模数 转换器的设计是一个巨大挑战，因为它具有必须在系统级加以考虑的各种不同的输入采样结构。本文将探讨几种通用的输入采样结构，并讨论每种结构对系统其它部 分的影响。-ADC is designed to be a great challenge, because it has to be at the system level to be taken into account a variety of different input sampling structure. This article will explore several common input sampling structure, and discuss each type of structure on the impact of other parts of the system.