Electrical transmission or interconnection systems – Wave form or wave shape determinative or pulse-producing...
Patent
1997-06-27
1998-10-06
Gaffin, Jeffrey A.
Electrical transmission or interconnection systems
Wave form or wave shape determinative or pulse-producing...
347850, 34031007, 455280, 455 75, 327233, H04B 104
Patent
active
058181270
ABSTRACT:
An apparatus for electrical line communications using FM video modulation, includes FM video modulation circuits and an impedance matching coupler at each of two or more locations along a pair of lines. The impedance matching couplers provide impedance matching, utilizing an air-core preselected frequency bands, sufficient to allow low-loss transmission of frequency modulated video signals. The coupler further eliminates noise and is matched resistively to the characteristic impedance of the line at the preselected frequency bands. A transmitter, receiver and associated circuits may also be provided at each location along the lines. The FM video modulation circuits, in combination with phase linear coupling techniques, provide for hi-fidelity video transmission over existing electrical lines, such as residential AC power wiring. In addition, a coupler with solid state impedance matching is provided.
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Gaffin Jeffrey A.
Paladini Albert W.
Videocom, Inc.
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