基于CCCⅡ±和OTA的频率可调谐多功能电流模式滤波器  

Frequency tunable universal current-mode filter based on CCCⅡ± and OTA

作　　者：陈瑛[1] 江金光[1] 

机构地区：[1]武汉大学卫星导航定位技术研究中心,湖北武汉430079

出　　处：《湖北大学学报（自然科学版）》2009年第3期264-268,共5页Journal of Hubei University：Natural Science

基　　金：863专题课题(2007AA12Z332)资助

摘　　要：提出一种结构简单的新型多功能有源滤波器.该电路由2个CCCⅡ±,1个OTA和2个接地电容组成,只需1个输入端,选择不同的输出端口,能够实现低通、高通、带通、带阻、全通5个滤波功能.调整CCCⅡ±以及OTA的偏置电流和电容值,能够改变特征参数,设计的电路频率可调谐并且具有很低的灵敏度.最后对实际电路,进行了PSpice仿真,结果表明所提出的电路方案正确有效.A simple multifunctional active filter was presented, whose circuit was constructed with two dual current output CCCⅡs （CCCⅡ±）, one operational transconductance amplifier （OTA） and two grounded capacitors. The biquad with only one input could realize low-pass, high-pass, band-pass, band-stop and all-pass filter characteristics by choosing appropriate current output branches. The characteristic parameters also could be tuned by adjusting the bias currents and the capacitors. As well as the tunable frequency,the proposed circuit enjoyed elements. Finally spice simulation for an actual circuit very low sensitivities with respect to the circuit was conducted, and the results showed that the proposed circuit was valid and effective.

关 键 词：电流模式 频率可调谐 滤波器 电流控制传送器(CCCⅡ) 运算跨导放大器(OTA) 

分 类 号：TN713[电子电信—电路与系统]