559 results about "Resistance capacitance" patented technology

The invention discloses a 10kV armored cable fault distance measurement method based on an additional parallel inductor, and relates to the technical field of power equipment monitoring, and the method comprises the specific steps: S100, additional inductor configuration planning: analyzing the resistance, capacitance and inductance distribution of a power distribution network line and the parameters of an expected fault current. The method effectively solves the problems that the electrical quantity is difficult to detect and the distance measurement precision is influenced by asynchronous data in the fault distance measurement of the power distribution network, and after the power distribution network line breaks down, the line runs for a period of time with the fault by controlling the combination of a protection action and an algorithm and inputting an additional inductor, so that the steady-state electrical quantity is obtained for distance measurement calculation. The method not only increases the measurement time and the amplitude of the negative sequence component, but also provides steady-state positive sequence and negative sequence electrical quantities for distance measurement, so that fault information can be extracted more accurately after a fault occurs.

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

A method for estimating current-dependent non-linear equivalent circuit model (ECM) parameters of a battery may include measuring a battery voltage across terminals of the battery and a battery current drawn from the battery, deriving linear ECM parameters for modeling a linear ECM of the battery with multiple resistive-capacitive elements with different time constants to characterize temporal behaviors of the battery, continuously tracking an impedance for each of the multiple resistive-capacitive elements and an open circuit voltage of the battery, continuously monitoring the battery current to detect high current events, continuously tracking a deviation for each of the multiple resistive-capacitive elements during the high current events, and deriving non-linear online ECM parameters based on the linear ECM parameters and the deviations for the multiple resistive-capacitive elements during the high current events.

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

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

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

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

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

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

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

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

The invention relates to the technical field of display, particularly provides a display panel and a preparation method thereof, and a display device, and aims to solve the problem that the color of the edge and the middle area of the display panel is not uniform due to an FIP scheme. To this end, the display panel of the present application comprises: a substrate; the plurality of functional layers on the substrate comprise a plurality of data lines which are arranged at intervals along a first direction and extend along a second direction crossed with the first direction, and the data lines comprise a first type of data lines and a second type of data lines; the connecting lines are located in the display area, and each connecting line comprises a first connecting part extending in the first direction and a second connecting part extending in the second direction; and the compensation structure is used for reducing the resistance and capacitance load difference on the second type of data lines and the first type of data lines. According to the display panel, the compensation structure is introduced to perform capacitance compensation on the non-FIP area, so that the resistance and capacitance load of the display panel is balanced, the color and the brightness of the display panel are uniform, and the display effect is improved.

The invention provides a resistor and capacitor measuring circuit and method, and relates to the technical field of resistor and capacitor measurement, and the resistor and capacitor measuring circuit comprises a switch S1, a switch S2, a switch S3, a switch S4, a switch S5, a switch S6, a reference capacitor CREF, a capacitor CTEST to be measured, a reference resistor RREF, a resistor RTEST to be measured, a Schmitt trigger u1, a time-to-digital converter TDC and a microprocessor muC. And the Schmitt trigger u1, the time-to-digital converter TDC and the microprocessor muC are sequentially connected in series. According to the resistor-capacitor measuring circuit and method, the discharge time of the reference resistor-capacitor and the discharge time of the resistor-capacitor to be measured are respectively measured through the time-to-digital converter, the time proportion is calculated, and the parameters of the resistor-capacitor to be measured and the resistor-capacitor to be measured are calculated and reversely deduced by combining the known reference capacitor and the resistor. The correction compensation amount is obtained through an additional measurement state, and then the measurement result is corrected, so that the influence of the conduction loss of the switch on the measurement result is greatly reduced.

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

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

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

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

The invention belongs to the field of integrated circuit power supply chip design, and particularly relates to an overshoot and undershoot suppression transient enhancement circuit applied to an LDO (Low Dropout Regulator), which consists of a band-gap reference circuit, an error amplifier, a power tube PMOS (P-channel Metal Oxide Semiconductor) tube MP1, a second-stage amplifier tube NMOS (N-channel Metal Oxide Semiconductor) tube MN1, a resistor R4, a load resistor RL and an on-chip load capacitor CL, the self-adaptive zero point module consists of a resistor R3, a capacitor C1 and an NMOS (N-channel Metal Oxide Semiconductor) tube MN2, the LDO feedback network consists of a resistor R1 and a resistor R2, and the module is used for inhibiting output voltage uprush and downrush. According to the invention, through the upshoot suppression circuit and the undershoot suppression circuit, effective suppression of upshoot and undershoot generated during load sudden change is realized, the recovery time of upshoot and undershoot voltage is shortened, and the upshoot suppression circuit only generates a small amount of quiescent current consumption; the undershoot suppression circuit does not generate extra static consumption under the whole LDO working state due to the effect of the capacitor.

