460 results about "Simple circuit" patented technology

The invention provides an acquisition circuit, a temperature acquisition method, a circuit system and electronic equipment. The acquisition circuit comprises a first signal acquisition port, a plurality of second signal acquisition ports, a first acquisition unit and a plurality of second acquisition units. Wherein the first acquisition unit comprises a value taking resistor and a first pull-up resistor, the first pull-up resistor is located in the chip, a first reference voltage is connected to a first end of the first pull-up resistor, and a second end of the first pull-up resistor is connected with a first end of the value taking resistor through a first signal acquisition port; the second acquisition unit comprises a second pull-up resistor and a thermistor, the second pull-up resistor is located in the chip, the first end of the second pull-up resistor is connected with the first reference voltage, and the second end of the second pull-up resistor is connected with the first end of the thermistor through a second signal acquisition port. Therefore, the acquisition circuit can realize voltage acquisition of one end of the thermistor by using a simple circuit, so that the acquisition circuit is low in cost and simple in wiring design.

The invention discloses a power battery active equalization control system based on SOC prediction, belongs to the technical field of battery management, and aims to solve the defect that the capacity fading of a battery pack cannot be fundamentally solved by a traditional voltage equalization strategy. According to the system, a dual-active half-bridge equalizer topology is adopted, a second-order RC equivalent circuit model and an FFRLS-EKF joint algorithm are combined to achieve high-precision SOC estimation, and the error is reduced by more than 20% compared with a traditional open-circuit voltage method; a phase shift and duty ratio combined control strategy is innovatively provided, the on-off state of an MOSFET and PWM signal parameters are adjusted in real time, the equalization current is cooperatively regulated and controlled, and the problem of pseudo equalization is solved. According to the method, the SOC of the battery pack can be quickly converged under the working conditions of standing, charging and discharging, the maximum deviation is reduced to 1.49% from 63.2%, the equalization efficiency is improved by more than 10%, and the method has the characteristics of simple circuit, efficient algorithm and strong expansibility, and is suitable for scenes such as a power battery system and an energy storage power station.

The present application relates to the field of plasma generators and discloses a plasma generator and electronic device based on a single emitter head. The plasma generator includes: a power input terminal configured to receive an external power supply; a resonant trigger circuit coupled to the power input terminal, the resonant trigger circuit including a bidirectional trigger switch and an energy storage capacitor; a transformer, the primary winding of the transformer being connected in series with the bidirectional trigger switch and the energy storage capacitor in the resonant trigger circuit to form a primary loop, the transformer being used to generate resonance under the action of charging and discharging the energy storage capacitor and outputting a resonant peak through a secondary winding; a emitter head coupled to one end of the secondary winding via a coupler, the resonant peak being used to generate positive and negative ions through the emitter head; and an isolation device coupled between the primary and secondary windings of the transformer. The present application realizes the generation of positive and negative ions using a single emitter head, has a simple circuit structure, and effectively solves the problem of difficult assembly of dual emitters in traditional solutions.

The invention provides a voltage difference monitoring device and method for a bootstrap switching power supply and the switching power supply. The device comprises a voltage difference detection module which is configured to detect the voltage difference between the two ends of a bootstrap capacitor and generate a lower tube conduction indication signal if the voltage difference does not reach a set threshold value; the lower tube forced conduction module is configured to generate a plurality of continuous pulse signals according to the lower tube conduction indication signal so as to conduct a lower transistor when the pulse signals are in high level, so that the bootstrap capacitor is charged through the first power supply voltage until the voltage difference reaches a set threshold value; and the negative current detection module is configured to send a forced turn-off signal to the lower transistor forced turn-on module and end the turn-on period, corresponding to the current pulse signal, of the lower transistor if a negative current greater than a threshold value is detected during the period of turning on the lower transistor through the pulse signal. According to the invention, high differential pressure detection precision is realized through a simple circuit structure.

