LSB Dithering in MASH Delta–Sigma D/A Converters

Author

Pamarti, Sudhakar ; Galton, Ian

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA

Volume

54

Issue

4

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

779

Lastpage

790

Abstract

Theoretical sufficient conditions are presented that ensure that the quantization noise from every constituent digital delta-sigma (DeltaSigma) modulator in a multistage digital DeltaSigma modulator is asymptotically white and uncorrelated with the input. The conditions also determine if spectral shape can be imparted to the dither´s contribution to the power spectral density of the multistage digital DeltaSigma modulator´s output. A large class of popular multistage digital DeltaSigma modulators that satisfy the conditions are identified and tabulated for easy reference

Keywords

delta-sigma modulation; quantisation (signal); LSB dithering; MASH; delta-sigma D/A converters; dither techniques; multistage digital delta-sigma modulator; power spectral density; quantization noise; Art; Delta modulation; Digital modulation; Frequency; Multi-stage noise shaping; Noise cancellation; Noise shaping; Quantization; Random sequences; Sufficient conditions; Delta–sigma ($Delta Sigma$) modulation; MASH; dither techniques; quantization;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2006.888780

Filename

4155045