Apparatus and method for bias compensation in line circuits
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United States of America Patent
Stats
-
Dec 27, 2005
Grant Date -
Jan 23, 2003
app pub date -
Jul 18, 2001
filing date -
Jul 18, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A transmission line circuit includes a line driver having first and second outputs coupled through a differential transmission line to first and second inputs of a line receiver. A first bias is provided between the first and second inputs of the line receiver. The second bias is applied between the first and second outputs of the line driver. As a result, the first and second biases substantially offset, and preferably cancel, each other. If the differential transmission line is not coupled to a line driver, the second bias associated with that line driver is not applied permitting the first bias to provide a relatively high noise margin.
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