Functionality of quantization noise in sigma-delta modulators

Author

Kerama, M.

Author_Institution

Dept. of Electr. & Comput. Eng., Connecticut Univ., Storrs, CT, USA

Volume

2

fYear

2000

fDate

2000

Firstpage

912

Abstract

In this paper, the behavior of sigma-delta based on the quantization noise is presented. A one-bit quantizer, which is the worst case, is considered. The sigma-delta modulator tries to send information through a comparator, which is heavily nonlinear. It is shown that information is transferred through the nonlinear static component by making use of a strong dither signal. The stability and quality of the sigma-delta modulator depends on the quality of the dither signal. The behavior of the second-order continuous-time sigma-delta is predicted based on the proposed method of study

Keywords

circuit noise; circuit stability; comparators (circuits); continuous time systems; quantisation (signal); sigma-delta modulation; 1 bit; dither signal; dither signal. quality; heavily nonlinear comparator; information transfer; nonlinear static component; quantization noise; quantization noise functionality; second-order continuous-time sigma-delta modulator; sigma-delta modulator quality; sigma-delta modulator stability; sigma-delta modulators; Bandwidth; Circuit noise; Delta-sigma modulation; Filters; Frequency; Linearity; Noise shaping; Quantization; Signal to noise ratio; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2000. Proceedings of the 43rd IEEE Midwest Symposium on

Conference_Location

Lansing, MI

Print_ISBN

0-7803-6475-9

Type

conf

DOI

10.1109/MWSCAS.2000.952902

Filename

952902