基于CCTA的可级联的电流模式多功能滤波器

计算机工程与应用 ›› 2015, Vol. 51 ›› Issue (19): 231-235.

基于CCTA的可级联的电流模式多功能滤波器

周细凤1，曾荣周2，孙静1

1.湖南工程学院电气信息工程学院，湖南湘潭 411101
2.电子科技大学电子薄膜与集成器件国家重点实验室，成都 610054

出版日期:2015-09-30 发布日期:2015-10-13

Cascadable current-mode multifunction filter configuration using CCTA

ZHOU Xifeng1, ZENG Rongzhou2, SUN Jing1

1.College of Electrical & Information Engineering, Hunan Institute of Engineering, Xiangtan, Hunan 411101, China
2.The State Key Laboratory of Electronic Thin Films & Integrated Devices, University of Electronic Science & Technology of China, Chengdu 610054, China

Online:2015-09-30 Published:2015-10-13

摘要/Abstract

摘要： 通过级联积分器单元的方式，设计了一种基于电流传输跨导放大器（CCTA）的可级联的电流模式多功能高阶滤波结构。通过选择合适的输入电流，该结构能够同时实现低通、带通、高通和带阻等功能，其品质因素[Q]和角频率[ω0]都可以通过调整CCTA的偏置电流（[IB]）来实现电调谐。此[n]阶滤波器仅仅包含[n]个CCTA和[n]个接地电容，具有最少的有源和无源器件数目，电路结构简单，非常适合制作全集成IC。最后采用PSPICE仿真验证了所设计电路的性能。

关键词: [n]阶滤波器, 电流模式, 电流传输跨导放大器（CCTA）

Abstract: A cascadable current-mode multifunction filter using CCTA is proposed. By properly selecting the applied input currents；it can simultaneously realize low-pass, band-pass, all-pass, and high-pass and band-reject responses from one topology without any component matching conditions. Both of the parameter [ω0] and [Q] can be tuned electronically independently over a wide range by varying the bias current（[IB]） of the CCTA without affecting each other. Additionally, the proposed nth-order filter is only composed by [n] CCTAs and [n] grounded capacitors. So the configuration has the least number of passive and active components；the proposed configuration enjoys having simple structure, and it is highly suitable for IC implementation. The realized circuits are simulated with SPICE to exhibit its performance.

Key words: nth-order filter, Current Mode（CM）, Current Conveyor Transconductance Amplifier（CCTA）

周细凤1，曾荣周2，孙静1. 基于CCTA的可级联的电流模式多功能滤波器[J]. 计算机工程与应用, 2015, 51(19): 231-235.

ZHOU Xifeng1, ZENG Rongzhou2, SUN Jing1. Cascadable current-mode multifunction filter configuration using CCTA[J]. Computer Engineering and Applications, 2015, 51(19): 231-235.