电流模式多功能二阶滤波器

A Current Mode Second Order Filter With Multifunctions

提出了用改进的电流传送器实现电流模式二阶滤波器的通用电路，该通用电路在不同的输出端上获得了二阶带通、低通、高通、陷波滤波等多滤波功能。电路的品质因素Ｑｐ和截止频率ωｐ独立可调，理论分析和计算机仿真表明电路是可行的、正确的。

A universal circuit is proposed in the paper,which realizes current mode second order filter by using a modified current conveyor. Various filtering functions, such as second order bandpass,low pass,high pass and notch filtering,are obtainable at different output of the circuit. The quality factor, Q p,and the cut off frequency, ω p,of the circuit are seperately adjustable. Both theoretical analysis and computer simulation indicate a low passive sensitivity for the circuit.