Apparatus and method for implementing a home network using customer-premises power lines
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United States of America Patent
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Jun 26, 2001
Grant Date -
N/A
app pub date -
Oct 21, 1999
filing date -
Aug 11, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A power line filter connected to single-phase power lines (110-230 VAC, 50-60 Hz) enables transmission of HomePNA-type home network signals between network nodes connected to the main power lines as a network medium. The filter includes fuse resistors (R1, R2) that limit the current from the main power line, a transit diode circuit that clamps the bolts to a prescribed limit, eliminating energy that may be present in main power spikes. A pair of X2-type capacitors pass the 1 MHz or higher HomePNA signals, while rejecting the 50-60 Hz main power signal. A choke-type inductor eliminates any residual high voltage signals in the 50-60 Hz range by short circuiting the power signals, while maintaining a high impedance at the 1 MHz range, enabling the HomePNA signals to be safely passed to the RJ-11 connector of a physical layer transceiver of the Home Network Node.
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