采样数据滤波器设计方法综述

A Summary of Sampled-Data Filter Design

本文对开关电容滤波器和开关电流滤波器的设计方法作了综述。通过实例,提出了由LC滤波器原型电路到有源RC滤波器。再到开关电容滤波器的设计方法,并应用相互互易网络原理和信号流留转置方法,提出了由开关电容滤波器设计开关电流滤波器的方法,由于LC滤波器的设计有表册可查,据此可以很方便地设计出具有各种性能指标的开关电流滤波器。

This paper summarizes the switched capacitor filter and switched current filter design methods. A new design method is proposed: starting from LC filter prototype circuit to active RC filter circuit and then to switched capacitor filter. By applying inter-reciprocity network theorem and signal flow graphic transposition, the authors have created another new design method: from switched capacitor filter to switched current fiIter. As manuals are available for the design of LC filters, it is much easier to design switched current filters with various performances in this way.