Invention Publication
EP1775838A1 Correction of static mismatch errors in a D/A converter 有权
D / A-Umwandlern的Korrektur von statischen Fehlern durch Fehlanpassung

Correction of static mismatch errors in a D/A converter
Abstract:
The present invention relates to a method and device for the correction of static mismatch errors in a D/A converter, where an input word, being the digital representation of an analogue input signal, is divided into one most significant part, a msb-word, and one least significant part, a lsb-word, and where said msb-word is represented by msb-bits and said lsb-word is represented by lsb-bits. The present invention teaches that the correction is performed by setting the effective weight of the least significant msb-bit to be less than the total sum of all lsb-bits, implementing a first look up table, LUT1, containing the most significant part of the error, so that a corrected msb-word, c-msb-word, would be equal to the msb-word plus a value in LUT1 representing the msb-word, and implementing a second look up table, LUT2, containing the least significant part of the error, so that a first corrected output, c1-output, would be equal to c-msb-word plus a value in LUT2 representing the c-msb-word added to the 1sb-word.
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