基于MOCCCⅡ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 MOCCCⅡ 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：《现代电子技术》2009年第9期168-171,共4页Modern Electronics Technique

基　　金：863专题课题(2007AA12Z332)资助项目

摘　　要：提出一种结构简单的新型多功能有源滤波器。该电路由两个MOCCCⅡ,一个OTA和两个接地电容组成。通过选择不同的输入和输出端口,能够实现低通、高通、带通、带阻、全通五个滤波功能。调整MOCCCⅡ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,结果表明提出的电路方案正确有效。Realization of a simple muhifunctional active filter is presented. The circuit is constructed with two Multiple Current Output CCC Ⅱ s（MOCCC Ⅱ ）, one Operationgal Transconductance Amplifier（OTA） and two grounded capacitors. The biquad can realize low - pass,high - pass, band - pass, band - stop and all - pass filter characteristics by choosing approprate current input and output branches. The characteristic parameters can also be tuned by adjusting the bias currents and the capacitors. As well as the tunable frequency,the proposed circuit has very low sensitivities with respect to the circuit elements. PSpice simulation for an actual circuit is conducted,and the results show that the proposed circuit is 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]