| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a power feeder which secures the power supply in the OFF state of power for a long time to a plurality of load circuits. <P>SOLUTION: A first comparator 107 of the power feeder 100 switches on a first switch 105 when a power circuit 101 is connected and a sufficient input DC voltage is supplied, and switches off a first switch 105 and separates it so that charge should not be lost to the side of the power circuit 101 when the power circuit 101 is removed and the input DC voltage of the power circuit 101 falls under a first reference voltage VREF 1. Furthermore, a second comparator 108 switches on the second switch 106 and connects the first capacitor 102 with the second capacitor 103 in parallel and supplies power to the first load circuit 110 and the second load circuit 120 when the input DC voltage of the power circuit 101 falls under a second reference voltage VREF 2 lower than the first reference voltage VREF 1. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
