Current-mode biquadratic filter using DO-CCCDBAs

Authors:
Montree Siripruchyanun;Winai Jaikla
Affiliations:
Department of Teacher Training in Electrical Engineering, Faculty of Technical Education, King Mongkut's University of Technology North Bangkok, Bangkok 10800, Thailand;Electric and Electronic Program, Faculty of Industrial Technology, Suan Sunandha Rajabhat University, Dusit, Bangkok 10300, Thailand
Venue:
International Journal of Circuit Theory and Applications
Year:
2010

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Abstract

This paper presents a current-mode universal biquadratic filter performing three functions; low pass, high pass and band pass, based on dual-output current-controlled current differencing buffered amplifiers (DO-CCCDBAs). The features of the circuit are that the quality factor and pole frequency can be tuned independently via the input bias currents; the circuit description is very simple, consisting of merely three DO-CCCDBAs and two grounded capacitors. Without any external resistors that require component matching conditions and using only grounded elements, the proposed circuit is very appropriate to further develop into an integrated circuit. The PSPICE simulation results are depicted. The given results agree well with the theoretical anticipation. Copyright © 2008 John Wiley & Sons, Ltd.