| 摘要 |
A power switch circuit ( 400 ) includes a voltage divider circuit ( 401 ), a first reference voltage circuit ( 402 ), a second reference voltage circuit ( 403 ), a first compare circuit ( 404 ), a second compare circuit ( 405 ), a synthesizing circuit ( 406 ), and a switch circuit ( 407 ). The voltage divider circuit generates a divided voltage. The first reference voltage circuit and the second reference voltage circuit respectively generate a first reference voltage and a second reference voltage. The first compare circuit compares the first reference voltage with the divided voltage and generates a first comparison result. The second comparing circuit compares the second reference voltage with the divided voltage and generates a second comparison result. The synthesizing circuit synthesizes the first comparison result and the second comparison result, and generates a synthesized signal. The switch circuit switches on/off according to the synthesized signal.
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