Peripheral device receiver detection in a high noise...

Details Peripheral device receiver detection in a high noise... Peripheral device receiver detection in a high noise...

2007-03-13

2007-03-13

Tran, Khanh (Department: 2611)

Pulse or digital communications

Transceivers

C324S118000

Reexamination Certificate

active

10328719

ABSTRACT:
A receiver detector of a peripheral device for use in a computer system to detect whether a receiver is electrically coupled to a data port of the peripheral device includes a modulator, a high pass filter, and a demodulator. The modulator is configured to modulate a receiver detect signal at a frequency that is higher than a noise frequency, below which high amplitude noise can develop. The high pass filter is electrically coupled to the receiver detect signal and is configured to block frequencies of the receiver detect signal that are below the noise frequency and pass a filtered receiver detect signal. The demodulator is configured to demodulate the filtered receiver detect signal and produce a recovered receiver detect signal that is indicative of whether a receiver is electrically coupled to the data port.

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