60 results about "Analogue electronics" patented technology

Provided in the present invention are a temperature effect calibration circuit and method for voltage measurement, and a battery management system and a vehicle. The temperature effect calibration circuit for voltage measurement comprises: a temperature measurement module, which performs measurement and outputs a temperature measurement signal; a sampling module, which samples a voltage to be measured; a reference voltage generation module, which generates a reference voltage; a quantization module, which converts into a digital signal an analog signal output by the sampling module; a compensation parameter calculation module, which performs quadratic fitting and calculation to obtain compensation parameters; and a temperature effect correction module, which corrects an output signal of the quantization module at a current temperature to obtain a corrected voltage measurement signal. In the present invention, there is no need to add a complex circuit design to an analog circuit domain, and thus the design is easier to implement; the requirement for a temperature coefficient of a device in the process is reduced, and thus the technical solution can be applied to various different process nodes; and calibration is performed at a digital backend, and only one instance of full-temperature-range scanning is required during the factory testing of a chip, without spending a large amount of time on a high / low-temperature test, thereby effectively reducing costs.

The application discloses a kind of anti-radiation reinforcement circuits of fast radiation charge, it is related to the field of semiconductor integrated circuit design.The present application is to solve the problem of large area, large power consumption of existing circuit level anti-radiation reinforcement mode, and cannot be applied in the anti-radiation reinforcement design of analog circuit.The voltage generating circuit of the present application is used to provide voltage for charge discharge circuit to trigger charge discharge circuit, so that the charge radiated to the output node of charge discharge circuit is discharged.When the positive voltage pulse of output end appears due to the positive charge pulse generated by radiation particle, the gate of positive charge discharge tube appears positive voltage pulse, the positive charge discharge tube is turned on, and the negative charge discharge tube is closed, so that the positive charge radiated to the output end is discharged;When the negative voltage pulse of output end appears due to the negative charge pulse generated by radiation particle, the gate of negative charge discharge tube appears negative voltage pulse, the negative charge discharge tube is turned on, and the positive charge discharge tube is closed, so that the negative charge radiated to the output end is discharged.

The present application relates to the technical field of analog circuit, and discloses a charge pump.The charge pump comprises a first voltage boosting control circuit, a second voltage boosting control circuit, a first voltage lifting circuit and a second voltage lifting circuit.The first voltage boosting control circuit can generate a first multiplex signal at a first node and a second multiplex signal at a second node in response to an input voltage and a control signal.The second voltage boosting control circuit comprises a third node and a fourth node.The first voltage lifting circuit is connected between the first node and the third node, and the second voltage lifting circuit is connected between the second node and the fourth node.When the control signal is a first level signal, the first voltage lifting circuit lifts the voltage of the third node to a first multiplex voltage according to the first multiplex signal, and the second voltage boosting control circuit outputs a target voltage in response to the first multiplex voltage of the third node and the input voltage.The same is true when the control signal is a second level signal.Therefore, the embodiment does not need to increase an additional circuit to drive the charge pump.

The utility model provides a load simulation circuit and a rack-mounted load box, and belongs to the field of load boxes, the load simulation circuit comprises a rectification circuit, a diverter, a power module, a fan module and a control and drive circuit, the power module comprises at least one heating tube and at least one transistor, the control and drive circuit comprises a main control circuit, a voltage signal processing circuit, a current signal processing circuit, a power setting and display module and at least one IGBT drive circuit, the base electrode of the transistor is connected to the main control circuit through the IGBT drive circuit, and the power setting and display module is connected to the main control circuit; the transistor is connected to the main control circuit through the IGBT driving circuit, the duty ratio adjusting range of the transistor is from 0 to 1, with the rated power of the heating tubes being 2kW as an example, the output power adjusting range of the heating tubes is from 0 to 2kW, and when the three heating tubes are connected in parallel and the rated power of each heating tube is 2kW, the power of the load simulation circuit can be adjusted within the range of 0-6kW. The problem that an existing load box is large in power span is solved, and high-precision power adjustment of the load box is achieved.

The application provides an adaptive ambient light compensation circuit, aiming at the ambient light interference problem in a photoelectric measurement system, and realizes high-precision ambient light compensation through an integrated analog circuit. The circuit adopts PMOS, NMOS transistors and various amplifiers, resistors, capacitors and switch elements, and builds a system capable of self-adaptive adjustment and elimination of the influence of ambient light current. Compared with the prior art, the application utilizes adaptive current sinking and replication current technology, effectively expands the ambient light compensation range to 0-5mA, reduces the circuit area and improves the integration. In addition, by optimizing the design of the filter capacitor and resistor, the settling time is further shortened, and the trade-off problem between the filter bandwidth and the settling time is avoided. The adaptive ambient light compensation circuit of the application has a wide application prospect in the photoelectric measurement system, and can significantly improve the measurement dynamic range and accuracy.

The application discloses a CAN frame double-edge resynchronization decoding method and device, equipment and a storage medium, and relates to the field of signal processing. The scheme obtains the CAN frame signal of the sending end through the CAN simulation circuit, converts the digital waveform, and performs edge detection; based on the clock frequencies of the receiving end and the sending end, the rising edge delay and the falling edge delay of the sending end edge signal relative to the receiving end when the receiving end captures the edge signal are determined; the delay correction configuration is performed based on the rising edge delay and the falling edge delay, and the level timing and signal sampling are performed based on the edge signal after the delay correction; and the CAN frame information is decoded and output based on the bit value output by the signal sampling. The technology accurately calculates and corrects the edge delay difference caused by the clock deviation through the double-edge resynchronization mechanism, effectively corrects the timing deviation in combination with the dynamically adjusted sampling point position, has the advantages of effectively coping with the risk of synchronization failure and improving the decoding stability.

1. Name of the product in this design: Discharge Detection Device. 2. Purpose of this design: This design is used to simulate electrical contact discharge on a circuit board, detect the critical distance during discharge, and present the test results via an oscilloscope. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1. 5. Other situations requiring explanation: Part A is made of transparent material.

The invention relates to a PCB circuit of a three-degree-of-freedom Duffing type MEMS resonator and an event-triggered fuzzy neural network inversion control method, and belongs to the technical field of MEMS resonator control, and the method comprises the steps: constructing an electrostatic coupling three-degree-of-freedom Duffing type MEMS resonator based on a series mode, and building a mathematical model; the method comprises the following steps: designing an analog circuit of a three-degree-of-freedom Duffing type MEMS resonator, and constructing a PCB experiment platform; designing an inversion controller based on a logarithmic obstacle Lyapunov function, an acceleration function, an acceleration exponential integral tracking differentiator and a type-2 fuzzy wavelet neural network; and a switching threshold event triggering mechanism is introduced into the inversion controller.

This invention discloses a full-angle control system and method for a hemispherical gyroscope based on a dual-frequency carrier scheme, employing a dual-frequency carrier excitation / readout scheme. In this scheme, two high-frequency carriers of different frequencies are used to excite / read out the hemispherical gyroscope. x, y The electrostatic driving force signal in the directional direction is modulated and applied to the circumferential excitation electrodes of the gyroscope, causing the vibration signals in the two axes to propagate in mutually independent frequency bands. At this time, the resonator's spherical shell acts as a common capacitor plate; therefore, a front-end amplifier is used to read the modulation signals of the two axes from the resonator, which are then fed into subsequent circuits for filtering and demodulation to obtain the displacement information for each axis. Since the signal originates from... x, y The detection signals from both axes are read out through the same circuit, thereby suppressing the asymmetry of the anisotropic electrodes and x, y This system detects errors caused by asymmetry in analog circuit parameters. It achieves full-angle output functionality for a hemispherical resonant gyroscope and possesses high practical value.

The present invention discloses a cumulative probability density distribution statistical loop circuit, belonging to the field of wireless communications. The circuit extracts the envelope signal of a radio frequency signal through a peak detection module; compares the feedback output voltage and the envelope signal through a cumulative probability density comparison module to obtain a probability density signal; then, in a cumulative probability density quantization module, obtains a cumulative probability density quantized voltage signal; finally, in a cumulative probability density voltage generation module, the output voltage of the circuit is regulated based on the cumulative probability density quantized voltage signal; furthermore, a lock detection module outputs a lock signal to stabilize the output voltage; and a control signal generation module generates a control signal throughout the entire operation process. The present invention is implemented using an analog circuit and has the advantages of a simple structure, low power consumption, and a wide applicable frequency band, making it suitable for amplitude alignment of various signals.

This application provides a compensation circuit, an amplification circuit, and an analog circuit. The compensation circuit includes: a compensation capacitor, with its first terminal coupled to the node to be compensated in the feedback loop; a resistor generating circuit, coupled to the second terminal of the compensation capacitor, for providing a compensation resistor with a first resistance value; and a first current mirror, including a first transistor and a second transistor. The control electrode of the first transistor is coupled to the second terminal of the compensation capacitor, the first current electrode of the first transistor is coupled to the node to be compensated, the second current electrode of the first transistor is coupled to a reference voltage, and the control electrode of the second transistor is coupled to the control electrode of the first transistor via the resistor generating circuit, for providing a first bias voltage to the control electrode of the first transistor according to a first bias current. This application can provide better compensation for the feedback loop with a smaller area, significantly reducing the chip area and cost, and has a wide range of applications.

An adaptable, multistage, multi-rate digital predistortion system that can increase the accuracy of the distortion applied to a power amplifier input signal is disclosed. Further, the digital predistortion system can be implemented using a reduced circuit area by reducing a number of coefficients used by the models applied to generate the distortion compensation signal. Further, the system can implement an improved digital predistortion adaptation engine that improves an adjacent channel leakage ratio of the digital predistortion system. Moreover, the system can compensate for non-linear impairments due to analog / RF circuits and systems and improve at least the following metrics: Error vector magnitude (EVM), adjacent channel leakage ratio (ACLR), spectrum emission mask (SEM), and power consumption of the circuits and systems. An example of circuits and systems is radio frequency power amplifier (RF PA).

The invention discloses an automobile electronic circuit board test fixture which comprises a support, a fluorescent lamp is installed on a sliding block, and the fluorescent lamp irradiates a circuit board at a variable angle to detect the processing capacity of the circuit board on data of an optical sensor. The spraying pipe is provided with spraying holes for spraying air with different temperatures to the circuit board, and the working states of the circuit board in different environments are simulated. According to the invention, multiple detection functions are integrated, and the appearance of the circuit board, the data processing capability of the optical sensor and the performance and stability in different temperature environments can be comprehensively detected at the same time; the automation and intelligence of the detection process are realized, the detection efficiency is greatly improved, and the interference of human factors is reduced; meanwhile, by simulating a real working environment, the performance of the circuit board in actual use can be evaluated more accurately, and powerful support is provided for quality assurance of the automobile electronic circuit board.

A non-contact voltage sensor device is provided with: a probe electrode (10) for observing an AC voltage generated in a cable having a cable conductor and a coating material for coating the cable conductor, without performing electrode connection; an impedance circuit (14) that is connected to the probe electrode and has a first resistance element (142) that simulates the insulation resistance of the coating material, a first capacitor element (141) that simulates the coupling capacitance generated between the cable conductor and the probe electrode, and a dielectric relaxation simulation circuit (143) that simulates the dielectric relaxation generated in the coating material, the first resistance element, the first capacitor element, and the dielectric relaxation simulation circuit being connected in parallel to each other; and an operational amplifier (15), the positive electrode input terminal of which is connected to the reference potential point, the negative electrode input terminal of which is connected to the input point of the impedance circuit, and the output terminal of which is connected to the output point of the impedance circuit, the dielectric relaxation analog circuit having at least one snubber circuit (SC, SC1-SC3) having a series connection of second resistive elements (1431, 51-53) and second capacitor elements (1432, 61-63).

The utility model provides an analog signal acquisition device based on three-dimensional packaging. The device comprises a shell, a three-dimensional packaging structure is arranged in the shell, a signal circuit board, a power supply circuit board and an analog circuit board are sequentially stacked on the three-dimensional packaging structure from bottom to top, and resin is filled among the signal circuit board, the power supply circuit board and the analog circuit board. The side end face of the three-dimensional packaging structure is provided with laser etching lines, the signal circuit board, the power supply circuit board and the analog circuit board are electrically connected through the laser etching lines, and one end of the three-dimensional packaging structure is further provided with a connecting port. The utility model relates to the field of analog signal acquisition devices.

Provided herein are various enhancements for skew balancing in semiconductor circuits, such as during the synthesis, timing, routing, and phases of circuit design. In one example implementation, a method includes simulating a circuit to determine initial path delay values for a set of paths in the circuit, and determining a reference value for the set of paths based on the initial path delay values. The method also includes generating constraints using the reference value and a skew target for the set of paths, and performing a timing analysis to redesign the circuit using the constraints.

The application discloses a low-power digital LDO circuit applied to a radio frequency identification label chip, comprising a bias circuit, a voltage comparator, a ring oscillator, a charge pump circuit, a clamping circuit composed of diode strings D1-DN, a voltage stabilizing capacitor C1, an NMOS transistor N1, voltage dividing resistors R1 and R2; wherein the transistor N1 is a power transistor; the digital LDO load current is set to be the total opening voltage of the diode strings D1-DN when the power transistor gate voltage VG is light load. The application controls the gate of the power transistor through the charge pump circuit, the voltage comparator compares the resistance voltage division VFB of the reference voltage and the output voltage of the digital LDO circuit in real time, when the comparison result is low, the ring oscillator and the charge pump circuit are started to boost the voltage of the power transistor gate, which greatly reduces the overall power consumption of the system compared with the traditional analog LDO circuit; the voltage stabilizing capacitor and the clamping diode discharge path are added to the power transistor gate, thereby reducing the overshoot output voltage ripple of the digital LDO.

The invention discloses a method and system for displaying circuit logic through a self-simulation function and a medium, and belongs to the technical field of circuit principle teaching. The method comprises the following steps: a special electrical primitive library construction stage: editing characteristic logic for each electrical primitive; in the dynamic simulation circuit drawing stage, the electrical primitives are spatially arranged according to a standard circuit diagram layout to form a complete circuit topology; in the circuit simulation stage, a self-simulation engine is started for visual operation; in the real-time rendering stage, circuit logic is rendered in real time, different colors are used for displaying the cable with electricity or without electricity, a current flowing animation is added to the cable with electricity, and an electrical primitive switches a visual state according to an electricity-obtaining / electricity-losing state; in the fault injection stage, a fault injection instruction which is manually or randomly input is responded, a circuit fault event is simulated in the circuit, and a corresponding fault phenomenon, an influence range and a visual prompt are generated. The teaching efficiency can be improved, the training cost is reduced, potential safety hazards are eliminated, and the talent training period is shortened.

The application provides a kind of intelligent arc fault diagnosis method and system based on the cooperation of electric energy meter and circuit breaker, it is related to electrical safety technical field. Including: intelligent circuit breaker real-time monitoring obtains the loop current of the distribution loop;If intelligent circuit breaker determines that current anomaly event is detected according to loop current, then send abnormal early warning information to intelligent electric meter through local communication link;Intelligent electric meter according to the time information corresponding to current anomaly event, call the current characteristic information in the preset time range;Intelligent electric meter determines whether there is arc fault according to the current characteristic information in the preset time range. This method realizes the double determination of arc fault diagnosis through the cooperative processing of intelligent electric meter and intelligent circuit breaker, improves the accuracy of fault diagnosis result. And through the digital twin model built, the running state of the circuit can be simulated, the potential abnormal trend can be predicted, and predictive judgment of arc fault is realized.

A method for converting a digital signal into an analog signal, the method comprising: Providing a digital-to-analog converter (340, 430) including an array of digital-to-analog elements (431, 432, 510) configured to operate over a plurality of time steps, each digital-to-analog element being configured to convert a digital value to an analog value in each time step; Generating a plurality of control sequences for controlling the arrangement of digital / analog elements based on the digital signal, and after identifying that the digital signal is below a threshold, shortening the control sequences; and for each time step: identifying a first set of elements and a second set of elements among the array of digital / analog elements; Applying the shortened control sequences to the first set; Deactivating the second set; and Shift the first set and the second set by one element.

A radio frequency transceiver adjusting method includes configuring a controller to execute a circuit matching software module to perform a first transmission test on a radio frequency transceiver to generate a plurality of circuit test results, select a target simulated circuit from a plurality of reference simulated circuits, match the target simulated circuit to the radio frequency transceiver, execute a filter setting software module to set a filter parameter group, convert the filter parameter group into an initial configuration data, import the initial configuration data to the radio frequency transceiver, execute a configuration adjusting software module to perform a second transmission test on the radio frequency transceiver to generate a plurality of parameter test results, select a target parameter from a plurality of reference parameters, and adjust the initial configuration data according to the target parameter.

A device for emulating a high-voltage storage device in a vehicle test bench comprises a cell emulator unit and a control and monitoring unit (14), wherein the cell emulator unit includes a temperature sensor emulation circuit comprising a primary sensor circuit (32), the primary sensor circuit (32) comprising a primary voltage divider (34), and wherein a first output voltage of the primary voltage divider (34) is adjustable via a primary pulse width modulation source (39). The cell emulator unit (20) is configured to transmit a primary voltage measurement value to the control and monitoring unit (14) via the primary voltage divider (34), and the control and monitoring unit (14) is configured to determine a temperature value of the primary sensor circuit (32) based on the transmitted primary voltage measurement value.

The disclosed technology relates to an integrated electronics system for OCT. In some examples, the integrated electronics system includes an integrated circuit configured to generate image data based on OCT interference signals for display. The integrated circuit includes an analog circuit, a core processing subsystem, and a backend processing subsystem. The analog circuit receives and digitizes the OCT interference signals to generate digitized interference signals. The core processing subsystem generates image data based on the digitized interference signals. The backend processing subsystem receives and processes the image data for display to a user.

The invention discloses a program-controlled battery simulation system and an implementation method thereof, the program-controlled battery simulation system comprises an input port, a power supply isolation circuit, a level conversion isolation circuit, a battery simulation circuit and an output port, the input port is connected with an external power supply interface and a communication interface and is used for inputting system voltage and an I2C level signal; the power supply isolation circuit is connected with the input port and is used for outputting isolation power supply voltage according to the system voltage; the level conversion isolation circuit is connected with the input port and is used for performing level conversion and isolation on the I2C level signal and outputting a target I2C signal; the battery simulation circuit is connected with the power supply isolation circuit and the level conversion isolation circuit and is used for outputting target voltage according to the isolation power supply voltage and the target I2C signal; and the output port is connected with the battery simulation circuit and is used for simulating a battery interface. The device is smaller in size and lower in cost, can be suitable for more application scenes, and can be widely applied to the technical field of battery simulation.

Analog circuit for receiving a current signal for frequency decomposition using a plurality of transistors configured to receive a first current, a first drain coupled to a third drain at a third transistor, and a signal input applied to a first gate for determining current flowing through the first / second transistors; second transistor including a second source configured to receive the first current, second drain coupled to a fourth drain at fourth transistor, and the signal input applied to a second gate for determining current flowing through the second transistor, third transistor including a third source configured to receive a second current and signal input applied to a third gate for determining current flowing through the third transistor, and fourth transistor including a fourth source configured to receive the second current and signal input applied to a first gate for determining current flowing through the fourth transistor.

The utility model provides a high-frequency AC voltage analog circuit. The high-frequency AC voltage analog circuit comprises a power supply module; the signal generator is used for generating an initial alternating current voltage with a preset frequency; the signal isolator is connected with the power supply module and the signal generator, can output the initial alternating-current voltage as a first alternating-current voltage and a second alternating-current voltage of differential signals, and has an electrical isolation function; and the power operational amplifier is connected with the power supply module and the signal isolator and can amplify the first alternating voltage and the second alternating voltage and output a third alternating voltage, and the third alternating voltage is provided for a battery management system for testing. The high-frequency alternating-current voltage analog circuit can simulate high-frequency alternating-current voltage, is low in cost and achieves miniaturization.

The present invention discloses a miniature circuit breaker. The technical solution comprises a first housing, a leakage self-test module for simulating circuit leakage, and a fixing assembly for fixing the leakage self-test module. The fixing assembly comprises a second housing, the leakage self-test module being disposed within the second housing, the second housing being provided with a plug, a clamping rod, and a reset hole, and the first housing being provided with an electrical connection hole. The plug is electrically connected to the leakage self-test module, and the plug is inserted into the electrical connection hole and electrically connected. The present invention has the following beneficial effects: when the leakage self-test module is damaged and needs to be disassembled, a button is pressed, and one end of the button presses the clamping rod, disengaging the clamping connector from the slot, thereby enabling the second housing to be removed from the first housing, facilitating disassembly and replacement. Repairs can be completed without replacing the circuit breaker, thus avoiding waste.

The invention provides an LDO (Low Dropout Regulator) ground short circuit protection device, which comprises a first LDO, a second LDO, a third LDO and a fourth LDO, the voltage sampling module is used for sampling the high-voltage domain power supply voltage and generating sampling voltage; the band-gap reference source is used for generating reference voltage; the ground short circuit detection and control module is used for judging whether the first LDO generates a ground short circuit or not according to the reference voltage and the sampling voltage and generating a control signal, and the control signal is used for controlling the output of the first LDO to be turned off or turned on. The circuit is realized in a pure analog circuit voltage detection mode, no auxiliary circuit such as a clock signal generation circuit, a delay circuit and a clock synchronization circuit is needed, and the circuit is simple in implementation mode, rapid in response, small in occupied area and low in power consumption.

This invention discloses an easily integrated all-MOS structure memristor analog circuit, which consists of two functional modules: a current-multiplexed integrator module and an operational transconductance amplifier module. M1-M3 constitute the current-multiplexed integrator module, used to convert the input voltage to the integration control voltage and memorize the historical state of the input voltage signal; M1 and M2 form a current-multiplexed structure, and M3 acts as a MOS transistor capacitor to achieve the integration function. M4-M8 constitute the operational transconductance amplifier module, used to realize the resistive-change memory characteristic of the memristor analog circuit; M4 and M5 form a completely symmetrical current mirror structure, M6 and M7 are differential input pairs with identical structure and parameters, and M8 serves as a tail current source. This invention features a simple circuit structure that is easy to integrate, consisting of only eight MOS transistors, eliminating the need for discrete components such as operational amplifiers and multipliers, and meeting the requirements for miniaturization, low power consumption, and wide bandwidth.

This invention discloses a parallel charging method for multiple solar cell units with independent maximum power points (MPPs), comprising: sampling the voltage and current of each solar cell separately, obtaining the current power signal through analog multiplication; storing the previous power signal through an analog sample-and-hold circuit; differentially comparing the current and previous power signals, and determining the disturbance direction based on the comparison result; simultaneously calculating the power change rate and the common DC bus voltage fluctuation, and adaptively adjusting the disturbance period and disturbance step size accordingly, so that each cell independently approaches its MPP; and inputting each output in parallel to an energy storage unit after reverse current isolation. This invention uses a pure analog circuit to achieve dual-parameter adaptive MPP tracking, eliminating the need for a digital controller, and features fast response, low steady-state oscillation, and low power consumption, making it particularly suitable for unattended micro-power photovoltaic parallel charging systems such as marine buoys.