Transmit based equalization using a voltage mode driver
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United States of America Patent
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-
Jun 5, 2007
Grant Date -
N/A
app pub date -
Feb 1, 2005
filing date -
Feb 1, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
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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