Patent ID: 7477177
Filing Date: 2009-01-13
Classification: A61K,C07K,H03M

Abstract:
1. An A-D converter that outputs a digital output signal obtained by digitalizing an analog input signal, comprising: a plurality of comparators that each compare the analog input signal and an analog threshold value according to designated digital threshold data; a high-order field determining section that narrows down a data value corresponding to a high-order field of a predetermined bit number in the digital output signal based on a plurality of comparison results obtained by supplying threshold data different from one another to the plurality of comparators; a low-order field computing section that computes a plurality of candidate values for a data value corresponding to a low-order field of a predetermined bit number located at a side lower than the high-order field by means of the plurality of comparators; and a low-order field determining section that determines a data value corresponding to the low-order field based on the plurality of candidate values.