Method of calibrating a SAR A/D converter and SAR-A/D converter implementing said method
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United States of America Patent
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Jun 7, 2016
Grant Date -
May 26, 2016
app pub date -
Aug 25, 2015
filing date -
Aug 25, 2015
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Abstract
The present disclosure relates to a method of self-calibration of a successive approximation register-analog-to-digital converter. The method includes measuring an error value for each thermometer element of a plurality of thermometer elements and determining a mean value of measured error values. The method also includes generating a thermometer scale where each level of the thermometer scale will be an incremental sum of each value of a first subset, and each further level of the thermometer scale will be a sum of all values of a second subset plus the incremental sum of the elements of the first subset in any order. In addition, the method includes generating the output code according to the thermometer scale.
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