Power line communication system and power line branching apparatus
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United States of America Patent
Stats
-
Jan 17, 2006
Grant Date -
May 22, 2003
app pub date -
Nov 12, 2002
filing date -
Nov 19, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power line communication system comprises an indoor power line and one or more power line branching apparatuses connected to the indoor power line. The power line branching apparatus comprises a communication channel that is branched off from the indoor power line and connectable to a power line communication device, and a power supply channel that is branched off from the indoor power line and connectable to electrical equipment. The power line branching apparatus further comprises an impedance matching circuit and a normal mode filter circuit. The impedance matching circuit is provided on the power supply channel, and sets the impedance of the indoor power line to a predetermined value. The normal mode filter circuit is provided on the power supply channel, and reduces normal mode noise occurring from the electrical equipment connected to the power supply channel.
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