Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2006-02-28
2006-02-28
Bayard, Emmanuel (Department: 2638)
Pulse or digital communications
Transmitters
Antinoise or distortion
Reexamination Certificate
active
07006580
ABSTRACT:
In a pre-emphasis unit device which transmits signals along a transmission line with a frequency-dependent pre-emphasis, the frequency response of the pre-emphasis unit is varied to match characteristics of the transmission line. Initially the pre-emphasis unit is set to transmit pulses of known length along a transmission line with the pre-emphasis of the high frequency portions of the signal being relatively low. The duration of the received pulse is measured. Gradually the pre-emphasis unit is modified to increase the high-pass filtered signals until the measured duration of the pulse is as great as the transmitted duration, to within a certain tolerance.
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Bayard Emmanuel
Pillsbury Winthrop Shaw & Pittman LLP
Xyratex Technology Limited
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