A time-interleaved ADC mismatch correction method and time-interleaved ADC relating to the technical field of integrated circuits are disclosed. The time-interleaved ADC mismatch correction method and time-interleaved ADC solve problems with high-order filter modules and signal overflow or saturation risks. The applied technical scheme uses time-interleaved ADC output signal(s) and a fitted signal to calculate a set of filtering coefficients, and uses this set of filtering coefficients to correct the ADC output signal in real time. The applied technical scheme compensates for differences in the frequency response of each channel, rather than the frequency response itself, and the filter order is smaller, the implementation is simpler, and the circuit design complexity and device cost are greatly reduced. The technical solution has a wide range of adaptability, can correct and improve broadband interleaving performance, and avoids the signal overflow / saturation risk because the compensation range is small.

The invention provides a quartz crystal microbalance resonant frequency detection system, a control method and a terminal, a direct digital frequency synthesis excitation unit is adopted to generate a frequency sweep excitation signal with a preset frequency range and stepping, and the frequency sweep excitation signal is conditioned by a signal injection and conditioning unit and then injected into a QCM sensor. And then the pure amplitude response detection unit measures and quantifies voltage response amplitudes of the QCM sensor under different excitation frequencies, and the resonant frequency intelligent determination unit determines the resonant frequency of the QCM sensor according to the voltage response amplitudes. According to the invention, a QCM self-oscillation circuit does not need to be designed and debugged, a precise phase detection assembly does not need to be configured, the circuit board layout is simpler, and components are greatly reduced. The QCM resonant frequency can be accurately measured only through efficient amplitude detection, a complex algorithm is avoided, the operational capability requirement and the software development difficulty are reduced, the QCM resonant frequency measuring device has the advantages of being simple in structure, low in cost, easy to integrate and the like, miniaturization and low-power-consumption design can be easily achieved, and the QCM resonant frequency measuring device is suitable for portable and wearable application.

The invention discloses an inverter circuit topological structure for driving double three-phase motors, and belongs to the technical field of power generation, power transformation or power distribution. The topology comprises a six-phase bridge arm, a switching tube in the bridge arm is connected in series with a diode, and a branch after the switching tube is connected in series with the diode is inversely connected in parallel with a diode. A plurality of switching tubes and diodes of the topology are connected according to a specific rule, a reverse current path is blocked by serially connecting the diodes, and current mutation in the switching process is reduced; and meanwhile, an anti-parallel diode is used for maintaining a continuous current path, normal work of the circuit is ensured, and the circuit has the advantages of simple circuit design, low control cost, high efficiency and the like, and is widely applicable to low-voltage and high-current dual-three-phase motor driving scenes.

The invention provides an MCU network address automatic generation circuit supporting hot plug, which comprises a master control MCU, a plurality of nodes, a plurality of voltage measurement circuits, a plurality of equivalent resistors and a plurality of open-drain modules, the master control MCU end is in parallel connection with each node through a network interface connecting line, each node is in parallel connection with each equivalent resistor through an address line, and the open-drain modules are in parallel connection with the master control MCU end. The main control MCU comprises three ports, namely a port 1, a port 2 and a port 3, the port 1 and the port 2 are communication ports, the port 3 is an address generation control port and works in a push-pull output state, the port 1 of each node is connected to a voltage measurement function circuit, the port 2 of each node is connected to a voltage control port of an open-drain module, and the open-drain module is an NMOS (N-channel Metal Oxide Semiconductor) tube. According to the scheme, automatic generation of the network node address can be completed without manual participation, hot plugging is supported, the circuit structure is simple, the cost is low, and high expandability is achieved.

The utility model provides a radio frequency power amplifier and a radio frequency chip. The radio frequency power amplifier comprises an amplifier, a first adjustable attenuation circuit, a second adjustable attenuation circuit and a first capacitor. Compared with the prior art, the first adjustable attenuation circuit and the second adjustable attenuation circuit are additionally arranged at the input end of the amplifier, input attenuation protection is achieved by adopting a simple circuit structure, the number of used devices is small, and the chip area cost can be effectively saved. Meanwhile, the input attenuation amount of the first adjustable attenuation circuit and the second adjustable attenuation circuit can be flexibly adjusted through a digital control bit and an analog control voltage, and free adjustment of different attenuation amounts at different temperatures is achieved; meanwhile, the input end of the amplifier is simple in structure, complex feedback loop control is avoided, the response speed is higher, and deterioration of the radio frequency performance of an amplifier channel is smaller.