The invention relates to a non-contact conductivity measuring device which comprises an RLC (Radio Link Control) circuit, a signal generator, an oscilloscope and a calculation module, wherein the RLC circuit is formed by connecting a resistor, a capacitor and an inductor in series; the inductor consists of a solenoid and a conductor rod arranged in the center of the solenoid; the signal generator serves as an input voltage source of the RLC circuit; the oscilloscope is used for monitoring voltage signals at two ends of the capacitor and voltage signals at two ends of the input voltage source; the calculation module is used for obtaining the resonant frequency of the RLC circuit according to the ratio of the voltage signals at the two ends of the capacitor to the voltage signals at the two ends of the input voltage source; and the controller is also used for calculating the conductivity of the to-be-measured conductor rod according to the outer radius of the to-be-measured conductor rod, the outer radius of the solenoid, the length of the solenoid, the number of close winding turns of the solenoid, the capacitance value of the capacitor and the resonance frequency. It can be understood that by means of the technical scheme, the conductivity of the conductor rod can be measured in a non-contact mode, and the testing accuracy is high.

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

The utility model discloses an anti-static liquid crystal display module, which is characterized in that a driving IC (integrated circuit) is arranged on the display module, and the display module is connected with an FPC (flexible printed circuit) through the driving IC; the electronic component area is arranged on the FPC and is used for driving a resistor, a capacitor and a diode required by an IC (integrated circuit) in a patch manner; the first copper leakage area surrounds the periphery of the electronic component area and is arranged on the FPC; and the anti-static element is arranged on the electronic component area and is matched with the first copper leakage area to form anti-static protection for electronic components in the electronic component area. According to the anti-static liquid crystal display module, the insulating film is firstly attached to the surface of the electronic component area, the first copper foil with a certain thickness is attached to the insulating film, and the periphery of the first copper foil makes contact with the exposed copper on the periphery of the component area on the FPC. Therefore, the generated static electricity is conducted through the first copper foil and guided into a static electricity release network of the display module through the FPC leakage copper, the static electricity blocking and releasing effects are achieved, and an electronic component area is effectively protected.

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

The invention relates to the technical field of temperature sensors, and particularly discloses a temperature and humidity sensor which comprises a shell body, a circuit board is arranged in the shell body, a data line is welded to one side of the circuit board, and chip pins, resistors, capacitors and welding spots of leads on the circuit board are completely covered with silicone rubber blocks. The waterproof breathable film is installed at the front section of the shell body, the PCB covered with the silicone rubber block is installed in the shell, the rear end of the shell is sealed through the sealing gasket, then resin is filled, and the LED lamp can be normally used for a long time in the environment with the humidity of 90% or above, so that the innovative scheme effectively prevents high-concentration water vapor from corroding and interfering chips and components, and the service life of the LED lamp is prolonged. The reliability and the service life of the sensor are remarkably improved, the reliability and the stability can be shown no matter in a humid environment such as a refrigerator and a cold storage or in other application scenes with strict requirements on temperature and humidity monitoring, and powerful support is provided for temperature and humidity management of a user.

The invention discloses a gallium nitride device driving power supply regulation and control circuit and method. The circuit comprises four modules, namely a rectangular wave generating module, a filtering module, a grid driving module and a power module. The rectangular wave generation module uses a low-cost 555 chip to generate rectangular waves below 2MHz. And the filtering module converts the rectangular waves into direct current meeting requirements and can provide certain current in combination with an operational amplifier. The grid driving module is powered by direct current generated by the filtering module, and the duty ratio and the switching frequency of the gallium nitride transistor grid driving power supply can be flexibly adjusted by adjusting resistance and capacitance values. The power module is a specific circuit applied by the gallium nitride transistor. According to the invention, flexible regulation and control of the gate driving power supply are realized by using the low-cost 555 chip, degradation of parameters such as threshold voltage and on resistance of the gallium nitride transistor in different working modes can be inhibited, and the stability and reliability of the gallium nitride transistor during operation in a circuit are improved.

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

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

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

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

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

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