Coupling Circuit for Power Line Communications
AssigneeSTMicroelectronics S.r.l.
InventorRiccardo Fiorelli
Life of this patent
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Abstract
A coupling circuit for power line communications includes a coupling transformer having first and second mutually coupled windings, with the first winding connectable to a power line. The second winding includes a pair of intermediate taps with one or more tuning inductor therebetween. The inductor or inductors are set between a first portion and a second portion of the second winding of the coupling transformer. A switch member is provided coupled with the inductor. The switch member is selectively actuatable to short-circuit the inductor.
Claims20
A circuit for communication over a power line, the circuit comprising:
- a coupling transformer comprising a primary winding mutually coupled to a secondary winding, the primary winding coupled to the power line;
- and
- a tuning circuit coupled to the secondary winding, the tuning circuit comprising a plurality of switchable inductors arranged in series, each of the plurality of switchable inductors comprising an inductor arranged in parallel with a respective switch.
A method of communication over a power line, the method comprising:
- determining, by a communication unit, a tuned impedance for communication over the power line;
- selecting, by the communication unit, a circuit configuration of a tuning circuit in accordance with the tuned impedance, the circuit configuration of the tuning circuit comprising selective arrangement of one or more inductors in series;
- and
- communicating, by the communication unit, communication signals over the power line.
A circuit for communication over a power line, the circuit comprising:
- a coupling transformer comprising a primary winding mutually coupled to a secondary winding, the primary winding coupled to the power line, the secondary winding comprising a first secondary winding and a second secondary winding;
- and
- a switchable inductor arranged in series between the first secondary winding and the second secondary winding, the switchable inductor comprising an inductor arranged in parallel with a switch.
Dependencies are inferred from the claim text.