n阶有源C滤波器的综合

SYNTHESIS OF THE HIGH STAIR FILTER WITH ACTIVE CAPACITANCE

本文提出一种用有源器件（ＯＡ）和电容（Ｃ）组成几阶滤波器的一般方法，当ｎ为偶数时，可以同时实现高通，带通、低通三种特性。当ｎ为奇数时，可以同时实现高通、低通两种特性。文中以三阶滤波器为例，说明滤波器的综合方法。同时给出模拟电路模型。利用计算机仿真绘制了高通和低通两种滤波特性。

This paper presents a general method for using operational amplifier(OA)and capacitors(C)to form an n-th filter. High-pass,band-pass or low-passcharacteristics can be achieved,for even number n, and high-pass or low-pass canbe achieved,for odd number n. Taking triadic wavefilter as an example,thegeneral method for wavefilter synthesis is explained,By means of computer si-mulation, high-pass and low-pass characteristics are displaced graphically.Itdermonstrates the validity of this procedure.