Transmit based equalization using a voltage mode driver

Details Transmit based equalization using a voltage mode driver Transmit based equalization using a voltage mode driver

2007-06-05

2007-06-05

Le, Don (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S083000

Reexamination Certificate

active

11048440

ABSTRACT:
A driver circuit. In one embodiment, the driver circuit includes a plurality of pull-up circuits and a plurality of pull-down circuits. The driver circuit also includes control logic that is coupled to activate/deactivate the pull-up and pull-down circuits. The driver circuit may perform emphasized signal transmissions having a voltage swing of a first magnitude or de-emphasized signal transmissions having a voltage swing of a second magnitude, wherein the first magnitude is greater than the second magnitude. The control logic is further configured to activate and/or deactivate pull-up and/or pull-down circuits such that the driver circuit output impedance in the emphasized mode is substantially equal to the output impedance in the de-emphasized mode.

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U.S. Appl. No. 11/033,757, filed Jan. 13, 2005.

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