通用二阶有源R滤波器的构成与分析

Constitution and Analysis of Second-order Active R Filter Circuit

本文新提出了一种构成有源R滤波器的电路,该滤波器只有电阻和运算放大器,由于没有电抗元件而便于集成。它适用于中Q或低Q的情况,更宜于频率高的场合。对所有无源和有源元件而言,它的灵敏度低,电路的稳定性很高。

A new circuit of active R filter is presented in the paper, which employs only resistors and operational amplifiers. The reatance elements in circuit have been eliminated, then it can be integrated. It is suitable for medium or low Q, even when high frequency is applied. It has very low sesitivities with respect to all passive and active paramemeters, the stability of circuit is very high.