摘要
Abstract
Based on single chip microcomputer (MCU) STC89C52, the hardware and software implementation of integral direct current digital voltmeter (DVM), which can shift the scale automatically, is introduced in this paper. Based on the principle of double integral A/D converting, a new A/D conversion process is proposed, which increases the converting speed and reduces zero drift rates. Compared with the conventional DVM, this DVM has higher precision, better linearity, and stronger anti-interference.关键词
STC89C52 单片机/量程切换/双积分 A/D 转换Key words
STC89C52 single chip microcomputer/scale shift/double integral A/D converting分类
信息技术与安全科学
