一种新型通用有源电流模式滤波器的设计

Design of a New Universal Active Current Mode Filter

在建立了MOS场效应管小信号模型的基础上,采用信号流图的方法设计了一个三输入一输出的二阶通用有源电流模式滤波器。该滤波器能够通过合理的选择输入电流实现不同的滤波功能,并可通过改变滤波器电路的工作条件来实现不同参数的滤波。推导出这种结构的滤波器具有低灵敏度的特性,总结了这种结构的滤波器的优缺点。

By signal flow graph, a new universal active current mode second-order filter was designed basis on establishing MOS transistor small-signal model. The filter is of three-input and one-output. It can perform different functions by selecting rational input current or work conditions. Its sensitivity is lower. The advantages and disadvantages of the filter is summarized.