序言在微机应用中A/D转换的分辨率或位数会直接影响系统的精度,从实用性方面考虑,性能价格比较为理想的是8位逐坎逼近式A/D芯片。它可以满足一般的控制要求,但很难满足计量检测方面的要求。而要选用更高位数的A/D芯片,其价格就会大幅度提高。本文提出 Preamble In computer applications, A / D conversion resolution or the number of bits will directly affect the accuracy of the system, from the practical aspects of consideration, the performance price is ideal for 8-bit per-card approximation A / D chip. It can meet the general control requirements, but it is difficult to meet the requirements of measurement and testing. And to choose a higher digit A / D chip, the price will be greatly increased. This article is proposed