新颖实用的单片机双积分A/D转换电路和软件

The Novel and Practical Circuit and Software of Double Inegraing A/D Conversion Using Single Chip Computer

通过对双积分A/D转换过程及其原理的分析 ,结合 80 31单片机定时计数器的特点 ,设计出一种新的A/D转换电路 .详细介绍了这种转换电路的硬件原理及工作过程 ,给出了实用的硬件电路与软件设计框图 .通过比较分析 ,可以看出这种A/D转换电路性能价格比较高 ,软件编程简单 ,并且转换速度和精度优于一般的A/D转换电路 .这种设计思路为数模转换器 (A/D)

Based on analysis of the process and principle of dual integrating A/D converter, by using the speciality of timing-counter, an A/D converting circuit is designed. The hardware principle and working process of this cicuit are introduced in detail. The practical hardware circuit and the block diagram of software design are also presented. By comparison and analysis,we draw the conclusion that this conerting circuit has high price performance. Its converting speed and accuracy compare favorably with the usual circuit, furthermore, its software design is simpler.