DocumentCode
1377065
Title
Wideband cascade delta-sigma modulator with digital correction for finite amplifier gain effects
Author
Fischer, G. ; Davis, A.J.
Author_Institution
Dept. of Electron. & Comput. Eng., Rhode Island Univ., Kingston, RI, USA
Volume
34
Issue
6
fYear
1998
fDate
3/19/1998 12:00:00 AM
Firstpage
511
Lastpage
512
Abstract
The authors present an alternative approach to reducing the effects of finite amplifier open-loop gain in cascade delta-sigma modulators. The proposed gain compensation is carried out in the digital domain and thus requires no additional analogue circuitry. The method is illustrated by the example of a double third-order cascade circuit which, when properly compensated for finite gain effects, can yield 1-20 bit resolution with oversampling ratios as low as 16-24
Keywords
cascade networks; error compensation; modulators; sigma-delta modulation; digital correction; double third-order cascade circuit; finite amplifier gain effects; gain compensation; open-loop gain; oversampling ratios; wideband delta-sigma modulator;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19980405
Filename
674253
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