随着微机被广泛地应用于计量领域,许多测量仪器需要与微机配接,实现测量自动化。本文介绍一个电感测微仪与8031单片机配接的接口电路。 电感测微仪输出的是模拟电压信号,需经过滤波、放大,采样保持、限幅,再经A/D转换离散数字信号送入计算机。 一、滤波及放大电路 As computers are widely used in the field of metering, many measuring instruments need to be interfaced with a microcomputer to automate the measurement. This article describes an inductive micrometer and 8031 ​​microcontroller with the interface circuit. Inductance micrometer output is an analog voltage signal, subject to filtering, amplification, sample and hold, limiting, and then A / D conversion discrete digital signal into the computer. First, filter and amplifier circuit