High-quality factor asymmetric-slope band-pass filters: a fractional-order capacitor approach
High-quality factor asymmetric-slope band-pass filters: a fractional-order capacitor approach
- Author(s): P. Ahmadi ; B. Maundy ; A.S. Elwakil ; L. Belostotski
- DOI: 10.1049/iet-cds.2011.0239
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- Author(s): P. Ahmadi 1 ; B. Maundy 1 ; A.S. Elwakil 2 ; L. Belostotski 1
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View affiliations
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Affiliations:
1: Department of Electrical and Computer Engineering, University of Calgary, Calgary, Canada
2: Department of Electrical and Computer Engineering, University of Sharjah, United Arab Emirates
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Affiliations:
1: Department of Electrical and Computer Engineering, University of Calgary, Calgary, Canada
- Source:
Volume 6, Issue 3,
May 2012,
p.
187 – 197
DOI: 10.1049/iet-cds.2011.0239 , Print ISSN 1751-858X, Online ISSN 1751-8598
This study presents new techniques for implementing continuous-time second-order band-pass filters with high-quality factors and asymmetric slopes. The techniques are centred around the realisation of two non-conventional transfer functions which include the non-integer-order Laplacian operator sα; 0<α<1. Four main possible circuit realisations; one based on a frequency-dependent negative resistor (FDNR), another based on an inductor and two based on multiple amplifier biquads (MABs) are given and verified using Spice and experimentally for both transfer functions. In addition, a field programmable analogue array (FPAA) realisation is tested and verified. Last but not least, a possible realisation using current conveyors is also given, tested and verified.
Inspec keywords: continuous time filters; current conveyors; band-pass filters; capacitors; field programmable analogue arrays; Q-factor; biquadratic filters; transfer functions
Other keywords:
Subjects: Active filters and other active networks; Capacitors; Analogue processing circuits
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