Cancelling circuit and transmission system

Details Cancelling circuit and transmission system Cancelling circuit and transmission system

1991-01-09

1992-08-04

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370 32, 375 76, 379 54, 379402, 358 85, 358143, H04L 514, H04N 714

Patent

active

051365758

ABSTRACT:
The present invention is a transmission system in which there are provided a bridge circuit in which a balanced condition is provided in an entire frequency band usable for a wire transmission line or a portion thereof, and a cancelling circuit in which a simultaneous two-directional communication is enabled by using the same frequency or the frequency adjacent thereto, and there are provided said cancelling circuits at both terminal devices opposite to each other through a transmission line, thereby enabling said simultaneous two-directional communication.

REFERENCES:
patent: 2576115 (1951-11-01), Hill
patent: 3214691 (1965-10-01), Sproul et al.
patent: 3974337 (1976-08-01), Tatsuzawa
patent: 4103118 (1978-07-01), Berman
patent: 4320498 (1982-03-01), Justice
patent: 4331842 (1982-05-01), Kiko
patent: 4377858 (1983-03-01), Treiber
patent: 4670870 (1987-06-01), Hewinson et al.

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