Combination of high-side and low-side current sensing in...

Details Combination of high-side and low-side current sensing in... Combination of high-side and low-side current sensing in...

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.

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