Measurement and compensation of digital-to-analog converter nonlinearity

A novel method of finding digital-to-analog converters (DACs) input sequences to produce high-fidelity output waveforms is presented. Error produced by a nonideal DAC is represented by its spectral components. Successive power spectrum measurements are used to solve for the unknown amplitude and pha...

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Bibliographic Details
Published inMeasurement : journal of the International Measurement Confederation Vol. 31; no. 3; pp. 175 - 186
Main Authors Friel, G.A, Hummels, D.M, Irons, F.H
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.04.2002
Subjects
DAC compensation linearization
DAC compensation linearization
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Summary:A novel method of finding digital-to-analog converters (DACs) input sequences to produce high-fidelity output waveforms is presented. Error produced by a nonideal DAC is represented by its spectral components. Successive power spectrum measurements are used to solve for the unknown amplitude and phase of compensation signals applied to the DAC input. This iterative technique has produced waveforms that have a 35-dB reduction in harmonic distortion. This iterative method of finding error can also be used to develop dynamic models of the error introduced by the DAC based on current and previous DAC input codes. These models can predict and correct errors produced from an arbitrary input sequence. An evaluation of this technique is done using a commercially available 12-bit DAC.
ISSN:0263-2241
1873-412X
DOI:10.1016/S0263-2241(01)00030-6