Comparison of algorithms for computing inl from sinewave histogram

Abstract

Computing the Integral Nonlinearity (INL) of an ADC from the histogram of output codes for a sine wave input is investigated. Two algorithms are compared: one based on a proposal by Doernberg et al. [1] and another based on a proposal by van Bossche et al. [2]. Doernberg's algorithm has evolved into a quasi industry standard [3] while van Bossche's algorithm has been standardized by the IEEE [4]. Simulating the test method of sinewave histogramming for a perfectly linear ADC, both computation algorithms yield comparable results; in the presence of ADC nonlinearities results, however, they differ. This questions the suitability of the two algorithms for the purposes of testing the worst-case non-linearity specifications for ADCs.

Publication Title

IET Conference Publications

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