A Method to Reduce Influence of Gain Errors and Offsets of Internal Components on Performance of Adaptive Sub-ranging ADCs

Łukasz Małkiewicz, Konrad Jędrzejewski

Abstract

The paper proposes a method of designing and calibrating of an adaptive sub-ranging ADC that is robust to both gain errors and offsets of the components of its analog part, which may simplify and reduce the costs of manufacturing of adaptive ADCs. For facilitation of postproduction calibration, we propose a method of measurement of the actual gain and offset of particular analog tracts used in subsequent stages of conversion, that utilizes the subADC already present in the analog part of the adaptive ADC. Efficiency of the proposed approach is discussed and evaluated on the basis of the results of simulation experiments.

Keywords

sub-ranging ADC, adaptive ADC, calibration, gain and offset estimation

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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