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9 results about "Discrete circuit" patented technology

A discrete circuit is an electronic circuit built out of discrete components, such as resistors, transistors, etc., instead of a single integrated circuit. Discrete circuits include individual electronic components including resistors, capacitors, and diodes, as opposed to integrated circuits, which include these components on a chip. Proponents of discrete circuits argue that because discrete components are larger, they carry a higher voltage and are less susceptible to electrical interference. Discrete circuits may also be desirable in developing application-specific designs, where it can occasionally be difficult to locate an appropriate off-the-shelf IC and the set-up cost of designing a new IC may be prohibitive. Alternatively, discrete circuitry may be preferred over ICs in a given case. Discrete circuits use individual resistors, capacitors, diodes, transistors, and other devices to achieve the circuit function. These individual or discrete parts must be interconnected. The usual approach is to use a circuit board. This method, however, increases the cost of the circuit. The board, assembly, soldering, and testing all make up a part of the cost.

Virtual impedance compensation method for permanent magnet synchronous generator constant admittance modeling

The invention discloses a virtual impedance compensation method for permanent magnet synchronous generator constant admittance modeling, and relates to the technical field of electromagnetic transient modeling of permanent magnet synchronous generators, and the method comprises the steps: firstly, carrying out the discretization of a permanent magnet synchronous generator model; secondly, decomposing the equivalent resistance matrix into a time-invariant part and a time-varying part; then, virtual impedance is added to the q axis of the generator model; thirdly, constructing a generator constant admittance model; thirdly, a converter accompanying discrete circuit model is integrated, a complete permanent magnet synchronous generator constant admittance model is formed, and a node admittance equation is established based on the Kirchhoff's current law; and finally, executing electromagnetic transient simulation. According to the method, constant admittance modeling is achieved based on virtual impedance compensation, the requirement for real-time inversion of a time-varying admittance matrix is eliminated, simulation calculation resource consumption is remarkably reduced, small errors are kept under various working conditions, and efficient simulation of a large-scale permanent magnet synchronous generator system is supported.
Owner:NORTH CHINA ELECTRIC POWER UNIV +2

Digital signal processing universal board card

The invention discloses a digital signal processing universal board card, which comprises a processor circuit with a DSP (Digital Signal Processor), a reset circuit connected with the input end of the DSP, a communication circuit connected with the DSP, a discrete magnitude circuit connected with the DSP, an analog quantity circuit connected with the DSP, and a storage circuit interactively connected with the DSP, the pin end of the DSP processor can be configured with a GPIO interface, a PWM interface, an SPI / CAN interface or an Xintr interface. The device has the advantages of being small in size, light in weight, complete in function and high in expansibility, can achieve the functions of discrete magnitude input and output, analog quantity collection, communication and fault storage which are universal for power supplies, motors and power distribution type aviation airborne products, improves the signal comprehensive processing capacity of airborne equipment, and improves the reliability of the airborne equipment. The problems of accuracy, universality and the like caused by ADC precision limitation and serious board card customization in the prior art are solved.
Owner:GUIYANG AVIATION MOTOR

RF MIMO Communication System with Signal Restructuring

A signal restructure unit for radio frequency (RF) antenna systems includes four ports and a signal routing circuit. The signal routing circuit receives RF signals at input ports and provides phase-controlled outputs to antenna ports. When receiving sum signals, the unit provides in-phase restructured signals for common-mode antenna operation. When receiving difference signals, the unit provides anti-phase restructured signals for differential-mode antenna operation. The signal routing circuit may be implemented as a rat-race coupler with transmission line segments or as discrete circuit elements including inductors and capacitors. An RF communication system incorporates the signal restructure unit with digital processing circuits, transceivers, and antennas to achieve MIMO operation from a single antenna structure. The system provides improved isolation while reducing the antenna size. The restructure unit enables reconfigurable MIMO operation with enhanced performance for wireless communication applications.
Owner:MEDIATEK INC

Electrocardiographic monitoring device

The utility model relates to a kind of electrocardiograph monitoring equipment, belong to electrocardiograph monitoring technical field, this electrocardiograph monitoring equipment includes: front-end signal processing circuit, for the filtered processing of input lead signal, obtain filtered lead signal;Lead signal includes 3 lead signal or 5 lead signal;Drive signal processing circuit, for selecting drive signal in filtered lead signal based on the waveform to be displayed and selecting drive lead in lead;Drive lead and drive signal are used to eliminate common-mode interference signal;Collector, for collecting lead signal after eliminating common-mode interference signal, generate electrocardiogram waveform.The utility model is built using discrete circuit to realize simultaneously supporting 5 lead and 3 lead electrocardiograph acquisition, can select different price and performance discrete component to build electrocardiograph monitoring system according to actual demand, optimize cost, while discrete circuit can be customized according to specific application requirement Design, function extension is more convenient, improve flexibility.
Owner:WUHAN ZHONGQI BIOLOGICAL MEDICAL ELECTRONICS

