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ThinkMind // ICWMC 2013, The Ninth International Conference on Wireless and Mobile Communications // View article icwmc_2013_5_10_20005


A New Approach for Multistage Analog Complex Filter Design

Authors:
Daniele Grasso
Giuseppe Avellone

Keywords: gm-C filter, complex filtering, low-IF receivers

Abstract:
In this paper, a design approach for gm-C complex filter for intermediate frequency (IF) is formalized. It is based on decoupled first order gm-C sections, each one centered at a different frequency with respect to the others that can be stacked in series to get the final band pass filter response, with order equal to the number of stages. A simple case with two stages is presented to show selectivity improvement when difference between the two center-bands increase, with ripple increase as drawback. An optimal setup with good selectivity increment and still zero ripple (flat pass-band) is also shown. Then, the approach is extended to third order. The approach has been used for IF filtering in STMicroelectronics GNSS receivers, but it is applicable to other wireless receivers.

Pages: 76 to 81

Copyright: Copyright (c) IARIA, 2013

Publication date: July 21, 2013

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-284-4

Location: Nice, France

Dates: from July 21, 2013 to July 26, 2013

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