Data receiving device

Details Data receiving device Data receiving device

2004-09-03

2008-08-26

Payne, David C. (Department: 2611)

Pulse or digital communications

Cable systems and components

Reexamination Certificate

active

07418038

ABSTRACT:
A data receiving device includes a reference clock signal transmitted through a differential conductor pair, estimating attenuation characteristics in the differential conductor pair serving as a transmission path of the reference clock signal, and compensating a transmission path attenuation of an NRZ signal based on the estimated attenuation characteristics. Because the reference clock repeats a transition between 0 and 1 at the same period as NRZ data period without fail, it is possible to estimate high frequency attenuation characteristics of a conductor by observing the amplitude of the reference clock at the receiving end. Characteristic control of a compensation filter is performed with respect to the NRZ signal to reproduce a proper transmission signal from a signal waveform that has been deteriorated by the attenuation caused in a long-distance transmission of high-speed digital data using the differential cable.

REFERENCES:
patent: 6577689 (2003-06-01), Smith et al.
patent: 2004/0096004 (2004-05-01), Wang
patent: 5 7230 (1993-01-01), None
patent: 2000 124959 (2000-04-01), None
patent: 2001 16289 (2001-01-01), None
Takao Ikeuchi et al., High-speed line driver receiver IC, NEC technical report, Dec. 24, 1993, vol. 46, No. 12, pp. 1-6.

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