Title :
Continuous Gain Calibration of Parallel Delta Sigma A/D Converters
Author :
Alma Delic-Ibukic;Donald M. Hummels
Author_Institution :
Department of Electrical and Computer Engineering, University of Maine, 5708 Barrows Hall, Orono, ME 04469-5708, USA
fDate :
4/1/2006 12:00:00 AM
Abstract :
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
Keywords :
"Calibration","Bandwidth","Error correction","Linearity","Redundancy","Delta modulation","Pipelines","CMOS technology","Instrumentation and measurement","Computer errors"
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2006. IMTC 2006. Proceedings of the IEEE
Print_ISBN :
0-7803-9359-7
DOI :
10.1109/IMTC.2006.328244
