一种sigma-delta ADC数字抽取滤波器设计与实现

Design of A CIC digital filter in sigma-delta ADC

数字滤波器是sigma-delta模数转换器的主要组成部分,用于对调制器输出信号的滤波和抽取。本文设计的数字滤波器是由间接型级联积分梳状滤波器组成。在说明CIC滤波器原理的基础上,通过Verilog实现并验证其功能与性能。

The digital filter is a vital part of sigma-delta ADC,a module that is used to filter and decimating data from modulator.In this article,the digital filter is constituted by cascade CIC filter.Then the function and performance of this module is verified by Verilog.