Motor stalling protection driving circuit

PendingCN122092154AAvoid customization restrictionsImplement automatic stall protectionEmergency protective circuit arrangementsElectric machineHemt circuits
The invention discloses a motor locked-rotor protection driving circuit, which relates to the field of motor locked-rotor protection, and is characterized in that a first thermosensitive detection unit and a second thermosensitive detection unit are respectively connected between two output ends of a motor and a corresponding power switch unit in series; and the control module automatically pulls down the control end of the connected power switch unit to be below a cut-off threshold value during stalling, so that a corresponding current path is cut off, and automatic stalling protection is realized. Although the scheme is realized on the basis of discrete electronic elements, a current sampling resistor, a voltage comparator and a latch logic circuit which are necessary in a traditional discrete scheme are omitted through a thermal-electric direct linkage mechanism, and self-triggering protection can be completed only through few devices such as a thermistor, a bipolar transistor and a bias resistor; according to the invention, customization limitation of a special driving chip is avoided, defects of large size, high cost and low reliability of a traditional discrete circuit are overcome, a topological structure is obviously simplified, and system cost, size and failure rate are reduced.
Owner:NINGBO FULAI ELECTRONIC TECH CO LTD

Real-time simulation optimization method for accessing large-scale network construction type equipment into direct-current power grid

The invention discloses a real-time simulation optimization method for accessing large-scale network construction equipment into a direct-current power grid, which is realized on the basis of a cooperative computing framework consisting of a multi-core CPU (Central Processing Unit) and at least one FPGA (Field Programmable Gate Array), and comprises the following steps of: on the multi-core CPU of a main simulation machine, carrying out sub-network division and task allocation on the large-scale direct-current power grid; constructing a global network equation for solving to obtain a node admittance equation; performing space decoupling and equipment decoupling on the global network equation by using a transmission line decoupling method and / or an ideal transformer method to form a plurality of sub-problems which can be subjected to parallel computing; solving a node admittance equation on the multi-core CPU to obtain a key electrical quantity of a power grid side; on the FPGA, on the basis of the received key electrical quantity, real-time simulation calculation is carried out on the grid-forming converter and a controller of the grid-forming converter by adopting an adjoint discrete circuit model method, and a control signal is generated; and on the multi-core CPU, the calculation of the next simulation step length is carried out through the control signal received from the FPGA.
Owner:CHINA ELECTRIC POWER RESEARCH INSTITUTE CO LTD +1

Zynq-based arbitrary waveform signal generator and generation control method

The invention provides a Zynq-based arbitrary waveform signal generator and a Zynq-based arbitrary waveform signal generation control method, and the signal generator comprises a system main control module which is integrated at an ARM end of a Zynq chip and is used for controlling a system flow, receiving and verifying waveform data or waveform parameters from external control equipment, and driving a communication interface; the signal generation module is integrated at the FPGA end of the Zynq chip and is used for analyzing the waveform parameter and generating a waveform signal; and data interaction is carried out between the ARM end and the FPGA end through an AXI high-speed bus. A main control function and a signal generation function are integrated in a single Zynq chip, a traditional double-chip design such as a single-chip processor and a CPLD or a discrete circuit is replaced, the number of external assemblies is effectively reduced, the system complexity and the PCB layout area are reduced, and meanwhile power consumption and production cost are reduced.
Owner:TIANJIN JINHANG COMP TECH RES INST

Porous alumina film humidity sensor system with signal conditioning function

The invention discloses a porous alumina film humidity sensor system with a signal conditioning function, and belongs to the technical field of sensors. The system comprises a humidity-sensitive unit and a signal conditioning and displaying unit. The humidity-sensitive unit is composed of a lower electrode substrate, a porous alumina film and a metal upper electrode. The signal conditioning and display unit adopts an FDC2214 capacitance digital converter module, the input end of the signal conditioning and display unit is connected with the humidity sensitive unit, and capacitance changes are converted into digital signals in real time; the humidity value is calculated through the microcontroller according to the pre-stored calibration data and is displayed by the display module in real time. The high-performance humidity-sensitive film is prepared through the micro-arc oxidation-secondary anodic oxidation-aging process, a traditional discrete circuit is replaced with a high-integration-level special chip, integration, digitization and intelligentization of humidity sensing are achieved, the humidity sensor has the advantages of being compact in structure, high in precision and easy to integrate, and the humidity sensor is suitable for popularization and application. The method is suitable for the fields of environment monitoring, industrial control and Internet of Things.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Discreetly constructed overcurrent protection device, corresponding control unit and motor vehicle with it

The invention relates to an overcurrent protection device (4) constructed with a discrete circuit. In this device, a measuring resistor and a main path transistor (T1) for switching the interruption of the main current path are arranged in a main current path. The discrete circuit also includes a comparator circuit for comparing a voltage drop (USh1-USh2) across the measuring resistor (RM) with a predetermined voltage threshold by means of a first comparator (K1). An output of the first comparator (K1) is connected to the main path transistor (T1) to switch it off when the voltage threshold is exceeded.The comparator circuit is also configured as a memory circuit for a detected overcurrent condition and, upon exceeding the voltage threshold, applies a voltage signal above the voltage threshold to a measuring input of the first comparator (K1), regardless of whether the overcurrent condition continues, thus keeping the main path transistor (T1) switched off. The invention also relates to a control unit (4) with such an overcurrent protection device (4) and a motor vehicle (1) equipped therewith.
Owner:VOLKSWAGEN AG