Electrical computers and digital processing systems: support – Computer power control
Patent
1998-09-28
2000-10-03
Ray, Gopal C.
Electrical computers and digital processing systems: support
Computer power control
710100, G06F 126
Patent
active
061287431
ABSTRACT:
A bus hub for connection via a serial bus to a serial bus host hub includes a connector to a power supply, a bus controller and a switch coupled to the bus controller and to the power supply. The switch switches the bus hub between being powered by the power supply and being powered by the power from the serial bus host hub by switching the mode of operation between self-powered mode and bus-powered mode. A system for controlling communication and power in a serial bus includes a serial bus hub for detachably coupling at least one peripheral to a computer system, and a serial bus host hub capable of delivering power to the serial bus hub. The system also includes a power supply coupled to the serial bus hub that delivers power to the serial bus hub. The system also includes a bus controller that receives signals from the computer system through the serial bus, and receiving signals from the serial bus hub. The system also includes a switch that switches the serial bus hub between being powered by the power supply and being powered by the power from a serial bus host hub.
REFERENCES:
patent: 5675813 (1997-10-01), Holmdahl
patent: 5799196 (1998-10-01), Flannery
Kelton Margaret M.
Koestner Ken J.
Pertech, Inc.
Ray Gopal C.
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