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用数字电路得到多路相控信号是十分方便的.但是数字电路只能产生方波信号.在某些需要多路正弦相控信号的场合,通常是用滤波器来取出基频信号.但是通常的滤波器产生彼此不同的附加相移. 本文给出了一个用Bessel滤波器取得多路正弦相控信号的方法,并使其产生的附加相移误差限于工程上许可的范围之内.(在我们的情况下|△φ|≤3°) 实验结果和理论分析相符.
It is very convenient to get multiphase signal by digital circuit, but the digital circuit can only produce square wave signal.When some require multiple sinusoidal phase control signals, filter is usually used to get the fundamental frequency signal, but usually Of the filter produces additional phase shifts that are different from each other.This paper presents a method to obtain multiple sinusoidal phase-controlled signals using a Bessel filter and to limit the additional phase-shift errors it produces to within the permissible range of engineering In our case | △ φ | ≤3 °) The experimental results agree well with the theoretical analysis.