System and method for detecting a device requiring power
AssigneeBroadcom Corporation
InventorsVafa Rakshani, Nariman Yousefi
Life of this patent
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Abstract
A system and technique for detecting a device that requires power is implemented with a power detection station. The power detection system includes a detector having an output and a return which are coupled together by the device when the device requires power. The detector includes a word generator for generating test pulses for transmission to the device via the detector output, and a comparator for comparing the detector output with the detector return. The power detection station has a wide variety of applications, including by way of example, a switch or hub.
Claims17
A method of detecting when a device on a two-way transmission line, comprising first and second conductors, requires power, the method comprising:
- (a) placing, at a detecting location, a test signal on the first conductor of the two-way transmission line;
- (b) selectively coupling, proximate the device, the first and second conductors of the two-way transmission line when the device requires power;
- and
- (c) checking, at the detecting location, the second conductor of the two-way transmission line for a signal substantially equivalent to the test signal or a processed version of the test signal.
Dependencies are inferred from the claim text.