Communications: electrical – Systems – Selsyn type
Reexamination Certificate
2005-01-18
2005-01-18
Crosland, Donnie L. (Department: 2636)
Communications: electrical
Systems
Selsyn type
C340S315000, C340S315000, C333S02400C, C333S02400C, C336S174000
Reexamination Certificate
active
06844810
ABSTRACT:
There is provided an arrangement of components for coupling data between a power line and a communication device. The arrangement includes an inductive coupler that employs a power line conductor as a primary winding, a capacitor connected across a secondary winding of the inductive coupler for creating a resonant circuit with the secondary winding at a frequency within a desired frequency band, and an impedance matching transformer for connecting a communications device to the secondary winding. The resonant circuit has a loaded Q consistent with the desired bandwidth. An alternative arrangement includes a capacitor in series with a conductive cylinder between the power line and the communication device, where the capacitor is for blocking power line voltage while passing a signal between the power line and the communication device, and the conductive cylinder appears as a low inductance to the signal.
REFERENCES:
patent: 4142178 (1979-02-01), Whyte et al.
patent: 5684450 (1997-11-01), Brown
patent: 5717685 (1998-02-01), Abraham
patent: 5856776 (1999-01-01), Armstrong et al.
Ambient Corporation
Crosland Donnie L.
Ohlandt Greeley Ruggiero & Perle LLP
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