用于Σ-Δ数模转换器的重构滤波器的设计  

Design of a Reconstruction Filter in Σ-Δ Digital Analog Converter

作　　者：沈奇臻[1] 戎蒙恬[1] 刘文江[1] 褚炜路[1] 

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《上海交通大学学报》2009年第7期1121-1124,共4页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金委创新研究群体资助项目(60521002);上海-应用材料研究与发展基金(07SA02)

摘　　要：基于重构滤波器在Σ-Δ数模转换器(Σ-ΔDAC)中的作用,选用有限冲击响应滤波器来满足重构滤波功能,并采用Kasier窗函数法设计滤波器系数.提出了一种用电阻抽头网络与电流源组合从而实现滤波器系数的方法.Matlab仿真结果表明,该电路性能满足设计要求.According to the role of reconstruction filter in Σ-Δ digital analog converter, this article chooses the FIR filter to meet the requirement of filter and reconstruction, and uses the Kasier window function to implement the coefficients for filter. Then a method which uses the resistance and current source to struc- ture the filter coefficients was proposed. Eventually, the simulation result by Matlab shows that this circuit can completely satisfy the requirement of the design.

关 键 词：Σ-Δ数模转换器 有限冲击响应滤波器 Kasier窗 重构滤波器 

分 类 号：TN431.1[电子电信—微电子学与固体电子学]