The utility model relates to the technical field of memories, in particular to a word line selection circuit, a memory array and a flash memory, the word line selection circuit comprises: a replacement determination module, the first input end and the second input end of which respectively input the first flag bit information and the second flag bit information of a selected redundant word line; the first input end of the redundancy control module is connected with the output end of the replacement determination module, the second input end of the redundancy control module inputs the address of the operation word line, and the third input end of the redundancy control module inputs the replacement address of the selected redundancy word line; and the output end of the comparator is connected with the address decoding circuit of the storage array and the address decoding circuit of the redundant array and is used for outputting replacement selection signals. The word line selection circuit provided by the utility model can solve the problems of complex control logic in the existing redundancy replacement process and complex circuit structure for redundancy replacement, and has the advantages of simple circuit structure and control logic, quick response and accurate judgment.

The utility model belongs to the technical field of electronic circuits, and discloses a simple circuit capable of generating negative precision voltage reference and resisting high temperature of 200 DEG C. The simple circuit comprises a positive reference voltage source U1, a capacitor C1 and an operational amplifier U2, the output end of the positive reference voltage source U1 is connected to the inverted input end of the operational amplifier U2 through the isolation resistor R, the input end of the positive reference voltage source U1 is connected to a VCC power supply, and the GND pin of the positive reference voltage source U1 is connected to the output end of the operational amplifier U2; a pin 3 of the positive reference voltage source U1 is connected to a VCC power supply; a pin 3 of the positive input end of the operational amplifier U2 is grounded, and a pin 2 of the operational amplifier U2 is connected with a negative power supply; the two ends of the capacitor C1 are connected with the floating ground end of the positive reference voltage source U1 and the output end of the positive reference voltage source U1. According to the utility model, fewer components are used, and the precision is higher; the circuit has flexibility, and different negative precision voltage references can be generated by selecting different reference voltage sources and amplifier combinations; and the negative voltage reference generated by the module at the high temperature of 200 DEG C still has very good temperature stability.

The utility model provides a power-down holding circuit for a switching power supply, which relates to the technical field of switching circuits and comprises a thermistor RT2, a diode D1 and a plurality of electrolytic capacitor banks connected in parallel, and the thermistor RT2 is connected in series with the electrolytic capacitor banks after being connected in parallel with the diode D1. According to the utility model, the circuit structure is simple, and components are few; the impact current is effectively reduced by adopting the power-down holding circuit; and after the input power supply is cut off, the diode D1 is used for discharging the loop, so that the output delay power failure is realized. Meanwhile, by changing parameter matching and device type selection of the power-down holding circuit, different power-down holding time is achieved, the performance is reliable, and therefore the design cost is greatly reduced.

The utility model provides a charging device of a mining heavy truck power battery, the mining heavy truck power battery comprises a vehicle-mounted battery cluster and a DCDC corresponding to the battery cluster, the mining heavy truck power battery is connected with a mining truck load, the charging device comprises a rectifier bridge charging station and a liquid cooling charging gun, the rectifier bridge charging station is directly connected with an incoming line power supply and the liquid cooling charging gun, the incoming line power supply is converted into direct current through the rectifier bridge charging station, and the power battery of the heavy truck is charged through the liquid cooling charging gun. The adopted rectifier bridge charging station is simple in structure and simplified in circuit, DCDC is the existing equipment of the original truck, the cost is greatly reduced, the problem that more than 10 battery clusters and charging interfaces are needed between the original mining center truck and the charging station is solved, only 1-2 charging guns are used for connection, operation is easy and convenient, and the requirement for use under the field working condition is better met.

This invention provides an adaptive AGC control circuit and method for broadband RF front-ends. The circuit includes: a gain tuning circuit connected to the RF link of the broadband RF front-end; and a signal detection circuit connected to the gain tuning circuit. The signal detection circuit is used to sample the RF signal in the RF link of the broadband RF front-end through an ADC, and to perform signal processing and gain control on the sampled RF signal based on an FPGA, thereby controlling the gain tuning circuit. This invention uses an FPGA+ADC hardware solution to achieve real-time detection and closed-loop fast control to realize adaptive AGC control of the broadband RF front-end, which has the following characteristics: 1. Simple circuit structure, clear logic, and easy implementation; 2. Real-time signal acquisition and processing with low state control delay; 3. High accuracy of dual-threshold signal detection and discrimination; 4. Flexible and controllable gain, and wide applicability.

