Power switching circuit of network-connected device

Details Power switching circuit of network-connected device Power switching circuit of network-connected device

1999-06-09

2000-05-09

Jackson, Stephen W.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 82, 361 58, 361115, H02H 300

Patent

active

060612207

ABSTRACT:
A power switching circuit is provided, which automatically performs the necessary power switching, and by which the power specifications of external devices in a network can be uniformly determined. The power switching circuit comprises, for each external device, (i) a first diode for transmitting the power from the main device to the network, and for preventing power from reversely flowing from the network to the main device; (ii) a second diode for transmitting power from the external device to the main device, and for preventing power from reversely flowing from the main device to the external device; and (iii) a port for physically connecting the main device and the external device. The connection between the external devices is maintained regardless of the state of the power of the main device.

REFERENCES:
patent: 3577125 (1971-05-01), Frisbie
patent: 4023081 (1977-05-01), Murray
"P1394 Standard for a High Performance Serial Bus," P1394, Draft 8.0v4, IEEE Standards Department, pp. 84-85 (Nov. 1995).

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