Electrical computers and digital processing systems: support – Computer power control – Power conservation
Reexamination Certificate
2006-01-31
2006-01-31
Browne, Lynne H. (Department: 2116)
Electrical computers and digital processing systems: support
Computer power control
Power conservation
C713S300000, C713S310000, C713S320000, C713S322000, C713S324000, C370S287000, C370S318000, C370S433000, C370S463000
Reexamination Certificate
active
06993667
ABSTRACT:
An energy saving circuit is connected to a receiver of a first physical layer of a first network device. The energy saving device has first and second energy saving modes. In the first energy saving mode, a sense circuit generates a receive signal when connection activity is detected by the receiver. The energy saving circuit powers down the physical layer when the receiver does not detect the connection activity. An autonegotiation circuit powers up the first physical layer and negotiates a connection with a second physical layer of a second network device when the sense circuit generates the receive signal. In a second energy saving mode, a second timer periodically powers a transmitter and generates a link pulse. After the transmitter generates the link pulse, the transmitter is turned off.
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IEEE, Std 802.3, 2000 Edition, Local and Metropolitan Area Networks, Section 40.4.4 - 40.4.6.
Browne Lynne H.
Marvell International Ltd.
Patel Nitin C.
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