Digital single signal line full duplex method and apparatus

Details Digital single signal line full duplex method and apparatus Digital single signal line full duplex method and apparatus

H - Electricity

04

L

340/101, 354/232

H04L 5/14 (2006.01)

Patent

CA 1048415

ABSTRACT A driver circuit that permits full duplex transmission of digital data on a single signal line includes apparatus for enabling a receiver of a station having a transmitter and a receiver to ignore outgoing digital signals from the transmitter of the same station and receive incoming signals. The circuit includes two current switches and a differential amplifier that combine the incoming and outgoing digital signals in the signal line to form a composite signal which shifts between predetermined amplitude levels and that recover the incoming digital signals from the composite signal. Using such n circuit a full duplex transmission system of a plurality of stations connected to a common single signal line is provided. Such a system can be operated in a broadcast mode wherein one station can trans- mit signals to the remainder of stations.

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