Compensation of Analog-to-Digital Converter Nonlinearities using Dither

  • Balázs Renczes Budapest University of Technology and Economics
  • István Kollár Budapest University of Technology and Economics

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 in Onlinefirst
30-08-2013
How to Cite
RENCZES, Balázs; KOLLÁR, István. Compensation of Analog-to-Digital Converter Nonlinearities using Dither. Periodica Polytechnica Electrical Engineering and Computer Science, [S.l.], v. 57, n. 3, p. 77-81, 2013. ISSN 2064-5279. Available at: <https://pp.bme.hu/eecs/article/view/2145>. Date accessed: 18 jan. 2018. doi: https://doi.org/10.3311/PPee.2145.
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Articles