在微机采样测试系统中,模拟量的采样,通常由 A/D 转换芯片完成。市场上有产品的 A/D 转换接口板可供选择,但一般价格较昂贵,对专业的微机化系统设计者,常须自行设计。首先根据测试结果精度的要求选定 A/D 转换器型号,此后,主要的工作就是围绕 A/D 转换芯片设计满足 A/D 转换器正常工作要求的外围电路。 In the computer sampling test system, the analog sampling, usually done by the A / D converter chip. There are products on the market A / D converter interface board to choose from, but the general price is more expensive, on the professional computer system designers often have to design. First of all, according to the accuracy of the test results to select the A / D converter model, since then, the main work is around the A / D converter chip design to meet the normal requirements of A / D converter peripheral circuits.