| 摘要 |
A device for determining whether a source voltage from a power source to be applied to a load such as an electrical apparatus is below a standard level but above a specified level or below this specified level includes a voltage divider circuit for dividing the source voltage, a single voltage level detection circuit for comparing an inputted voltage, a transistor switch with which the source voltage or the output voltage from the voltage divider circuit is selectably inputted to the voltage level detection circuit, and a central processing unit for controlling the operation of the transistor switch according to the result of detection by the voltage level detection circuit.
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