The present invention discloses a residual current protection test method, which belongs to the field of low-voltage electrical technology. A simulated residual current signal is input to a test coil on a residual current transformer, and the residual current protection function module is verified to be normal based on the response of the residual current protection function module to the simulated residual current signal; the simulated residual current signal is input according to the following method: an identical pulse signal is input at both ends of the test coil according to a time difference Δt, and the time difference Δt satisfies: t w ≤Δt≤T‑t w , t w , T represent the pulse width and pulse period of the pulse signal, respectively. The present invention also discloses a residual current protection test device and a circuit breaker. Compared to existing technologies, the present invention effectively eliminates the effect of residual magnetism on the measurement accuracy of the residual current transformer without requiring demagnetization during the test process. Furthermore, the present invention has a simple circuit structure, low implementation cost, and high reliability.

The utility model discloses a wide-voltage bidirectional charging and discharging device of an electric bicycle, which comprises a main control unit, a half-bridge driving circuit, a bidirectional half-bridge circuit, a filter circuit, a load switch unit and an input / output port, the output end of the half-bridge drive circuit is connected to the drive end of the bidirectional half-bridge circuit, the high potential end and the low potential end of the bidirectional half-bridge circuit are connected to a battery BAT and the ground respectively, and the input / output end of the bidirectional half-bridge circuit is connected to the first end of the filter circuit. The second end of the filter circuit is connected to the first switch end of the load switch unit, the second switch end of the load switch unit is connected to the input / output port, and the control end of the load switch unit is connected to the main control unit. The circuit structure is simpler, the application cost is lower, and the application requirements are better met.

According to the Ethernet circuit structure with the bypass switching function, when the control module outputs the state keeping control signal, the bypass switching module keeps the original connection mode; when the control module outputs a main path connection control signal, the first network device and the switch are connected through the bypass switching module, the second network module and the switch are connected, and a main path connection mode is achieved. When the control module outputs a bypass connection control signal, a bypass connection mode of the first network device 1 and the second network device 2 is realized by means of the bypass switching module. The Bypass function of the Ethernet port is enabled and disabled by means of a simple circuit, the circuit structure is simple, and the design cost of the Bypass is reduced.

The utility model relates to a switching power supply circuit and electronic equipment. The circuit comprises a power supply input end, a power supply output end, a transformer comprising a primary winding and a secondary winding, a main power switch unit, an active clamping unit, a clamping driving unit, a voltage dividing unit and a built-in MOS control chip. The main power switch unit is connected with the power supply input end, the primary winding and the voltage division unit, and is switched on when receiving voltage division output of the voltage division unit; the voltage dividing unit is connected with the power supply input end and the built-in MOS control chip, and generates divided voltage output when the built-in MOS control chip is switched on; the clamping driving unit is connected with the built-in MOS control chip and generates a first driving level when the clamping driving unit is switched on and generates a second driving level when the clamping driving unit is switched off, and the active clamping unit is connected with the primary winding and the clamping driving unit, is switched off when receiving the first driving level and is switched on when receiving the second driving level. According to the utility model, the loop loading capability and the voltage stress bearing capability can be improved through a simple circuit design.

The invention discloses a high over-bias variable load type quenching device for a single photon avalanche diode, and the device comprises a quenching unit which is used for changing the resistance of a variable load tube to infinity to rapidly cut off the avalanche current when the single photon avalanche diode is avalanche, thereby achieving the variable load type quenching; the reset unit is used for generating a delay-adjustable reset signal after quenching is completed, and controlling the single photon avalanche diode to recover to a to-be-detected state; and the high over-bias supporting unit is used for enabling the two ends of the single photon avalanche diode to obtain over-bias higher than the power supply voltage under the low-voltage process. The quenching and resetting time of the quenching circuit is effectively shortened through a simple circuit structure, and meanwhile, the photon detection probability can be greatly improved through the high over-bias voltage which is nearly twice of the power supply voltage.

