基于80C196的数控直流电流源设计

Design of Numerical-Control DC Supplier Based on 80C196

基于80C196的数控直流电流源由16位单片机80C196、A/D转换电路、D/A转换电路、镜像电流源和运放电路组成,通过D/A转换器的输出控制镜像电流源的输出电流,使其能够在20mA^2000mA范围内变化,数码显示电流的设定值和检测值。该系统具有加减步进调整功能,步进为1mA,以及纹波电流小的特点。

This supplier consists of such components as 16 bits single-chip computer 80C196,A/D converter,D/A converter,current mirror and amplifier.The output of current mirror is controlled by D/A converter to make it range from 20mA to 2000mA.A digital displayer is used to display the current set-value and examination-value.This system has a function to change the steeping by addition or subtraction of 1mA,and is characterized by its small ripple current.