二阶节有源滤波器电路的相位调整法

The Phase Tuning Methods for Two-Amplifier Biquads

本文介绍一种利用示波器,对由双运放组成的有源滤波器的二阶节电路的零、极点进行准确调整的相位调试法。该方法可用于精确调整低通、高通、带通、低通陷波、高通陷波滤波器。与通常的幅度调整法相比,它具有更高的调整精度,简便易行。该方法也可以用于其它类型带通滤波器的调整。

In this paper the phase tuning methods by using oscilloscope for the tuning of the pole and zero of the two—amplifier biquads are given. The proposed methods can be used to tune lowpass, highpass, bandpass, lowpass notch and highpass notch filters. Compared with the amplitude tuning, this method is more accruate.