| 摘要 |
<p>PURPOSE:To eliminate trouble due to malfunction by leaving a power source off until a source voltage recovers by the charging of a battery, etc., above a constant level after the source voltage drops below its normal range once. CONSTITUTION:The power source controller is provided with a source voltage monitoring circuit 12 which monitors the output voltage level of the battery 11, a power circuit 13, and an power switch 14, and further provided with a source voltage state decision means 15 which decides whether or not the source voltage is normal according to the monitoring result and a reference voltage varying means 16. Then the turn on/off state of the power switch 14 is read and the operation of the power circuit 13 is controlled according to the switch state and the decision result of said decision means 15. Here, when the source voltage drops below its normal range, a power switch read means 17 closes the power switch 14 and the power circuit control means 16 never actuates the power circuit 13 even if there is a request to turn on the power source.</p> |
