Continuous Gain Calibration of Parallel Delta Sigma A/D Converters

A method to correct for gain errors in each channel of a parallel delta-sigma (PiDeltaSigma) converters in real-time is presented. The calibration technique requires an additional channel that is linearly dependant on PiDeltaSigma channels used. By introducing the redundancy in a system, the adaptiv...

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Bibliographic Details
Published in2006 IEEE Instrumentation and Measurement Technology Conference Proceedings pp. 905 - 909
Main Authors Delic-Ibukic, A., Hummels, D.M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.04.2006
Subjects
Bandwidth
Calibration
CMOS technology
Computer errors
Delta modulation
Error correction
gain correction
Instrumentation and measurement
Linearity
parallel delta sigma converters
Pipelines
Redundancy
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Summary:A method to correct for gain errors in each channel of a parallel delta-sigma (PiDeltaSigma) converters in real-time is presented. The calibration technique requires an additional channel that is linearly dependant on PiDeltaSigma channels used. By introducing the redundancy in a system, the adaptive LMS algorithm can be used to correct for gain errors within the channels. Using a 16-channel PiDeltaSigma converter with 4th order delta-sigma modulators and oversampling rate of 6, the simulation results show a 90 dB reduction in unwanted tones caused by 1% gain mismatch
ISBN:9780780393592
0780393597
ISSN:1091-5281
DOI:10.1109/IMTC.2006.328244