任意阶无漂移全极点有源低通滤波器的原理与实现

The Principle and Realization of Non-drift All-pole Active Low-pass Filters

本文提出了一种有源低通滤波器的无漂移基本节电路，并将它推广到任意阶无漂移全极点有源低通滤波器的实现，给出了一般的电路结构，系统的设计方法和工程实验结果。这种滤波器具有良好的低漂移，低元件灵敏度特性，具有实际的工程应用价值。

In this paper a new concept of non-drift active filter is proposed. The principle,clrcuit structure,design formulas and experiment results of n-th-order non-drift all-pole active low-pass filters are Introduced in detail. The filter has not DC drift at all. It features simplicity in structure,easiness for design and fine performance,suitable for obtaining high-sensitivity and low DC drift in high--precision measuring systems.