| 摘要 |
<p>PURPOSE:To preclude trouble due to the malfunction of a system by turning on no power source until the source voltage recovers above a certain level by the charging, etc., of a battery after the source voltage drops below its normal range once. CONSTITUTION:A power source controller is equipped with a source voltage monitoring circuit 12 which monitors the output voltage level of the battery 11, a power circuit 13, and a power switch 14 and further provided with a source voltage state decision means 15, a power circuit control means 16, a power switch state read means 17, and a reference voltage varying means 18. Then when the source voltage drops below the normal range, the said read means 17 turns on the power switch 14 and the power circuit control means control means 16 never actuates the power circuit 13 even at a request to turn on the power source. Further, when it is decided that the source voltage drops below the normal range, a reference voltage varying means 18 raises the monitoring reference voltage level of the source voltage monitoring circuit 12 to prevent the power source from being turned on even at the time of natural recovery.</p> |
