Digital data transmission

Details Digital data transmission Digital data transmission

1991-05-20

1993-05-11

Ng, Jin F.

Communications: electrical

Systems

Selsyn type

340310A, 340310CP, 375 36, 375 37, H04B 354

Patent

active

052105199

ABSTRACT:
A method and apparatus for transmitting data over a power line (2) and having particular application for flight control networks. The method enables bi-directional transmission of data over either DC or AC power lines. Transformers (T.sub.3, T.sub.4) used for coupling data onto and from the power lines (2) comprise three windings (L.sub.1, L.sub.2 and L.sub.3) and a ferrite core. Saturation of the core is avoided by arranging for the load current to flow in opposite senses through two (L.sub.1 and L.sub.2) of the windings. By choosing the number of turns of the two windings to be equal, complete cancellation of DC flux inside the core is possible.

REFERENCES:
patent: 4188619 (1980-02-01), Perkins
patent: 4342013 (1982-07-01), Kallman
patent: 4481501 (1984-11-01), Perkins
patent: 4862157 (1989-08-01), Noel
patent: 5077543 (1991-12-01), Carlile

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