Volume 1 Number 3 (Aug. 2009)
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IJCEE 2009 Vol.1 (3): 307-310 ISSN: 1793-8163
DOI: 10.7763/IJCEE.2009.V1.48

Single CCTA–Based Universal Biquadratic Filters Employing Minimum Components

Norbert Herencsar, Jaroslav Koton, and Kamil Vrba

Abstract—In this paper a new second–order voltage– and current–mode universal biquadratic frequency filters using only single current conveyor transconductance amplifier (CCTA) and four passive elements are presented. The proposed voltage–mode universal filter has been transformed into current–mode universal filter using adjoint transformation method. Proposed circuits enables to realize the low–, band–, high–pass, band–stop and all–pass responses without changing the circuit topology and the possibility of independent control of the quality factor Q using single passive element. No component matching is required and all the passive and active sensitivities are low. PSPICE simulations and experimental results based on commercially available amplifiers OPA861 and MAX435 are included verify the theoretical conclusions of the proposed circuits.

Index Terms—Active filter, adjoint transformation, CCTA, current– and voltage–mode, universal biquadratic filter.

Norbert Herencsar, Jaroslav Koton, and Kamil Vrba are with the Department of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology, Purkynova 118,612 00 Brno, Czech Republic (phone: +420–541–149–190;fax: +420–541–149–192).

Cite: Norbert Herencsar, Jaroslav Koton, and Kamil Vrba, "Single CCTA–Based Universal Biquadratic Filters Employing Minimum Components," International Journal of Computer and Electrical Engineering vol. 1, no. 3, pp. 307-310, 2009.

General Information

ISSN: 1793-8163
Frequency: Quarterly
Editor-in-Chief: Prof. Yucong Duan
Abstracting/ Indexing: EI (INSPEC, IET), Ulrich's Periodicals Directory, Google Scholar, EBSCO, ProQuest, and Electronic Journals Library
E-mail: ijcee@iap.org

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