Patent ID: 9584149
Date: 2017-02-28
CPC Classifications: H03K,H03M,H04W

Claim:
1. A comparator comprising: a first transistor configured to operate when a first voltage applied thereto exceeds a first threshold value, the first transistor being disposed in an input stage; a second transistor configured to operate when a second voltage applied thereto exceeds a second threshold value, the second transistor being disposed in the input stage; an output stage configured to perform voltage switching and output according to a change in magnitude relationship between the first voltage and the second voltage; a node group configured to, during a non-operational state in which the first voltage and the second voltage are not compared, vary at least either the first threshold value or the second threshold value; and a threshold value adjuster configured to, when the absolute value of potential difference between the first voltage and the second voltage becomes equal to or smaller than a first setting value, apply voltages to the node group such that voltage value output by the output stage becomes equal to or smaller than a predetermined second setting value to adjust at least either the first threshold value or the second threshold value.