Transformer coupler for communication over various lines
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United States of America Patent
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-
Sep 24, 1996
Issued Date -
N/A
app pub date -
Jul 1, 1994
filing date -
Apr 28, 1989
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Apparatus for electrical line communication that includes a coupler at each of two or more locations along a pair of lines, the coupler having capacitive circuits serially connected with an air-core transformer. The capacitive circuit is designed to resonate with the air-core transformer at a preselected frequency. A transmitter, receiver and modem may also be provided at each location. The apparatus incorporates a novel phase linear coupler which eliminates noise and is matched resistively to the characteristic impedance of the line at a preselected frequency. This apparatus therefore linearizes communication on the line and allows high speed data and voice communication over long distances.
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