利用程控增益放大器提高A/D转换分辨力

INCREASE A/D CONVERSION RESOLUTION BY PROGRAMMED GAIN AMPLIFIER

分析了程控增益放大器的原理，利用它提高Ａ／Ｄ转换分辨力。给出了电原理图、调试方法及程序流程。

This paper clarifies the theory of programmed gain amplifier and the theory about increasing the resolution of A/D convertion.It puts forword the circuit,the way to debug and the program flow.And its application is also described.