无漂移有源低通滤波器的统计灵敏度优化

山东大学学报(工学版)

无漂移有源低通滤波器的统计灵敏度优化

洪晓芳¹, 陈涤¹，吴世军²

1. 山东大学信息科学与工程学院，山东济南250100;2. 山东经贸职业学院，机电工程系，山东潍坊261011

收稿日期:2006-11-03 修回日期:1900-01-01 出版日期:2007-08-24 发布日期:2007-08-24
通讯作者: 洪晓芳

Statistic sensitivity optimization of non-drift all-pole active low-pass filters

NG Xiao-fang¹,CHEN Di¹,WU Shi-jun²

1. School of Information Science and Engineering,Shandong University;2. Department of Electrical Engineering,Shandong Vocational Institute of Trade and Economy,Weifang 261011,China

Received:2006-11-03 Revised:1900-01-01 Online:2007-08-24 Published:2007-08-24
Contact: HONG Xiao-fang

摘要/Abstract

摘要： 任意阶无漂移全极点有源低通滤波器因信道无漂移特性而具有广泛的应用价值.针对该有源低通滤波系统模型不能表述为二阶节级联形式，其参数设计复杂的问题，根据统计灵敏度测度的定义，首先通过理论推导，提出了对该低通滤波系统的统计灵敏度进行优化的方法；然后由低阶系统模型验证了该方法的可行性；最后得出结论，即全部自由变量β_i均为1时系统统计灵敏度最低.这个结论大大降低了系统的电容电阻分散率，使元件种类减少了一半，从而达到简化系统设计的目的.

关键词: 有源滤波器, 低通滤波器, 统计灵敏度, 参数简化

Abstract: Non-drift all-pole active low-pass filters are widely used for their non-drift characteristics. Based on the definition of statistic sensitivity and theory deduction, an optimum method is put forth for statistic sensitivity of the non-drift all-pole active low-pass filters. Their feasibility is proved by the low rank system model.It can be deduced that the system sensitivity is the lowest when all the β_i are equal to one. The decentralization rate of resistance and capacitance is lowered very much, and the number of the needed elements is reduced to the half of the formal ones, so as to realize the objects of system simplification.

Key words: active filter, low-pass filter, statistic sensitivity, parameter simplification

中图分类号:

TP202

洪晓芳,陈涤,吴世军 . 无漂移有源低通滤波器的统计灵敏度优化[J]. 山东大学学报(工学版), 2007, 37(4): 73-76 .

NG Xiao-fang,CHEN Di,WU Shi-jun

. Statistic sensitivity optimization of non-drift all-pole active low-pass filters[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2007, 37(4): 73-76 .

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