| 摘要 |
An integration voltage obtained by continuously integrating an input voltage and a reference voltage is compared with a base voltage GND by a voltage comparator. The time that is required until a comparison result is inverted is counted by a counter And a count result is outputted as a digital signal OUT. In voltage comparators, the integration voltage is compared with a voltage that is higher than the base voltage GND by a predetermined voltage and with a voltage that is lower than the base voltage GND by a predetermined voltage, respectively. A difference between the inversion time of the comparison result of the voltage comparator and that of the voltage comparator is measured by a subtractor.
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