Power supply system for motherboard

Details Power supply system for motherboard Power supply system for motherboard

2007-07-27

2010-06-29

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S351000, C703S007000

Reexamination Certificate

active

07746044

ABSTRACT:
A power supply system for a motherboard includes a voltage regulator circuit includes a system power source, and a voltage output terminal, a sampling circuit having an input, and an output receiving a high level sleep signal from a south bridge of the motherboard, a switching circuit having an input, and an output, a power connector having a control terminal connected to the output of the switching circuit, and a power source being connected to the power connector. When the voltage regulator circuit outputs a voltage greater than a predetermined stable voltage to the sampling circuit, the sampling circuit outputs a low level signal to the switching circuit which in return outputs a high level signal to the control terminal of the power connector to cut off power supply from the power source to the system power source.

REFERENCES:
patent: 5161183 (1992-11-01), Maytum
patent: 5657257 (1997-08-01), Lee
patent: 6198262 (2001-03-01), Squibb et al.
patent: 6713992 (2004-03-01), Matsuo et al.
patent: 7639466 (2009-12-01), Wang

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