Circuit for turning on motherboard

Details Circuit for turning on motherboard Circuit for turning on motherboard

2007-12-20

2009-12-29

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Delay controlled switch

C327S365000, C327S377000, C327S427000, C327S544000, C361S199000, C365S229000

Reexamination Certificate

active

07639063

ABSTRACT:
An exemplary circuit for turning on a motherboard comprises a first switch module comprising a first terminal arranged to receive a standby power and connected to a sixth terminal of a computer front panel header, a second terminal arranged to receive the standby power, and a control terminal; a timing circuit charged by a system power; and a second switch module comprising a first terminal connected to the control terminal of the first switch module via the timing circuit, a second terminal arranged to receive the standby power, and a control terminal arranged to receive the system power, wherein, when the system power is lost, the second switch module discharges the timing circuit for turning on the first switch module after a discharge time, and the motherboard is turned on when the first switch module is turned on to ground the sixth terminal of the computer front panel header.

REFERENCES:
patent: 3578988 (1971-05-01), Slowikowski
patent: 5945868 (1999-08-01), Robb et al.
patent: 6891707 (2005-05-01), Hiyama et al.
patent: 2006/0280005 (2006-12-01), Jiang et al.

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