Electrical transmission or interconnection systems – Switching systems – Switch actuation
Reexamination Certificate
2006-03-28
2006-03-28
Deberadinis, Robert L. (Department: 2836)
Electrical transmission or interconnection systems
Switching systems
Switch actuation
C370S902000
Reexamination Certificate
active
07019419
ABSTRACT:
A motherboard is protected from burning or other damage caused by installation of card of a higher voltage than that for which the motherboard is designed, such as the installation of an AGP 2× graphics card in a motherboard designed for an AGP 4× graphics card. In the AGP example, a detection circuit determines whether the installed card is an AGP 2× or an AGP 4× graphics card. First and second power controlling circuits that control delivery of the DC power to the motherboard are either opened or closed based on whether and what type of card is installed. A switch may also be provided to control the passing of DC power through the first and second power controlling circuits. An alert unit, such as a light or buzzer, may also be provided to indicate the installation of a higher voltage card.
REFERENCES:
patent: 5613130 (1997-03-01), Teng et al.
patent: 5754870 (1998-05-01), Pollard et al.
patent: 6181118 (2001-01-01), Meehan et al.
patent: 6618264 (2003-09-01), Megason et al.
Deberadinis Robert L.
Fenwick & West LLP
Shuttle Inc.
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