US 11,728,845 B2 · Variable impedance circuit

Abstract

A power line communication device including a current path provided between a first terminal and a second terminal. A coupling circuit includes a first circuit of a first inductor connected in parallel with a first capacitor and a first resistor, wherein the coupling circuit is connected between the first and second terminals. A sensor is configured to sense a communication parameter of the coupling circuit. The communication parameter may be a resonance of the first circuit, the quality (Q) factor of the resonance, the bandwidth (BW) of the coupling circuit, the resistance of the first resistor, or the impedance of the first circuit. A transceiver is adapted to couple to the first and second terminal to transmit a signal onto the current path or receive a signal from the current path responsive to the parameter of the coupling circuit and a level of current in the current path sensed by the sensor.

Claims18

Dependent claims

An apparatus comprising:

a first terminal and a second terminal;
a first circuit comprising a first inductor connected in parallel to a capacitor and connected in parallel to a resistor;
a second circuit comprising a second inductor, wherein the second inductor has a higher inductance and a lower saturation current than the first inductor, and wherein the first circuit and the second circuit are connected in series between the first terminal and the second terminal to form a current path between the first terminal and the second terminal;
a first sensor configured to sense a level of current in the current path;
a second sensor;
and
a controller configured to determine, based on one or more measurements of the second sensor, a value corresponding to one of:
a resonant frequency of the first circuit, a quality (Q) factor of a resonance corresponding to the resonant frequency, a resistance of the resistor, an impedance of the first circuit, or a bandwidth of the apparatus.

5 more elements

Dependencies are inferred from the claim text.

Variable impedance circuit

Life of this patent

Variable impedance circuit

Life of this patent

Abstract

Claims18