Feedback impedance control for driving a signal
First Claim
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1. A system for driving a first signal onto a wireline, the system comprising:
- a driver configured to drive a deterministic signal onto the wireline with an unknown impedance load and driving the first signal with a modified signal strength onto the wireline;
a digital system coupled to an input of the driver and configured to produce the deterministic signal and the first signal; and
feedback circuitry configured to measure a quality of an output signal from the wireline and modify the signal strength of the first signal based on the quality of the output signal by changing a gain of the first signal in the digital system;
wherein the wireline comprises a residential powerline used for communications.
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Abstract
A system for driving a first signal onto a wireline includes a driver and feedback circuitry. The driver drives a deterministic signal onto the wireline with an unknown impedance load. The feedback circuitry measures a quality of the output signal from the wireline and modifies a signal strength of the first signal based on the quality of the output signal. The driver then drives the first signal onto the wireline with the modified signal strength.
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Citations
25 Claims
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1. A system for driving a first signal onto a wireline, the system comprising:
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a driver configured to drive a deterministic signal onto the wireline with an unknown impedance load and driving the first signal with a modified signal strength onto the wireline; a digital system coupled to an input of the driver and configured to produce the deterministic signal and the first signal; and feedback circuitry configured to measure a quality of an output signal from the wireline and modify the signal strength of the first signal based on the quality of the output signal by changing a gain of the first signal in the digital system; wherein the wireline comprises a residential powerline used for communications. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of driving a first signal onto a wireline, the method comprising:
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producing a deterministic signal and the first signal by a digital system; driving the deterministic signal onto the wireline with an unknown impedance load; measuring a quality of an output signal from the wireline; modifying the signal strength of the first signal based on the quality of the output signal by changing a gain of the first signal in the digital system; and driving the first signal onto the wireline with the modified signal strength; wherein the wireline comprises a residential powerline used for communications. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification