新型高阶Butterworth低通滤波器的设计与分析  

Design and analysis of new high order butterworth low pass filter

作　　者：李钟慎[1] 王永初[1] 

机构地区：[1]华侨大学机电及自动化学院,泉州362021

出　　处：《电子测量技术》2007年第12期16-19,共4页Electronic Measurement Technology

基　　金：福建省自然科学基金(A0410020)资助项目

摘　　要：针对传统Butterworth低通滤波器存在检测精度、稳定性和响应时间之间的矛盾问题,提出了一种新型高阶Butterworth低通滤波器。首先将高阶Butterworth低通滤波器最靠近虚轴的主导极点与虚轴之间的夹角θ指定为常数,剩下的极点均匀地分布在复平面的Butterworth圆周上,从而设计出新型高阶Butterworth低通滤波器。最后对新型高阶Butterworth低通滤波器进行分析,分析结果表明:新型高阶Butterworth低通滤波器的响应速度较快,超调量较小,从而可以提高检测精度。Aiming at the contradictory between test precision, stability and response time of Butterworth low pass filter, a new high order Butterworth low pass filter is put forth in this paper. Firstly designate the dominant poles near virtual axis of low pass filter and the angle between them as constant, the rest poles are redistributed in the Butterworth complex plane circle, so as to design a new high order Butterworth low pass filter. Through analyzing and testing, results show that= compared with the conventional Butterworth low pass filter of the same order, the new filter has rapider response, smaller overshoot. This kind of filter can be used to enhance the test precision.

关 键 词：Butterworth低通滤波器 极点分布 BODE图 阶跃响应曲线 性能指标 

分 类 号：TN713[电子电信—电路与系统]