14位1.5625MHz的ΣΔA/D中的降采样低通滤波器的设计  

Design of the Decimation Low Pass Filter Used in a 14-b 1.5625 MHz Sigma-Delta A/D Converter

作　　者：易婷[1] 方杰[1] 洪志良[1] 

机构地区：[1]复旦大学微电子学系,上海200433

出　　处：《固体电子学研究与进展》2004年第4期455-460,465,共7页Research & Progress of SSE

基　　金：国家自然科学基金 (No .699760 0 9)资助课题"低功耗低电源ΣΔΑ/D变换器研究设计与综合"

摘　　要：介绍了带宽为 70 0kHz ,14 bitΣΔ模数转换器中的降采样低通滤波器的设计。在整个滤波器的设计中 ,从结构上和硬件实现上入手 ,对电路结构进行优化 ,减小电路实现的复杂性 ,从而降低功耗和面积。在此基础上 ,完成了电路设计 ,用 0 .6 μmCMOS工艺综合实现 ,仿真结果显示 ,性能满足设计指标。The design of a decimation low pass filter used in a 14-b 1.5625 MHz Sigma-Delta A/D converter is presented in this paper. In the design of this filter, at all levels from architecture to hardware implementation, techniques are applied to optimize the circuit structure and reduce the circuit complexity in order to minimize the power dissipation and area. Finally, the circuit is synthesized targeted to 0.6 μm CMOS technology. The simulation result proves that its performance meets the design specification.

关 键 词：降采样低通滤波器 子滤波器 有限字长效应 

分 类 号：TN713[电子电信—电路与系统]