High-quality factor asymmetric-slope band-pass filters: A fractional-order capacitor approach

Author

Ahmadi, Pouyan ; Maundy, Brent ; Elwakil, Ahmed S. ; Belostotski, Leonid

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Calgary, Calgary, AB, Canada

Volume

6

Issue

3

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

187

Lastpage

197

Abstract

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 s^α; 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.

Keywords

Q-factor; band-pass filters; biquadratic filters; capacitors; continuous time filters; current conveyors; field programmable analogue arrays; transfer functions; FDNR; FPAA realisation; MAB; Spice; continuous-time second-order band-pass filters; current conveyors; field programmable analogue array; fractional-order capacitor approach; frequency-dependent negative resistor; high-quality factor asymmetric-slope band-pass filters; inductor; multiple amplifier biquads; nonconventional transfer functions; noninteger-order Laplacian operator;

fLanguage

English

Journal_Title

Circuits, Devices & Systems, IET

Publisher

iet

ISSN

1751-858X

Type

jour

DOI

10.1049/iet-cds.2011.0239

Filename

6226934