Voltage-mode driver with pre-emphasis, slew-rate control and...

Details Voltage-mode driver with pre-emphasis, slew-rate control and... Voltage-mode driver with pre-emphasis, slew-rate control and...

2000-12-29

2004-03-09

Thai, Xuan M. (Department: 2181)

Electrical computers and digital data processing systems: input/

Intrasystem connection

C713S401000

Reexamination Certificate

active

06704818

ABSTRACT:

FIELD
This invention relates to a voltage-mode driver, more particularly, a push-pull voltage-mode driver which maintains a constant slew rate while providing pre-emphasis and source termination impedance.
BACKGROUND
In communicating data over a bus, integrated circuits are used. The integrated circuits include a data transmitter, or driver circuit, and a receiver circuit. Intersymbol interference is a function of the frequency content of data, and slew rate control is used to limit the frequency content. Pre-emphasis is also used to compensate for high frequency loss on a transmission line. Further, an impedance mismatch between the integrated circuit driver and a transmission line bus can decrease the signal-to-noise ratio. Techniques are also employed to reduce impedance mismatching.


REFERENCES:
patent: 4312060 (1982-01-01), Grodinsky
patent: 4479250 (1984-10-01), Flood
patent: 5194761 (1993-03-01), Smith
patent: 5739707 (1998-04-01), Barraclough
patent: 6256235 (2001-07-01), Lee
patent: 6281715 (2001-08-01), DeClue et al.
patent: 6313682 (2001-11-01), Muller et al.
patent: 6466626 (2002-10-01), Cecchi et al.
patent: 200236816600 (2002-12-01), None

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