Transmitter including pre-distortion

Details Transmitter including pre-distortion Transmitter including pre-distortion

2008-02-08

2011-10-18

Ha, Dac (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S229000, C375S233000, C375S234000, C398S193000, C455S114300

Reexamination Certificate

active

08040973

ABSTRACT:
The present invention relates to pre-distortion in transmitter circuits and provides a circuit for introducing pre-distortion into the output of a transmitter, wherein said pre-distortion comprises a pre-cursor, a cursor and a post-cursor, the circuit comprising: a first driver arranged to switch an output drive between said pre-cursor and said cursor; a second driver arranged to switch an output drive between said post-cursor and said cursor; a third driver arranged to switch an output drive between a positive cursor drive and a negative cursor drive. The arrangement provided give flexibility when setting the pre-cursor, cursor and post-cursor levels.

REFERENCES:
patent: 6680681 (2004-01-01), Hsu et al.
Lin, Lei, et al.; Implementing a Digitally Synthesized Adaptive Pre-Emphasis Algorithm for use in a High-Speed Backplane Interconnection; Canadian Conf. on Electrical and Computer Engineering, 2004, Niagra Falls, Ont., Canada May 2-5, 2004; pp. 1221-1224.

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