Title :
A current-controlled t.d.m. transmission path
Author :
Leakey, D.M. ; Falconer, J.M. ; Nixon, F.J.
Author_Institution :
General Electric Company, Limited, Research Laboratories, Wembley, UK
fDate :
11/1/1960 12:00:00 AM
Abstract :
The paper deals with the design of a current-operated t.d.m. transmission path suitable for use in an electronic telephone exchange employing 4-wire transmission. Direct replacement of the thermionic valve circuits used in the proposed Highgate Wood exchange with equivalent transistor stages raises difficulties. These are enumerated, and the advantages of current operation are outlined. A detailed description is given of typical circuit-elements including modulators and demodulators. Finally, a brief outline of the performance is included.
Keywords :
automatic telephone systems; telecommunication switching; telephone equipment;
Journal_Title :
Proceedings of the IEE - Part B: Electronic and Communication Engineering
DOI :
10.1049/pi-b-2.1960.0024
