Tone behavior of the double loop ΣΔ modulator with unstable filter dynamics

Author

Motamed, Mariam ; Sanders, Seth ; Zakhor, Avideh

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA

fYear

1994

fDate

2-5 Oct 1994

Firstpage

37

Lastpage

40

Abstract

In this paper we analyze the tone behavior of the double loop ΣΔ modulator with unstable filter dynamics. We show that some unstable limit cycles have an attractor region in their neighborhood which results in tones in the spectrum corresponding to the fundamental or harmonics of these limit cycles. We develop the tools to determine whether or not an unstable limit cycle has an attractor in its neighborhood and obtain a method to approximate the boundaries of these attractors. We then propose a novel ΣΔ structure for tone removal

Keywords

filtering theory; harmonics; limit cycles; sigma-delta modulation; approximation; attractor region; boundaries; double loop ΣΔ modulator; fundamental; harmonics; tone behavior; tone removal; unstable filter dynamics; unstable limit cycles; Analytical models; Delay; Delta modulation; Delta-sigma modulation; Electronic mail; Filtering; Limit-cycles; MATLAB; Power harmonic filters; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Digital Signal Processing Workshop, 1994., 1994 Sixth IEEE

Conference_Location

Yosemite National Park, CA

Print_ISBN

0-7803-1948-6

Type

conf

DOI

10.1109/DSP.1994.379879

Filename

379879