Systems and methods for powering circuits for a communications interface
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United States of America Patent
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Aug 25, 2015
Grant Date -
Feb 9, 2012
app pub date -
Oct 20, 2011
filing date -
May 7, 2007
priority date (Note) -
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Abstract
Embodiments include systems and methods of powering data communications transmitter circuitry using current sinked from biasing circuitry used to bias a transmission line between the data communications transmitter circuitry and data communications receiver circuitry. In some embodiments, the current sinked from the biasing circuitry is sourced by a power supply configured to power the data communications receiver circuitry. The current sinked from the biasing circuitry is then re-used to power the data communications transmitter circuitry. The data communications transmitter circuitry may be operated using less power overall by re-using the current first used to bias the transmission line to power the data communications transmitter circuitry. Various embodiments include HDMI transceivers, DVI transceivers, and DisplayPort transceivers.
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