The invention discloses a power cost control active-to-passive control conversion circuit, a converter and a wiring method, and relates to the technical field of power cost control. The control conversion circuit comprises an analog-to-digital conversion unit, an isolation unit, a delay unit, a trigger unit and an output unit, the control conversion circuit is connected in series in a control loop between the intelligent electric energy meter and the circuit breaker, and an alternating current control signal sent by the intelligent electric energy meter is converted into a passive contact to be output through the control conversion circuit. Therefore, switching-on and switching-off control of the circuit breaker is realized, and the problems that a protection device cannot be additionally arranged in an active output mode and cost control of a simple circuit breaker containing high-supply and low-metering users cannot be realized are solved.

The invention provides a control circuit and device for electronic anode protection, and relates to the technical field of electronic anode protection. A comparator module is used for controlling on-off of a switching tube, based on the on-off condition of the switching tube, the voltage of the positive and negative ends of an electronic anode module is controlled, when the electronic anode module is connected into a circuit, the switching tube is switched on, the voltage of a first voltage source is applied to the positive input end of a comparator, and the voltage value of the first voltage source is larger than that of a second voltage source. The output end of the comparator module outputs high level to turn off the switching tube, based on the virtual short characteristic of the comparator module, the voltage of the positive electrode end of the electronic anode module follows the voltage of the second voltage source, at the moment, the voltage of the positive electrode end and the negative electrode end of the electronic anode module is insufficient to drive the electronic anode module to work, and the electronic anode stops working. According to the scheme, extra control parts such as a chip are not needed, only a simple circuit structure is adopted, accelerated corrosion of the electronic anode is avoided, the control logic is simple, and the reliability is high.

The invention discloses a quasi-single-stage micro inverter and electronic equipment, the quasi-single-stage micro inverter comprises a boost converter circuit and a buck converter circuit, the boost converter circuit is coupled with the buck converter circuit, one of the boost converter circuit and the buck converter circuit is coupled with a power grid end, and the other of the boost converter circuit and the buck converter circuit is coupled with a power grid end. The other one of the boost converter circuit and the buck converter circuit is coupled with the direct current end; wherein when the absolute value of the power grid voltage is smaller than the mode switching voltage, the buck converter circuit is controlled to carry out buck work, and the boost converter circuit is controlled to work in the optimal efficiency working condition; the absolute value of the power grid voltage is greater than the mode switching voltage; if yes, controlling the boost converter circuit to perform boost work and controlling the buck converter circuit to work in the optimal efficiency working condition. By means of the mode, the quasi-single-stage micro inverter is higher in efficiency and easy to control, and circuit parameters are convenient to optimize.

The present invention provides a driving device and method for a laser radar light-emitting device, as well as a laser radar including the driving device. The driving device includes: a voltage regulation module configured to receive an input pulse voltage signal and output an intermediate voltage level, wherein the equivalent resistance of the voltage regulation module can be adjusted to change the output intermediate voltage level; and a driving module that receives the intermediate voltage level and provides a driving current to the light-emitting device to drive the light-emitting device to emit light, wherein the driving current is at least partially dependent on the intermediate voltage level. The solution of the present invention can directly control the driving current of the light-emitting device used in the laser radar, and has a relatively simple circuit design, a short current transmission path, and a fast response speed.

The application provides a multistage bandwidth regulation photodetector assembly, which comprises a first printed circuit board, a second printed circuit board, and a first printed circuit board electrically connected with the second printed circuit board; the second printed circuit board is printed with a first open loop circuit, and the first open loop circuit comprises at least one resistor which is connected in series; a third printed circuit board is electrically connected with the second printed circuit board; the third printed circuit board is printed with a second open loop circuit, and the second open loop circuit comprises at least one capacitor which is connected in series; a photodetector is arranged on the surface of the first printed circuit board and is electrically connected with the first open loop circuit and the second open loop circuit respectively; and a thin film circuit is arranged on the surface of the first printed circuit board and is electrically connected with the photodetector. The multistage bandwidth regulation photodetector assembly has a simple structure and stable circuit connection, and the resistance and capacitance of the assembly can be actively regulated, so that the bandwidth of the assembly can be autonomously regulated.

