CDTAs Based Current-Mode Universal Biquad Filters with Orthogonal Control of Quality Factor and Pole Frequency

Abstract:

This article presents current-mode universal biquad filters based on CDTAs. The filter circuits using four CDTAs and two grounded capacitors which are able to provide low-pass, high-pass, band-pass, band-reject and all-pass functions. The pole frequency can be orthogonally controlled from quality factor and the circuits have high output impedance appropriate for cascade connection application in current mode which is capable to directly drive load. This qualification is very appropriate for further development into an integrated circuit. The results of PSPICE simulation program are corresponding to the theoretical analysis.

• Periodical: Advanced Materials Research (Volume 787)
• Pages: 501-507
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.787.501
• Online since: September 2013
• Authors: Saksit Summart, Chanchai Thongsopa
• Keywords: Biquad Filter, Current-Mode, High Output Impedance, Orthogonal Control

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