16 results about "Discrete circuit" patented technology

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.

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.

Hand-operated, motor-driven tool with motor control circuit. The invention relates to a hand-operated motor-driven working device having a user-operated control unit and a motor control circuit. According to the invention, the motor control circuit comprises a control unit which is configured to receive a motor operating signal (BS) from the operating unit and to generate a motor control signal (SS) as a function thereof, a motor function enabling unit which is configured to generate a motor function enabling signal as a function of a supplied enabling control signal (FS), and a redundancy control circuit (4) designed as a discrete electrical circuit which is configured to receive the motor operating signal (BS) and the motor control signal (SS) and to generate the enabling control signal (FS) as a function thereof. Use e.g. for ground-guided or hand-carried garden or forestry equipment with battery-powered electric motor or with combustion engine.

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.

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.

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.

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.

The invention discloses an electronic blood glucose, blood oxygen and blood pressure three-in-one PCBA board, and belongs to the technical field of blood glucose, blood oxygen and blood pressure monitoring. The electronic blood glucose, blood oxygen and blood pressure three-in-one PCBA board comprises an integration module, a sensor signal monitoring module, a main control module and a calibration compensation module. The technical problem that the prior art lacks blood sugar and blood pressure data and cannot help a user or medical personnel to accurately judge the health condition is solved. The redundant space of discrete circuits is greatly reduced, the blood pressure, blood sugar and blood oxygen functions are integrally designed on one PCBA board, the overall system architecture is simplified, collaborative analysis of multiple parameters can be conveniently achieved, the signal transmission loss between the discrete circuits can be reduced through the integrated design, one-stop health detection can be achieved through integrated equipment, and the system is suitable for popularization and application. The system does not need to carry various detection instruments, is more convenient to operate, can provide a comprehensive health assessment report, and helps a user or medical personnel to accurately judge the health condition.

This invention relates to the field of power electronics technology and discloses a power management circuit, a power supply system, and a vehicle. The invention utilizes discrete circuits to meet the power supply requirements of various power sources. A BUCK circuit is used to step down the voltage, satisfying voltage conversion under a 48V power supply. The stepped-down voltage is then converted into corresponding analog, digital, and core power supply voltages via analog power conversion circuits, digital power conversion circuits, and core power conversion circuits, respectively, to meet the power supply requirements of the controller system. A power management controller monitors the output signals of the BUCK circuit, analog power conversion circuit, digital power conversion circuit, and core power conversion circuit, and controls the operation of each circuit to achieve flexible control of power supply capacity and mode, and ensure circuit safety during operation. This eliminates the need for a dedicated power management chip, resulting in a simple and low-cost circuit structure, thus reducing power management costs.

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.

The invention relates to the technical field of power electronics, and discloses a power supply management circuit, a power supply system and a vehicle, the power supply requirements of various power supplies are met through discrete circuits, a BUCK circuit is arranged to realize voltage reduction, voltage conversion under 48V power supply can be met, and the power supply efficiency is improved. The voltage after voltage reduction is converted into corresponding analog power supply voltage, digital power supply voltage and core power supply voltage through an analog power conversion circuit, a digital power conversion circuit and a core power conversion circuit, so that the power supply requirement of a controller system is met. And a power management controller is arranged to monitor output signals of the BUCK circuit, the analog power conversion circuit, the digital power conversion circuit and the core power conversion circuit and perform operation control on each circuit, so that flexible control on the power supply capacity and the power supply mode is realized, the circuit safety in the circuit operation process is guaranteed, and the service life of the circuit is prolonged. Therefore, a special power management chip is not needed, the circuit structure is simple, the cost is low, and the power management cost is reduced.

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.

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.

This invention discloses a video signal conversion circuit and method for weather radar simulation. The conversion circuit includes a synchronization signal merging circuit, a green synchronization generation circuit, a first color signal input amplification circuit, a second color signal input amplification circuit, a first color signal differential circuit, a second color signal differential circuit, and a third color signal differential circuit. Beneficial effects: This invention uses discrete gate circuits and operational amplifier circuits, resulting in a concise and effective design with low overall cost. The discrete circuits also offer high reliability and are less prone to failure. If a fault occurs, only the relevant individual circuit needs to be replaced, rather than the entire large-scale integrated circuit, simplifying repair and reducing maintenance costs. This video signal conversion circuit effectively solves the signal conversion and matching problem between mainstream computer HDMI signals and specialized industry-specific displays.

A semiconductor test system has a test fixture with a plurality of test sites. Each test site has a DUT placement area and an electrical test circuit dedicated for a DUT to perform voltage and current testing. The electrical test circuit has a voltage measuring block and a current measuring block. The voltage measuring block has an analog-to-digital converter for converting an analog voltage measurement to a digital voltage measurement. The current measuring block has a resistor conducting a current to be measured, an amplifier with a first input and a second input coupled across the resistor, and an analog-to-digital converter with an input coupled to an output of the amplifier and an output for providing a digital current measurement. A test control system controls the test fixture. The electrical test circuit can be an integrated circuit or a discrete circuit.

The invention relates to the technical field of communication, and discloses a single-line multi-channel communication device and a control method thereof. The device comprises a plurality of communication modules, a first communication main body and a second communication main body, each communication module comprises a first communication unit and a second communication unit which are connected; the first communication main body comprises a plurality of first communication serial ports used for sending or receiving data, and the first communication serial ports correspond to the first communication units and are connected with the first communication units; the second communication main body comprises a plurality of second communication serial ports used for sending or receiving data, and the second communication serial ports correspond to the second communication units and are connected with the second communication units; single-bus communication is realized through connection between the first communication unit and the second communication unit, multi-channel communication is realized through arrangement of the first communication serial port and the second communication serial port, use of discrete devices can be reduced, design of discrete circuits can be simplified, design difficulty is reduced, thread consumption is reduced, and product miniaturization is facilitated.