NON-LINEAR MODEL BASED CALIBRATION OF D/A CONVERTERS

Balázs Vargha, Johan Schoukens, Yves Rolain

Abstract

Various error sources cause linearity errors which degrade the performance of D/A converters. The paper presents a non-linear model to describe multiplying D/A converters. A Walsh transformation based diagnostic tool is used to determine the model parameters. Based on this model, a calibration scheme is derived, in order to compensate the non-linear behaviour of the converter. Practical applicability of the proposed method is shown by measurements performed on a custom designed test circuit.

Keywords

bit intermodulation, calibration of converters, digital-to-analog conversion, testing data converters, Walsh transformation

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IMEKO-TC4-2001-014.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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