| 摘要 |
A plurality of reference voltages are generated by a reference voltage generation circuit. A plurality of comparators is supplied respectively with an analog input voltage and any two reference voltages out of the plurality of reference voltages. A threshold voltage of each of the comparators is adjusted according to the two reference voltages. Each of the comparators compares the analog input voltage with the threshold voltage. A plurality of comparison output signals of the plurality of comparators are supplied to an encoder circuit, and digital signals which correspond to the plurality of comparison output signals are output.
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