NDLI: Tuning elliptic filters with a ‘tuning biquad’

Content Provider	IEEE Xplore Digital Library
Author	Jurisic, D. Mijat, N. Moschytz, G.S.
Copyright Year	2009
Description	Author affiliation: School of Engineering, Bar-Ilan University, IL-52 900 Ramat-Gan, Israel (Moschytz, G.S.) \|\| Electronic Systems and Information Processing Dept., University of Zagreb, Unska 3, HR-10 000, Croatia (Jurisic, D.; Mijat, N.)
Abstract	This paper presents an optimum tuning procedure for high-order low-pass (LP) elliptic filters. Since elliptic filters are often used to satisfy very tight specifications, they often need to be tuned accurately. In this paper, we describe the tuning of one biquad, the ‘tuning biquad’, in a cascade of biquads. It is shown by Matlab simulations that the best choice for the tuning biquad consists of the pole pair with the highest pole Q (‘maximum-Q poles’) combined with the zero pair with the lowest frequency (‘minimum-frequency zeros’). We also show how standard tuning procedures, such as those for the Tow-Thomas biquad, lead to excellent results. As an example, the tuning procedure is performed on a normalized sevent-horder elliptic LP filter.
Starting Page	45
Ending Page	48
File Size	1225105
Page Count	4
File Format	PDF
ISBN	9781424438273
DOI	10.1109/ISCAS.2009.5117681
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-05-24
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Tuning Low pass filters Transfer functions Poles and zeros Cutoff frequency Resistors Information filtering Information filters Information processing Passive filters
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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