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Browse Journals & Magazines > Circuits and Systems II: Anal ...> Volume:50 Issue:8 Help

Design of continuous-time sigma-delta modulators with arbitrary feedback waveform

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1 Author(s)
Oliaei, O. ; Labs., Motorola Inc., Schaumburg, IL, USA

This paper considers the discretization of continuous-time sigma-delta modulators without any constraint on the shape or duration of the feedback signal. A motivation for taking the shape of the feedback signal into account is the system-level compensation of nonidealities encountered in a practical design. Two different discretization approaches based on state-variables and the modified z transform are presented. Explicit formulas for an exact mapping between continuous-time and discrete-time modulators are derived. Subsequently, design of multistage continuous-time modulators using arbitrary feedback waveforms is discussed.

Published in:
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on  (Volume:50 ,  Issue: 8 )

Date of Publication: Aug. 2003

Page(s):
437 - 444
ISSN :
1057-7130
INSPEC Accession Number:
7724588
Digital Object Identifier :
10.1109/TCSII.2003.814806
Product Type:
Journals & Magazines
Date of Current Version :
11 August 2003
Issue Date :
Aug. 2003
Sponsored by :
IEEE Circuits and Systems Society

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