System and method for termination powered differential interface periphery
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United States of America Patent
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Jul 23, 2013
Grant Date -
Jul 19, 2012
app pub date -
Mar 29, 2012
filing date -
May 7, 2007
priority date (Note) -
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Abstract
An apparatus and method for supplying power to the peripheral circuits of a transmitter circuit, especially an HDMI transmitter circuit, is disclosed. In an HDMI transmitter, the termination resistors of the output driver are part of the receiver. DC power for the driver is supplied through these termination resistors. In prior art implementations, power supplied by the receiver circuit is wasted in the DC set-up circuit of the differential line driver. In various embodiments, this wasted power may be recovered from the remote termination to power selected peripheral circuits of the transmitter. The use of this wasted power may reduce the total system power consumption.
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