Patent ID: 8212706
Filing Date: 2012-07-03
Classification: H03M

Abstract:
1. A method comprising: receiving an analog input voltage; receiving a threshold from a plurality of thresholds; performing, at a comparator, a comparison of the analog input voltage with the received threshold; outputting a comparison decision based on the comparison of the analog input voltage with the received threshold; determining if the threshold should be adjusted based on the comparison; adjusting the threshold when it is determined the threshold should be adjusted; determining a time during a sample phase; freezing the threshold when the time is determined such that the threshold is not adjusted again until the sample phase ends, wherein before the time, the threshold was adjustable; determining a last comparison decision for the sample phase after the freezing of the threshold; and outputting an output value for the sample phase based on comparison decisions determined during the sample phase, wherein the output value is for converting the analog input voltage to a digital value.