System and method of equalization of high speed signals

Details System and method of equalization of high speed signals System and method of equalization of high speed signals

2011-03-08

2011-03-08

Wang, Ted M (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C375S219000, C375S229000, C375S230000, C375S259000

Reexamination Certificate

active

07903729

ABSTRACT:
In one aspect, the present invention is directed to a technique of, and system for enhancing the performance of high-speed digital communications through a communications channel, for example a backplane. In this aspect of the present invention, a transmitter includes equalization circuitry to compensate for bandwidth limitations and reflections in high-speed digital communication systems. In one embodiment, the equalization circuitry is designed, programmed and/or configured to introduce intersymbol interference in order to improve the signal integrity in high-speed communications and enhance the operation and performance of such systems. In this regard, the equalization circuitry includes temporally overlapping leading and/or trailing taps (relative to the data (symbol) signal) to reduce, minimize, mitigate or effectively eliminate pre-cursor and/or post-cursor intersymbol interference due to, for example, bandwidth limitations and reflections in high-speed digital communication systems. The amount of equalization may be programmed, adjusted or controlled by varying the positioning of the tap(s), varying the coefficients of the tap(s), and/or varying the pulse durations of the tap(s) (that is, the pulse duration of the equalization signal attributed to the tap).

REFERENCES:
patent: 4422175 (1983-12-01), Bingham et al.
patent: 4535443 (1985-08-01), Korevaar
patent: 4995057 (1991-02-01), Chung
patent: 7233617 (2007-06-01), Gorecki

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