Development and Testing of a Simple Circuit Characteristic Tester System

Abstract

The simple circuit characteristic tester system is based on circuit construction and design. The system uses the f407 of the STM32 chip as the main control chip, and combines the test circuit and the basic operational amplifier circuit (voltage follower), RC filter circuit, relay control. The circuit and the triode regulator circuit are tested. The system uses a single-chip microcomputer to generate a sine wave (DAC) with amplitude of 0-3.3VPWM and amplitude of 0.1-1V, and then attenuates ten times as an input by the op amp, and performs ADC sampling comparison on a specific part of the circuit to complete the input resistance and output resistance of the circuit. And the gain and frequency characteristic curve at the frequency of 1KHZ. Finally, the system can automatically measure and measure the fault of a given component through programming. The system analyzes and compares the output waveform at a specific circuit as a single-chip microcomputer. The input is then judged by the processing of the microcontroller. In the process of system operation, the OPA2314 operational amplifier is used. The triode adopts the Model 9013. A small capacitor with a value of 100nF is added between the power supply and the ground, which enables the system test to be successfully completed.