| 摘要 |
A system for supplying an operating voltage to a CPU ( 50 ) includes a power supply ( 10 ) for supplying power to a computer, a PWM controller ( 30 ), a feedback circuit ( 70 ), and a plurality of electronic elements. The PWM controller converts voltage supplied to the computer to an operating voltage of the CPU. The feedback circuit comprises a plurality of resistors and capacitors, and feeds back a feedback voltage to the PWM controller. The feedback circuit further includes a thermistor. When resistance of the resistors is changed due to surrounding temperature changing, the thermistor equalizes the resistance changing.
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