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New Method for Flat IIR Filter Design with Improved Group Delay

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2 Author(s)
Alfonso Fernandez-Vazquez ; Department of Electronics, Instituto Nacional de Astrofisica, Optica y Electronica, Puebla Mexico, P.O. Box 51 and 216, 72000. Tel/Fax: +52 222 2470517. afernan@inaoep.mx ; Gordana Jovanovic-Dolecek

This paper presents a new direct method for the design of IIR filters with flat magnitude response in both passband and stopband i.e. Butterworth type filters. The proposed filters have an improved group delay compared with the traditional Butterworth filter. The designed filters are obtained using only a causal part of the designed IIR filter with exactly linear phase. The design parameters are the same as in traditional IIR filter design based on analog filters i.e. passband and stopband frequencies omegap and omegas, and passband droop and stopband attenuation Ap and As, respectively

Published in:

2006 International Caribbean Conference on Devices, Circuits and Systems

Date of Conference:

26-28 April 2006