高阶电流模式有源滤波器设计

RESEARCH ON THE DESIGN OF HIGH ORDER CURRENT-MODE ACTIVE FILTER

说明了从电压模式电路推导出电流模式有源滤波器二阶节电路的方法 ,然后用级联法设计高阶的电流模式有源滤波器 ,其中主要解决了三个问题 :零 -极点配对问题 ;级联顺序和增益常数分配 .最后给出了一个示例来说明设计过程 .计算机模拟验证了设计的正确性 .

In this paper the second order current-mode active filter circuits conducted from voltage-mode active filters are introduced,and then the high-order current-mode filter design method based on these biquads is given.In the high order filter design,the problems of zero-pole pairing,the cascade ordering and the gain constant distribution are considered.A design example is given,and the result is verified by computer simulation.