带宽可调高阶开关电容滤波器的设计  

Design of High-Order Switched Capacitor Filter with Adjustable Bandwidth

作　　者：胡鹏飞[1,2] 谢亮[1,2] 金湘亮 

机构地区：[1]湘潭大学材料与光电物理学院 [2]微光电与系统集成湖南省工程实验室,湖南湘潭411105

出　　处：《微电子学》2015年第3期357-361,共5页Microelectronics

基　　金：湖南省自然科学基金青年基金资助项目(12JJ4064);教育部新世纪优秀人才支持计划(NCET-11-0975);国家科技重大专项(2011ZX05008-005-04-02)

摘　　要：对高阶开关电容滤波器的设计原理进行了研究,采用级联法进行滤波器的设计,并提出一种带宽可调的方法。借助Filter Solutions软件,设计了带宽可调的6阶开关电容椭圆低通滤波器,并结合Cadence中的Spectre RF进行仿真验证。仿真结果显示,滤波器各项指标满足设计要求,并且带宽可调方法正确有效。The design principles of high-order switched capacitor filter was studied. A filter was designed by cascading biquad switched capacitor filter, then a method for tuning the filter＇s bandwidth was proposed. Filter Solutions software was used to design the 6th-order switched capacitor elliptic lowpass filter with tunable bandwidth, and the schematic was verified through Cadence＇s Spectre RF. The simulation results showed that the filter＇s specifications were basically identical with the design target, and the method of adjusting cut-off frequency was effective and correct.

关 键 词：开关电容滤波器 带宽可调 椭圆低通滤波器 

分 类 号：TN713.92[电子电信—电路与系统]