONICS
Shift register and drive method, gird drive device, and display device thereof
ActiveCN102800289BStable output waveformReduce glitchesStatic indicating devicesDigital storageShift registerDisplay device
The invention provides a shift register, as well as a drive method, a grid drive device, and a display device thereof. The shift register comprises a precharge unit, a pull-up control unit, a pull-up unit, a pull-down control unit and a pull-down unit, wherein the precharge unit is connected with an initial signal input terminal, a first clock signal input terminal, a control node, and a low level output terminal of a drive power supply; the pull-up control unit is connected with the control node, a pull-up node, the first clock signal input terminal, and a high level output terminal and the low level output terminal of the drive power supply; the pull-down control unit is connected with the control node, a pull-down node, and the high level output terminal and the low level output terminal of the drive power supply; the pull-up unit is connected with the pull-up node and an output terminal; the pull-down unit is connected with the pull-down node, the output terminal and the low level output terminal of the drive power supply respectively; and a first clock signal and a second clock signal are opposite in phase. The utility model solves the problems of unstable output waveforms and high noise.
Owner:BOE TECH GRP CO LTD +1
Traction inverter control system and pwm modulation method
ActiveCN111865125BImprove processing speedImprove processing efficiencyAc-dc conversionBusbarControl system
Owner:CRRC QINGDAO SIFANG ROLLING STOCK RES INST
Resonant wireless power transfer device
ActiveCN106685104BImprove couplingImprove transmission efficiencyCircuit arrangementsMicrocomputerCapacitance
Owner:ZHONGBEI UNIV
GIP circuit for improving display quality and driving method
PendingCN112967697AStable output waveformImprove display qualityStatic indicating devicesOvervoltageControl engineering
The invention discloses a GIP circuit for improving display quality and a driving method. The driving method comprises the following steps: a grid signal G (n-4) is written into a high potential from a t1 moment to a t2 moment, and is written into a low potential at other moments; the clock signal CKn is written into a high potential from the t1 moment to the t2 moment and after the t6 moment, and the clock signal CKn is written into a low potential at other moments; the clock signal CK (n + 4) is written into a high potential from the t1 moment to the t2 moment, the high potential is firstly written into the clock signal CK (n + 4) at the t5 moment and the t6 moment and then is written into a low potential, and the low potential is written into the clock signal CK (n + 4) at other moments; the grid signal G (n) is written into a high potential from the t3 moment to the t4 moment, and is written into a low potential at other moments; and the grid signal G (n + 4) is written into a high potential and then is written into a low potential at the t5 moment and the t6 moment. According to the technical scheme, the voltage of the Q point is suppressed by introducing the Qb node, so that the discharge path of the Q point does not directly pass through the voltage signal VGL, and the attenuation of the voltage of the Q point is effectively avoided.
Owner:FUJIAN HUAJIACAI CO LTD
Traction inverter control system and PWM modulation method
ActiveCN111865125AImprove processing speedImprove processing efficiencyAc-dc conversionControl systemExcitation current
The invention provides a traction inverter control system and a PWM modulation method. The system comprises a main circuit, a first processor, a second processor and a third processor. The main circuit comprises an inversion unit, the input end of the inversion unit is connected with a DC bus, and the output end of the inversion unit is connected with a load motor. The first processor is connectedwith the main circuit; the second processor is connected with the first processor and is used for generating an excitation inductance signal, an excitation current signal and a torque current signalof the load motor; the third processor is connected with the second processor and is used for generating a zero-sequence voltage regulation quantity signal, a load motor control voltage signal and a load motor control frequency signal and carrying out PWM modulation calculation to generate a modulation signal; the first processor receives the modulation signal, modulates the modulation signal to generate a switching pulse signal and sends the switching pulse signal to the inversion unit. The modulation method can realize smooth and stable switching among the modulation modes, inhibits startingcurrent impact, and is easy to realize, reliable and stable based on the control system.
Owner:CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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