Circuits and methods for providing an impedance adjustment
AssigneeSilicon Laboratories Inc.
InventorsXiqun Zhu, Don Alfano
Life of this patent
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Abstract
An apparatus includes a signal generator and a control circuit. The signal generator includes a control terminal and includes a current electrode coupled to a terminal that is configured to couple to a power line to receive direct current (DC) power from a power generator. The control circuit is coupled to the current electrode and the control terminal of the signal generator. The control circuit determines an impedance associated with the power generator and applies a control signal to the control terminal of the signal generator to produce an impedance adjustment signal on the current electrode for communication to the power generator through the power line in response determining the impedance.
Claims20
A method comprising:
- controlling a signal source, using a control circuit, during a first mode to selectively apply a signal to an input node configurable to couple to a power line to receive a power supply;
- measuring an electrical parameter of the input node during the first mode using a detector circuit;
- determining an impedance associated with the power line in response to measuring the electrical parameter using the control circuit;
- and
- controlling the signal source, using the control circuit, during a second mode to provide an impedance adjustment signal to the input node for communication to a remote device through the power line.
A circuit comprising:
- a node configured to receive a power supply from a power generator;
- a signal generator including a control input and including an output coupled to the node;
- a detector coupled to the node to measure a signal at the node to determine an electrical parameter associated with the power generator;
- and
- a control circuit configured to determine an impedance based on the measured signal and to apply a control signal to the control input of the signal generator to provide an impedance adjustment signal to the power generator via the node in response determining the impedance.
A method comprising:
- controlling a signal source, using a control circuit, during a first mode to selectively apply a signal to a node configurable to receive a power supply from a power source via a power line;
- determining an impedance associated with the power line using the control circuit;
- and
- controlling the signal source, using the control circuit, during a second mode to provide an impedance adjustment signal to the power line via the node for communication to the power source.
Dependencies are inferred from the claim text.