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.
Claims9
A detecting station having an output and a return coupled to a two-way transmission line, comprising:
- a word generator operable to generate a test word that is transniitted on the detection station output;
- a comparator to compare the detecting station output with the detecting station return;
- and
- a controller operable to determine whether a device requiring power is coupled to the transmission line based on the comparison;
- wherein the test word comprises an address of the controller.
A detector having an output and a return coupled to a two-way transmission line, comprising:
- a word generator operable to generate a test word that is transmitted on the detector output;
- a register coupled between the word generator and the detector output and operable to latch a word generator output in response to a trigger;
- a timer enabled by the trigger for a predetermined time thereafter;
- a comparator operable to compare the detector output with the detector return, the comparator being enabled only while the timer is enabled;
- and
- a controller operable to determine whether a device requiring power is coupled to the transmission line based on the comparison.
Dependencies are inferred from the claim text.