| US 7,501,913 B2 | ||
| Power line communication apparatus and connecting device | ||
| Tsunehiro Hanada, Fukuoka (Japan); Akihiro Yamashita, Saga (Japan); and Yuji Igata, Fukuoka (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Filed on Feb. 15, 2007, as Appl. No. 11/675,141. | ||
| Claims priority of application No. 2006-038319 (JP), filed on Feb. 15, 2006. | ||
| Prior Publication US 2007/0190840 A1, Aug. 16, 2007 | ||
| Int. Cl. H03H 7/46 (2006.01) | ||
| U.S. Cl. 333—132 [375/259] | 18 Claims |
| 1. A power line communication apparatus that superimposes a signal having a first frequency on power having a second frequency
lower than the first frequency, comprising:
a first connector to which the power is input;
a communication circuit that superimposes the signal on the power input to the first connector;
a power supply circuit that supplies the power input to the first connector to the communication circuit;
a second connector that outputs the power input to the first connector to the outside of the power line communication apparatus;
and
a single filter that has impedance characteristics in which impedance corresponding to the first frequency is higher than
impedance corresponding to the second frequency,
wherein the first connector is connected to the power supply circuit through the single filter, and the first connector is
connected to the second connector through the single filter.
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