Method and apparatus for current sharing ethernet power...

Details Method and apparatus for current sharing ethernet power... Method and apparatus for current sharing ethernet power...

2006-04-13

2009-02-10

Suryawanshi, Suresh K (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

C340S315000, C340S315000

Reexamination Certificate

active

07490251

ABSTRACT:
Methods and apparatus are disclosed for balancing power across all conductors of an Ethernet connection. Balancing circuitry is disclosed to allow an Ethernet midspan device to receive power from an Ethernet Power Sourcing Equipment (PSE) on the signal pairs of an Ethernet connection. The balancing circuitry is configured to sense the level of the received power, and generate a second power source substantially equal to the received power level. The received power is provided to an Ethernet Powered Device (PD) over the signal pairs of an Ethernet connection, and the generated power to the PD over the unused pairs of the Ethernet connection.

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PCT International Search Report and Written Opinion of the International Searching Authority having a date of mailing of Jul. 29, 2008 in co-pending PCT International Patent Application No. PCT/US07/66276, having an International Filing Date of Apr. 10, 2007 and the applicant of Cisco Technology, Inc., and entitled: Method and Apparatus for Current Sharing Ethernet Power Across Four Conductor Pairs Using a Midspan Device.

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