REDUCTION OF SYSTEMATIC ADC ERRORS BY OVERSAMPLING

P. Arpaia, P. Daponte, L. Michaeli, J.Šaliga

Abstract

Oversampling, successive noise shaping, and final low-pass filtering is a well-known approach to enhance dynamic range of analog-to-digital converters. However, the potential of this approach can be limited by systematic errors overriding the quantization error. The paper deals with the reduction of this limitation: an interpolating algorithm, based on a moving-average FIR filter with Bayesian coefficients is proposed, and its configuration inside some correction schemes are presented. Effectiveness, drawbacks, and the corresponding evaluation results of these schemes are discussed.

Keywords

oversampling, noise shaping, systematic error, ADC correction

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IMEKO-WC-2000-EWADC-P602.pdf

DOI

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