双二阶有源滤波器的动态误差

THE TREND ERROR OF BIQUAD ACTIVE FILTER

双二阶有源带通滤波器稳定可靠，具有很高的Ｑ值，是一阶或多阶网络构成的一级有源滤波器无法达到的，是各种有源滤波器中性能较好的一种。本文分析这种滤波器的基本原理，并导出运放动态误差对该滤波器的增益Ｇ。

The biquad active band filters with high Q factor is very stable and dependable Its function is well than all other kinds of the active band filters The paper analyses the basic princples of the filter, and that lead to the formula of operation of amplifier's trend errors impairing G(the Gain of the filters) and B(the Band Width of the filters)