| 摘要 |
PROBLEM TO BE SOLVED: To easily detect the hysteresis characteristic of a comparison circuit.SOLUTION: A control unit 4 controls an offset adjustment unit 3, which adjusts an offset amount of a comparison circuit 2, to change the offset amount from a value (max) to a value (min) to detect a value off1 at the change of an output signal logic level of the comparison circuit 2, and to change the offset amount from the value (min) to the value (max) to detect a value off2 at the change of the logic level, so as to detect the hysteresis characteristic of the comparison circuit 2 on the basis of a difference (off2-off1) between the value off1 and the value off2. |
