Feedback impedance control for driving a signal

摘要

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.

主权项

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.