Compensation of Analog-to-Digital Converter Nonlinearities using Dither

Authors

  • Balázs Renczes
    Affiliation

    Budapest University of Technology and Economics

  • István Kollár
    Affiliation

    Budapest University of Technology and Economics

https://doi.org/10.3311/PPee.2145

Abstract

Analog-digital converters are inherently nonlinear. Conventional A/D conversion allows no real remedy afterwards. However, an alternative is to increase the available information by observing the transition instants, even with a conventional ADC. Performing the conversion with significant oversampling data points at threshold level crosses can be used. The values of these samples are precisely known, assuming histogram test was executed on the ADC beforehand. For almost constant signals having too few transition level crossings, dither is added. Interpolation is utilized to ensure uniformly sampled data points. This method reduces the conversion error considerably.

Keywords:

A/D conversion, nonlinearities, dither, oversampling, linearization, interpolation

Published Online

2013-08-30

How to Cite

Renczes, B., Kollár, I. “Compensation of Analog-to-Digital Converter Nonlinearities using Dither”, Periodica Polytechnica Electrical Engineering and Computer Science, 57(3), pp. 77–81, 2013. https://doi.org/10.3311/PPee.2145

Issue

Section

Articles