Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/91497
Title: A pole sharing technique for linear phase switched-capacitor filter banks
Authors: Chang, Joseph Sylvester
Tong, Yit Chow
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 1990
Source: Chang, J. S., & Tong, Y. C. (1990). A pole sharing technique for linear phase switched-capacitor filter banks. IEEE Transactions on Circuits and Systems, 37(12), 1465-1479.
Series/Report no.: IEEE transactions on circuits and systems
Abstract: A switched-capacitor pole sharing technique for implementing bandpass filter banks is proposed. Using this technique, hardware reduction is achieved in two ways. First, the efficient nonminimum phase Lerner filter approximation is employed to minimize the number of poles required to satisfy a given filter specification in frequency and time domains; this approximation is more efficient than the common minimum phase filter approximations used in many reported filter bank designs. Second, the number of poles is reduced by pole sharing where an n-pole pair per channel bandpass filter bank is realized with only (n - 2) additional pole pairs per channel after the first channel, hence a saving of two pole pairs per channel. In the case of a four-pole pair (eighth order) per channel 25 channel filter bank example discussed in this paper, the number of poles saved is nearly 50%. The proposed hardware reduction methodology is micropower compatible, and is achieved without placing extra demands on the speed of operational amplifiers employed and without resorting to complicated clocking strategies; only a biphasic clock is used. Phase reversal for vocoder applications is easily achieved without incurring any additional hardware or compromising desirable features of the filter bank realization. Single parameter and statistical multiparameter sensitivity analyses are derived. The multiparameter sensitivity for the filter realized as a summation (parallel) of biquadratic sections is compared against the cascade structure. A uniformly and nonuniformly spaced filter bank were simulated with SWITCAP and part of the uniformly spaced filter bank was constructed on a breadboard. The near linear phase in the passband and sharp attenuation in the stopband responses obtained agreed with filter specifications.
URI: https://hdl.handle.net/10356/91497
http://hdl.handle.net/10220/4640
ISSN: 0098-4094
DOI: http://dx.doi.org/10.1109/31.101267
Rights: © 1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. http://www.ieee.org/portal/site.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

Files in This Item:
File Description SizeFormat 
A Pole Sharing Technique for Linear Phase Switched Capacitor Filter Bank.pdfPublished version1.12 MBAdobe PDFThumbnail
View/Open

Google ScholarTM

Check

Altmetric

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.