37 results about "Analogue electronics" patented technology

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 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.

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 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 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.

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.

The application discloses a kind of based on LC cascade circuit's power cable broadband impedance physical simulation method and device, belong to power cable state diagnosis technical field.The method is replaced by LC cascade circuit equivalent to replace entity cable, accurately reproduces the broadband impedance characteristic of different voltage grades, different length power cable of 10kV~500kV.Detailed steps include: determining cable unit length distribution parameter, calculating cable basic characteristic parameter, determining LC simulation circuit unit number and lumped parameter, establishing LC cascade circuit model and setting work frequency band.The application greatly reduces the cost and land requirement of experimental platform, can construct standardized cable simulation platform, supports large-scale personnel practical operation training, provides unified calibration reference for instrument performance test, and has significant economic and social benefits.

The invention belongs to the field of wireless communication, relates to a variable gain amplifier in a phased array system, and particularly provides a broadband variable gain amplifier which comprises an input matching circuit, a gain control circuit and an output matching circuit. On one hand, by adopting the multi-stage LC matching circuit, better input and output standing waves can be realized, and the insertion loss of the matching circuit is effectively reduced; and on the other hand, the gain control circuit with the active source input cross coupling structure is adopted, the influence of parasitic capacitance Cds of the MOS tubes can be effectively counteracted, so that additional phase shift caused by gain change is reduced, meanwhile, grid voltages of the two MOS tubes in the normal-phase branch and the reverse-phase branch are in complementary change, and therefore, the gain change of the two MOS tubes in the normal-phase branch and the reverse-phase branch is reduced. The input and output impedance change of the gain control circuit is small; in addition, the grid voltage of the MOS tube can be finely controlled through an analog circuit, so that the variable gain amplifier can realize a wider gain control range and higher amplitude precision.

The application provides a common voltage load simulation circuit and a display device. The load simulation circuit comprises a measured circuit unit, a load simulation circuit unit and an auxiliary circuit unit. The load simulation circuit unit comprises a signal generator, an amplification circuit and a resistance-capacitance series circuit. The resistance-capacitance series circuit can completely filter out the alternating current component in the output voltage of the load simulation circuit to the input end of the measured circuit unit, and then superimpose the direct current component output by the auxiliary circuit unit to the input end of the measured circuit unit. The voltage at the input end of the measured circuit unit is consistent with the output voltage of the load simulation circuit, and no attenuation is generated. Therefore, the accuracy of the compensation effect of the measured operational amplifier can be improved, the operational amplifiers with consistent compensation capabilities can be screened out, and the consistency of the display effect of the liquid crystal display panel using the operational amplifiers with the same specification and produced by different manufacturers can be improved.

This invention discloses a PWM signal generation method, module, and related apparatus. The PWM signal generation method includes: sampling a comparison signal based on a sampling period; determining the magnitude relationship between the actual current and the commanded current of the motor based on the comparison signal; selecting either the upper or lower switching transistor of the driver based on the determination result; determining whether the current on-time of the selected switching transistor has reached the minimum on-time; if so, generating an upper transistor control signal and / or a lower transistor control signal based on the determination result; otherwise, re-sampling the comparison signal based on the sampling period. According to the PWM signal generation method, module, and related apparatus of this invention, only the actual current and the commanded current need to be compared, making analog circuit calibration easier. Furthermore, the determination of the switching transistor's on-time and dead time is introduced, which can ensure the safety of the switching devices.

Proposed is a device for emulating a high-voltage accumulator in a vehicle test stand, the device comprising a cell emulator unit and a control and monitoring unit (14), wherein the cell emulator unit has a temperature sensor emulation circuit which comprises a primary sensor circuit (32), wherein the primary sensor circuit (32) has a primary voltage divider (34), and wherein a first output voltage of the primary voltage divider (34) can be set by means of a primary pulse width modulation source (39). The cell emulator unit (20) is designed to transmit a primary voltage measurement value to the control and monitoring unit (14) by means of the primary voltage divider (34), and the control and monitoring unit (14) is designed to determine a temperature value of the primary sensor circuit (32) on the basis of the transmitted primary voltage measurement value.

The invention discloses a two-dimensional Ising model evolution simulation circuit based on a threshold voltage type memristor, belongs to the technical field of microelectronics, and is used for simulating the evolution process of a two-dimensional Ising model. Comprising a plurality of Ising nodes arranged in an array of M rows and N columns, a plurality of Ising node coupling circuits in one-to-one correspondence with the Ising nodes, a random bit stream generator, power supply terminals VCC, VDD, VEE and GND, and signal input terminals UCLK, URESET and UINPUTEN, high speed of spin state storage and miniaturization of the circuit are considered, energy calculation is accurate, state overturning control logic is clear, and the stability of the circuit is improved. The evolutionary process of the two-dimensional Ising model can be efficiently simulated, reliable core circuit support is provided for the design of an Ising machine, and meanwhile, the accuracy and stability of evolutionary simulation are improved.

A device may include a plurality of digital signal processors (DSPs) and a plurality of analog crossbars connected to the DSPs. A microcontroller unit may be operable to facilitate network isolation.

The invention provides an asynchronous wake-up circuit system which is divided into an analog circuit part and a digital circuit part. The analog circuit part comprises an oscillator; the digital circuit part comprises a wake-up control module, a clock control module and a system state machine; the clock control module is realized by adopting an asynchronous circuit and is used for outputting a power failure control signal; the oscillator outputs the clock signal in response to the fact that the power-down control signal is at a low level; the oscillator outputs no signal in response to the condition that the power-down control signal is at a high level; the wake-up control module is used for receiving the wake-up signal and outputting a wake-up event; the system state machine is used for controlling mode switching of the system and comprises a sleep mode and a normal working mode. Therefore, the dual problems that the dynamic power consumption in the dormant state cannot be eliminated by the traditional clock gating and the wake-up delay of the power gating technology is long are effectively solved.

In a semiconductor integrated circuit, a first analog circuit block operates by a voltage applied between a first node and a third node. Each of a plurality of first current sources has a first end connected to the third node and a second end connected to the first analog circuit block. The plurality of first current sources function as current sourcing or current sinking for the first analog circuit block. A first switch group is provided between the plurality of first current sources and the first analog circuit block, and in a test mode, individually switches electrical connection of the second end of each of the plurality of first current sources from the first analog circuit block to a second node.