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近几年有不少文章介绍用多片低分辨率Ａ/Ｄ及Ｄ/Ａ转换芯片组成高分辨Ａ/Ｄ转换器 ,但实际上往往并不可行。这里介绍一种简单的方法 ,它可采用廉价微处理器和转换器获得较高分辨力的方法。1 系统设计原理设我们需要测量大于 2 0 0ｋＰａ的压力。使用一个压力传感器和一个放大
In recent years, many articles introduce the use of multi-chip low-resolution A / D and D / A converter chip to form high-resolution A / D converter, but in fact often not feasible. Here is an easy way to get a higher resolution using inexpensive microprocessors and converters. 1 system design principle Let us need to measure the pressure greater than 200kPa. Use a pressure sensor and a zoom