Full-duplex digital transmission line system

Details Full-duplex digital transmission line system Full-duplex digital transmission line system

1973-09-24

1976-09-28

Claffy, Kathleen H.

Telegraphy

Systems

Printing

179 2DP, H04L 514, H04B 350

Patent

active

039833232

ABSTRACT:
A finite drive impedance, unbalanced transmission line system for transmitting only the differentiated transitions of a binary level digital signal is disclosed. The transmission line arrangement includes two identical, balanced-bridge transceivers at opposite ends of a coaxial cable whose alternating current (AC) transmission line characteristics are utilized to maintain waveform timing, i.e., the spacing between the differentiated transitions, independent of transmission line length. Integrated circuit (IC) transistor-transistor-logic (TTL) is utilized for the active elements.

REFERENCES:
patent: 1619041 (1927-03-01), Salinger
patent: 3566031 (1971-02-01), Carbone
patent: 3704346 (1972-11-01), Smith
patent: 3730993 (1973-05-01), Moriyasu
patent: 3775561 (1973-11-01), Guckel
patent: 3812292 (1974-05-01), Tink

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