A note on the measurement method of the frequency response of a complex coefficient filter
A note on the measurement method of the frequency response of a complex coefficient filter
复制标题
复系数滤波器频率响应测量方法的注解
DOI：
10.1002/ecjc.1099
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Y. Ishibashi
中科院分区：
文献类型：
--
作者：
K. Shouno;Y. Ishibashi
通常，来自正交相位振荡器或相位差检测器的具有90°相位差的信号用于测量具有用于真实的部分和虚部分的两个输入端子的复系数滤波器的频率特性。然而，由于分相器是通过近似方法设计的，其输出信号的相位差存在误差。本文讨论了复系数滤波器频率特性测量中输入信号相位差对测量误差的影响。接下来，描述了两种新的方法，用于在不使用正交相位振荡器或相位分离器的情况下导出复系数滤波器的频率响应。所提出的方法可以通过向两个输入端子提供同相和异相信号或通过仅向其中一个端子提供信号而另一个端子接地来实现。最后，用该方法测量了复系数滤波器的频率响应，验证了该方法的有效性。© 2002 Scripta Technica，Electron Comm Jpn Pt 3，85（6）：32-41，2002
In general, signals with 90° phase difference from an orthogonal phase oscillator or a phase difference detector are used for measurement of the frequency characteristics of a complex coefficient filter with two input terminals for the real part and the imaginary part. However, since the phase splitter is designed by an approximate method, the phase difference of its output signal has an error. This paper describes the effect of the phase difference of the input signal on the error in the measurement of the frequency characteristics of a complex coefficient filter. Next, two new methods are described for deriving the frequency response of the complex coefficient filter without using an orthogonal phase oscillator or a phase splitter. The proposed method can be realized by providing the in-phase and out-of-phase signals to two input terminals or by providing the signal only to one of the terminals while the other is grounded. Finally, the frequency response of the complex coefficient filter is measured with the proposed method and its effectiveness is confirmed. © 2002 Scripta Technica, Electron Comm Jpn Pt 3, 85(6): 32–41, 2002