Patent ID: 9362937
Filing Date: 2016-06-07
CPC Classification: H03M

Claim Text:
1. A method of self-calibration of a successive approximation register-analog to digital (SAR-A/D) converter comprising an N-bit digital-to-analog converter for outputting an N-bit output code, the digital-to-analog converter comprising a first subconverter having a plurality (N Th ) of thermometer elements and a second subconverter having a plurality of binary-weighted elements N Bin , the output code defined by a thermometer scale having a number of levels equal to N Th , the method comprising: measuring, for each thermometer element of the plurality of thermometer elements, an error value; determining a mean value of the error values; dividing the plurality of thermometer elements into a first subset (X) and a second subset (Y), each containing an identical number of elements (x, y) equal to N generating the thermometer scale, wherein each level m generating the output code according to the thermometer scale.