一种高精度∑-△A/D转换器的数字滤波器设计  

A Design of Digital Filter Inhigh-Precision ∑-△A/D Converter for Audio Applications

作　　者：徐双恒[1] 李靖[1] 陈华[1] 眭志凌[1] 宁宁[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《微电子学与计算机》2013年第5期92-95,共4页Microelectronics & Computer

摘　　要：设计了一种用于高精度音频∑-△A/D转换器的数字滤波器.该滤波器由级联梳状滤波器(CIC)、补偿滤波器和半带滤波器组成.设计中采用了乘法器分时复用技术以减少电路面积.设计的滤波器可实现128/64两种抽取率,其性能可满足该∑-△A/D转换器的要求.A digital filter in high--precision ∑-△A/D converter for audio applications was designed. The filter is composed of a cascaded--integrator--comb（CIC） filter, a compensation filter and a halfband filter. Time division multiplex technology is used for multipliers to reduce circuit area. The filter supports 128 or 64--time decimation and its performance can satisfy the requirement of the ∑-△A/D converter.

关 键 词：A D转换器 数字滤波器 分时复用 梳状滤波器 半带滤波器 

分 类 号：TN713[电子电信—电路与系统]