Patent ID: 7757147
Filing Date: 2010-07-13
Classification: G01R

Abstract:
1. A method for allowing measurement corrections on a chip by chip basis, comprising the steps of: applying a reference value to each input on an integrated circuit chip; measuring an output value responsive to the reference value at each output of the integrated circuit chip; generating an offset error value for each output of the integrated circuit chip by determining a difference between an analog equivalent of the output value and the reference value for each of the outputs of the integrated circuit chip; applying an input value comprising a reduced percentage of full scale to each of the inputs of the integrated circuit chip; measuring a second output value responsive to the input value at each of the outputs of the integrated circuit chip; generating a gain error value for each of the outputs of the integrated circuit chip by subtracting the offset error from the second output value and dividing by the input value for each of the outputs of the integrated circuit chip; storing the offset error and the gain error in an error correction table within a non-volatile memory of the integrated circuit chip.