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Active and Passive Electronic Components
Volume 2011 (2011), Article ID 391642, 7 pages
http://dx.doi.org/10.1155/2011/391642
Research Article

Current Mode Biquad Filter with Minimum Component Count

Department of Electronics Engineering, Z. H. College of Engineering and Technology, AMU, Aligarh 202 002, India

Received 26 January 2011; Accepted 28 April 2011

Academic Editor: I. A. Khan

Copyright © 2011 Bhartendu Chaturvedi and Sudhanshu Maheshwari. 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

The paper presents a new current mode biquadratic filter with one input and three outputs using differential voltage current conveyor (DVCC) and four passive components. The proposed circuit can simultaneously realize low-pass, band-pass, and high-pass filter functions without changing the circuit topology and passive elements. The circuit exhibits a good frequency performance and low-sensitivity figures. PSPICE simulation using 0.5 μm CMOS parameters are given to validate the proposed circuit. The circuit provides a simple yet novel solution to the current-mode filtering after appropriate incorporation of current sensing elements in form of current buffers.