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
- Patent Title: Correction of static mismatch errors in a D/A converter
- Patent Title (中): D / A-Umwandlern的Korrektur von statischen Fehlern durch Fehlanpassung
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Application No.: EP05022150.6Application Date: 2005-10-11
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Publication No.: EP1775838A1Publication Date: 2007-04-18
- Inventor: Rudberg, Mikael , Eklund, Jan-Erik
- Applicant: Infineon Technologies AG
- Applicant Address: St.-Martin-Strasse 53 81669 München DE
- Assignee: Infineon Technologies AG
- Current Assignee: Infineon Technologies AG
- Current Assignee Address: St.-Martin-Strasse 53 81669 München DE
- Agency: Patentanwälte Lambsdorff & Lange
- Main IPC: H03M1/10
- IPC: H03M1/10 ; H03M1/66
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.
Public/Granted literature
- EP1775838B9 Correction of static mismatch errors in a D/A converter Public/Granted day:2010-03-03
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