| 摘要 |
A window voltage comparator, which determines whether a difference between two voltages is greater or smaller than a set value, is equipped with a first differential pair including a first transistor to which a first input voltage is applied and a second transistor to which a second input voltage is applied, a second differential pair including a third transistor to which a first reference voltage is applied and a fourth transistor to which a second reference voltage is applied, and a comparison circuit that compares the sum of drain currents of the first and fourth transistors with the sum of drain currents of the second and third transistors and thereby determines whether a difference between the first input voltage and the second input voltage is greater or smaller than a set value.
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