APPARATUS AND METHOD FOR TERMINATION POWERED DIFFERENTIAL INTERFACE PERIPHERY

摘要

An apparatus (210) and method for supplying power to the peripheral circuits of a transmitter circuit, especially an HDMI transmitter circuit, is disclosed. In an HDMI transmitter (110) the termination resistors (120) of the output driver are part of the receiver. DC power for the driver is supplied through these termination resistors. In prior art implementations of circuits this power, supplied by the receiver circuit, is wasted in the DC set-up circuit of the differential line driver. It is suggested to use this wasted power from the remote termination (120) to power selected peripheral circuits of the transmitter. The use of this wasted power in the line driver for powering the peripheral circuits reduces the total system power.