A DAC Mismatch Calibration Technique for Multibit Sigma Delta Modulators
A technique for the calibration of DAC (digital to analog converter) mismatch errors in multi-bit Sigma Delta modulators (SDM) is presented. It consists of two parts: the first is a measurement technique to obtain the relative mismatch of each feedback DAC element. The second is a correction method applied to the modulator output to correct for the effect of DAC non linearity. The proposed technique works completely in the background. The paper presents a detailed analysis of the possible error sources affecting the accuracy of the calibration, as well as a comparison with other state of the art techniques. The technique is applied to a 3rd order SDM showing almost ideal characteristics after calibration.
WOS:000327392600045
2013
978-1-4799-0620-8
New York
4
REVIEWED
Event name | Event place | Event date |
Paris, FRANCE | JUN 16-19, 2013 | |