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.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
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)
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
sigma-delta digital analog converter (Σ-Δ DAC)
finite impulse response (FIR) filters Kasierwindow
reconstruction filter