Non-saturating, flux cancelling diplex filter for power line communications
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United States of America Patent
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-
Jan 23, 2001
Grant Date -
N/A
app pub date -
Nov 18, 1998
filing date -
Nov 18, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power line communications filter has an input terminal, an output terminal, and a common terminal. A transformer has primary and secondary windings, each having one end connected to the respective input and output terminals, and another end connected to a common connection. The windings are wound on a high permeability magnetic core in such a way as to promote flux leakage and with a winding polarity such that flux cancellation occurs when current flows through the windings in series. A capacitor is connected between the common terminal and the common connection of the primary and secondary windings. The capacitor has a large impedance at low frequencies such that low frequency current flows through both the windings in series and flux cancellation occurs.
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