FORMAL DEFINITION AND PROPERTIES OF FEB-BASED ENOB OF INTELLIGENT CYCLIC ADC
Journal Title: Metrology and Measurement Systems - Year 2008, Vol 15, Issue 3
Abstract
The paper presents a new approach to the measurement of effective resolution (effective number of bits - ENOB) of the cyclic A/D converters (CADCs). The core idea of the approach is a direct measurement of ENOB using, as a numerical measure, the number of true bits before the first erroneous bit (FEB) in the code of the sample. The position of FEB is determined by the first non-zero bit in the binary presentation of the conversion error. The FEB-based definition of ENOB is introduced and discussed. The results of simulation evaluations of FEB distributions in sequential cycles of conversion are presented and values of FEB-based ENOB are compared with the conventional ENOB evaluations. The influence of DNL and INL errors of internal A/D converter on directly and conventionally measured values of ENOB is analysed. The proposed method of ENOB measurement is less dependent on the class of the testing signal and can be used for more adequate assessment of actual ADC resolution.
Authors and Affiliations
ANATOLIY PLATONOV, ŁUKASZ MAŁKIEWICZ, KONRAD JĘDRZEJEWSKI
Keywords
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