| 摘要 |
The A/D converter includes a D/A converter which generates a reference voltage, a comparator which compares a sampled analog input voltage with the reference voltage, and a sequential comparator control circuit which repeats the comparison steps that input a digital value into the D/A converter in accordance with the result of the determination by the comparator to obtain the result of the conversion. The sequential comparator control circuit inputs an initial digital value to the D/A converter so that a reference voltage larger than one half of a max. allowable value of the analog input is supplied to the comparator at the time the A/D conversion commences. |
