Apparatus and method for recovery of wasted power from differential drivers
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United States of America Patent
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Jan 28, 2014
Grant Date -
Jan 12, 2012
app pub date -
Sep 20, 2011
filing date -
May 7, 2007
priority date (Note) -
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Abstract
An apparatus and method for supplying power to circuits of an integrated circuit (IC) from the wasted power in low-swing high-speed differential line drivers used in the IC, is disclosed. In a high speed line driver the load resistors of the driver are connected to a power supply, either the local power supply or the receiver power supply. DC power for the driver is supplied through these resistors. A large portion of this power, supplied from the power supply is wasted in the DC set-up circuit of the differential line driver. It is proposed to use this wasted power to power selected circuits of an IC. The use of this wasted power from the drivers for powering the circuits reduces the overall power dissipation of the system.
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