Systems and Methods for Powering Circuits for a Communications Interface
First Claim
1. An electronic circuit comprising:
- a current regulator configured to sink a current regulated to be approximately constant; and
a voltage regulator including a power output and configured to regulate a voltage of the power output to be approximately constant, the voltage regulator being configured to receive the current sinked by the current regulator from the current regulator, and configured to supply the current sinked by the current regulator to another electronic circuit through the power output.
1 Assignment
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Accused Products
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 can be operated using less power overall than the prior art 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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Citations
6 Claims
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1. An electronic circuit comprising:
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a current regulator configured to sink a current regulated to be approximately constant; and a voltage regulator including a power output and configured to regulate a voltage of the power output to be approximately constant, the voltage regulator being configured to receive the current sinked by the current regulator from the current regulator, and configured to supply the current sinked by the current regulator to another electronic circuit through the power output. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification