Telecommunications – Transmitter – Power control – power supply – or bias voltage supply
Reexamination Certificate
2005-11-07
2008-09-16
Nguyen, Tony T (Department: 2618)
Telecommunications
Transmitter
Power control, power supply, or bias voltage supply
C455S405000, C455S501000, C455S067110, C455S550100, C370S436000, C370S502000
Reexamination Certificate
active
07426374
ABSTRACT:
A system for supplying power to a load over a communication link has high-side current sensing circuitry for measuring a high-side current value, low-side current sensing circuitry for measuring a low-side current value, and control circuitry responsive to both the high-side current value and the low-side current value to detect a fault condition, detect information from the load, and/or transmit information to the load by creating a prescribed unbalance between the high-side current and the low-side current.
REFERENCES:
patent: 6426947 (2002-07-01), Banker et al.
patent: 7016368 (2006-03-01), Binder
patent: 2004/0227522 (2004-11-01), Male
patent: WO 2004/068781 (2004-08-01), None
“Part 3: Carrier Sense Multiple Access With Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications”, IEEE Std 802.3af-2003, XP-002383689.
“All You Need to Know About Power Over Ethernet (POE) and the IEEE 802.3AF Standard”, Galit Mendelson, XP—002372480.
Search Report dated Nov. 10, 2006.
Dwelley David McLean
Heath Jeffrey Lynn
Linear Technology Corporation
McDermott Will & Emery LLP
Nguyen Tony T
LandOfFree
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