Apparatus for converting analog to digital and pacemaking with digitally controlled comparator, Method for converting analog to digital with digitally controlled comparator

摘要

An analog to digital converting apparatus using a digital control comparator, a method thereof, and a pacemaker having the same are provided to reliably realize less power consumption by selectively operating the digital control comparators by bits. An analog to digital converting apparatus includes a plurality of digital control comparators(511~519), a digital to analog converter(520), and a successive approximation logic circuit(530). The digital control comparators sequentially generate bit values from an MSB(Most Significant Bit) by comparing input voltage(Vin) with reference voltages(Vref). The digital to analog converter generates the reference voltages applied to the comparators according to the generated bit values. The successive approximation logic circuit selects the comparator to generate the bit value of the adjacent bit according to the generated bit values, turns on the comparator, and performs a binary search.