Pre-emphasis adjustment method

Details Pre-emphasis adjustment method Pre-emphasis adjustment method

2006-03-02

2010-02-23

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Amplitude compression and expansion systems

C375S219000, C455S072000

Reexamination Certificate

active

07667554

ABSTRACT:
A pulse train having a specific amplitude is transmitted from a transmitting circuit, and the amplitude at the receiving end is measured by a comparator. A coarse adjustment control unit determines a coarse adjustment value of the pre-emphasis intensity based on the measured amplitude. The pre-emphasis intensity is changed within the course pre-emphasis range, and the maximum receivable time width of a test signal is obtained by a reception judging unit13by using a fine adjustment stage.

REFERENCES:
patent: 6934479 (2005-08-01), Sakamoto et al.
patent: 7006580 (2006-02-01), Haycock
patent: 7280763 (2007-10-01), Yamaguchi et al.
patent: 2006/0034358 (2006-02-01), Okamura
patent: 06-177798 (1994-06-01), None

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