| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a compute power supply control circuit capable of automatically discriminating and controlling the interruption of a power supply in accordance with judgement whether a computer has an automatic interruption function or not. SOLUTION: A power supply control circuit B discriminates whether the computer has the automatic interruption function or not in accordance with judgement whether power supply voltage (DC 5V) is impressed from the RAS board A of the computer or not. Either one of photocouplers 121 or 122 in a discrimination circuit 12 is turned on, and when the computer has the automatic interruption function, a flip flop(FF) 10 is reset by a power supply off command generated from the computer after the end of automatic interruption processing of the power supply when a power supply switch 1 is in interrution operation and a signal from the FF 10 is extracted as a power supply control signal through the photocoupler 121 . At the time of executing the interruption operation of the switch 1 when the computer has no automatic interruption function, an output from an inversion circuit 5 is immediately extracted as a power supply control signal.</p> |
