Controller, system, and method for re-establishment of common mode in a transmission driver
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United States of America Patent
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May 29, 2018
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N/A
app pub date -
Sep 30, 2016
filing date -
Sep 30, 2016
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Abstract
A method, control apparatus, and system for re-establishing a common mode in a transmitter involve switching a driver circuit of the transmitter to a quick charge or quick discharge mode based on an output value of the transmitter. When the output later exceeds a programmable common mode voltage, the driver circuit is switched to a classical margining mode to bring the output back towards the targeted common mode voltage. The modes are switched by adjusting the number of activated pull-up and pull-down segments. More pull-up segments and less pull-down segments are activated in the quick charge mode than the classical margining mode. More pull-down segments and less pull-up segments are activated in the quick discharge mode than the classical margining mode.
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