TIME-VARYING BUTTERWORTH FILTERS WITH COMPENSATED GROUP DELAY

Roman Kaszynski, Jacek Piskorowski

Abstract

This paper presents the concept of time-varying Butterworth filters with linear phase response. The compensation of the phase characteristics is carried out with the aid of the phase shifter system. The paper shows that it is possible to shorten the transient state in low-pass phasecompensated analog filters by varying in time selected parameters. This paper contains simulation results of the proposed filters and comparison with the classic circuits.

Keywords

Butterworth filters, time-varying systems, group delay compensation

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PWC-2006-TC4-012u.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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