| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power supply system, which receives power supply from a power source with high degree of certainty of constantly changing events of electric power, capable of constructing a system that maintains power supply to a load with high priority by reducing or shutting down power supply in order from a subordinated load when supplied power drops. <P>SOLUTION: A voltage conversion circuit 1 and a differential amplifier 1 includes a positive feedback circuit that decreases an input current into a current input terminal of the voltage conversion circuit 1 when a potential of the current input terminal of the voltage conversion circuit 1 decreases and that increases an input current into the current input terminal of the voltage conversion circuit 1 when the potential of the current input terminal of the voltage conversion circuit 1 increases. <P>COPYRIGHT: (C)2013,JPO&INPIT |
