DocumentCode
26667
Title
Analytical Expressions for the Distortion of Asynchronous Sigma–Delta Modulators
Author
Babaie-Fishani, A. ; Van Keymeulen, B. ; Rombouts, P.
Author_Institution
Dept. Electron. & Inf. Syst., Ghent Univ., Ghent, Belgium
Volume
60
Issue
8
fYear
2013
fDate
Aug. 2013
Firstpage
472
Lastpage
476
Abstract
This brief investigates the commonly used asynchronous sigma-delta modulator, which consists of a Schmitt trigger and a continuous-time loop filter. A detailed analysis is presented to accurately predict the distortion of such modulators. The extracted expressions are compared with simulation results, and they illustrate an excellent match. The results are also compared with a previous work by Roza, and they show a drastic improvement in accuracy.
Keywords
continuous time filters; distortion; sigma-delta modulation; trigger circuits; ASDM; Schmitt trigger; asynchronous sigma-delta modulators; continuous-time loop filter; distortion; third-harmonic distortion; Equations; Frequency modulation; Harmonic analysis; Harmonic distortion; Mathematical model; Simulation; Asynchronous sigma–delta modulator (ASDM); pulsewidth modulator (PWM); third-order harmonic distortion;
fLanguage
English
Journal_Title
Circuits and Systems II: Express Briefs, IEEE Transactions on
Publisher
ieee
ISSN
1549-7747
Type
jour
DOI
10.1109/TCSII.2013.2268352
Filename
6553596
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