摘要
讨论了用散射参数设计滤波器的优点,根据用散射参数表达的串联阻抗Ｚ和并联导纳Ｙ的二端口特性,给出了它们的有源ＲＣ电路模型。设计了一个用ＯＰＡ和ＲＣ元件组成的Ｎ阶滤波器电路,不必改变电路参数,能同时实现高通和低通滤波功能。
In the paper, the author discussed the advantages of the synthesizing method of active fitters using scattering parameters. Based on the scattering parameter expression of two port properties of impedance Z (in series connection) and admittance Y(in parallel connection) a kind of active RC model was presented. In application, a N-order active filter using OPA and RC was designed. The circuit can realize HP and LP functions simultaneously without changing the circuit topology. The designing method proposed in this paper has theretical and practical and practical values.
出处
《电子质量》
2002年第6期64-66,共3页
Electronics Quality
关键词
N阶有源滤波器
散射参数
导抗元件
scattering parameter: immittance: N-order active filter: lowpass: highpass
