System and method for termination powered differential interface periphery
First Claim
1. A method for powering at least some peripheral circuits of a differential output driver of a transmitter comprising:
- recovering wasted power from driver circuits of the differential output driver of the transmitter;
regulating the recovered power; and
supplying the regulated power as voltage and current outputs to power at least a portion of the peripheral circuits of the differential output driver of the transmitter.
2 Assignments
0 Petitions
Accused Products
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.
41 Citations
14 Claims
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1. A method for powering at least some peripheral circuits of a differential output driver of a transmitter comprising:
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recovering wasted power from driver circuits of the differential output driver of the transmitter; regulating the recovered power; and supplying the regulated power as voltage and current outputs to power at least a portion of the peripheral circuits of the differential output driver of the transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power recovery circuit for powering at least some peripheral circuits of a differential output driver of a transmitter comprising:
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a bias control circuit that recovers wasted power from driver circuits of the differential output driver of the transmitter; and a voltage regulator having an input coupled to an output of the bias control circuit, the voltage regulator being configured to regulate the recovered wasted power to provide regulated power and being further configured to supply the regulated power as voltage and current outputs to power at least a portion of the peripheral circuits of the differential output driver of the transmitter. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification