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Active and Passive Electronic Components
Volume 2010, Article ID 785631, 5 pages
http://dx.doi.org/10.1155/2010/785631
Research Article

Voltage/Current-Mode Multifunction Filters Using Current-Feedback Amplifiers and Grounded Capacitors

Department of Electronic Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan

Received 17 October 2009; Revised 15 April 2010; Accepted 16 April 2010

Academic Editor: Ashok Goel

Copyright © 2010 Jiun Wei Horng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

One configuration for realizing voltage-mode multifunction filters and another configuration for realizing current-mode multifunction filters each using two current-feedback amplifiers (CFAs) are presented. The proposed voltage-mode circuit exhibits simultaneously lowpass, bandpass, and highpass filters. The proposed current-mode circuit also exhibits simultaneously lowpass, bandpass, and highpass filters. The proposed circuits offer the following features: no requirements for component matching conditions, low active and passive sensitivities, employing only grounded capacitors, and the ability to obtain multi-function filters from the same circuit configuration.