| 摘要 |
PROBLEM TO BE SOLVED: To provide a comparison circuit that can produce a high precision comparative determination result even at high temperature by eliminating an effect of an offset voltage of a comparator in the comparison circuit.SOLUTION: A comparison circuit includes: a comparator including a first input terminal fed with a first input voltage via a first capacitor, a second input terminal fed with a second input voltage via a second capacitor, and an output terminal; a first switch connected at one end to the first input terminal and turned on in a sampling phase to make a voltage of the first input terminal at a voltage of the output terminal; a second switch connected at one end to the second input terminal and turned on in the sampling phase to make a voltage of the second input terminal at a reference voltage; and a third switch turned on in a comparison phase to make voltages of the other end of the first switch and the other end of the second switch equal to each other. |