The utility model relates to the technical field of power supply circuits, in particular to a bipolar output circuit for a photoresist constant-temperature power supply, which comprises a bipolar inverter circuit, a driving control circuit and an auxiliary power supply circuit. The isolation driving circuit uses a simple optical coupler device, a special digital driver or a high-speed driving optical coupler is not needed, an upper tube driving auxiliary power supply directly couples to generate two paths of driving power supplies through a mode of adding an auxiliary winding on an inductor of a conventional PWM converter, an additional independent auxiliary power supply is not needed, a bipolar voltage output function is realized, and the voltage output is realized. The circuit has the advantages of no physical contact, long service life, simple circuit and low cost.

The invention belongs to the field of wireless communication power amplifiers, and particularly relates to a radio frequency power amplifier for IMT international mobile communication. The radio frequency power amplifier in the design is a board-level radio frequency power amplifier. The radio frequency power amplifier in the design can cover an n104 frequency band (6.425-7.125 GHz) in international mobile communication (IMT); the circuit has the advantages of being simple in structure and small in size while meeting good index requirements. The power amplifier has a wide application prospect in the field of wireless communication power amplifiers, and further development of related wireless communication technologies can be promoted.

The invention discloses a circuit for automatically switching test devices and a test box. The circuit for automatically switching the test device comprises a control module and a plurality of test branches, each test branch is used for providing a load device; when the control module carries out on-load test on a board card of the semiconductor parameter analyzer, one test branch is switched on, and other test branches are switched off, so that the switched-on test branch provides an external load device for the board card. According to the invention, the board card can be stably and reliably subjected to the on-load function test by adopting a simple circuit and a control process, tedious connection and frequent device replacement are avoided, the corresponding test efficiency can be improved, and the corresponding test cost is reduced.

This application provides a switching power supply, control method, and charger with a wide input / output voltage range, relating to the field of switching power supply technology. The switching power supply includes a transformer, a power transistor, a PWM IC chip, two auxiliary winding power supply circuits, and a protocol control chip. Each auxiliary winding power supply circuit includes a charge pump and an auxiliary winding. Each auxiliary winding is magnetically coupled to the primary winding of the transformer. One of the auxiliary winding power supply circuits also includes a voltage regulator, with its two ends connected to the two auxiliary windings via two charge pumps. The first end of the voltage regulator is connected to the power supply terminal of the PWM IC chip. The protocol control chip is configured to increase its power consumption when the input AC voltage meets a preset worst-case power supply stability condition. This application embodiment can improve the power supply stability of the PWM IC chip while maintaining the power consumption defined by the protocol standard under non-full load conditions, and has a simpler circuit structure.

The utility model discloses a seven-level inverter topology, which relates to the technical field of multi-level structures and comprises an upper bridge arm and a lower bridge arm, the upper bridge arm and the lower bridge arm are mutually symmetrical except for the direction of a diode, and a plurality of switch tubes, direct current bus capacitors and flying capacitors in the upper bridge arm and the lower bridge arm are connected according to a specific rule. Working modes with seven different output voltages are realized by controlling the conduction state of the switch tube; the topology realizes voltage division through the DC bus capacitor, realizes intermediate level transition through the flying capacitor, combines an optimized circuit structure and a control strategy, has the advantages of simple circuit design, high efficiency, stable output voltage and the like, and is widely applicable to high-voltage and high-power inverter systems.

The invention provides an overvoltage peak absorption circuit. The overvoltage peak absorption circuit comprises an overvoltage detection module, an overvoltage driving module, an energy-saving driving module, an initial driving module and a peak absorption module. When no overvoltage exists at the load end, the energy-saving driving module outputs a low-level signal to the peak absorption module, so that the peak absorption module is kept in a cut-off state; when the load has an overvoltage peak, the overvoltage detection module monitors the voltage of the load in real time and inputs current to the overvoltage driving module, and the overvoltage driving module outputs a high-level signal to drive the peak absorption module to absorb; if a peak appears at the initial stage of power-on, the initial driving module directly obtains load voltage and outputs a high-level signal to trigger peak absorption. The overvoltage peak absorption circuit provided by the invention only acts at an overvoltage moment, has no static loss during normal work, and effectively improves the reliability of the circuit by virtue of a simple circuit structure and rapid response.