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Transmission Line Coupling Arrangement

IP.com Disclosure Number: IPCOM000098132D
Original Publication Date: 1960-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Miano, SV: AUTHOR

Abstract

This is a coaxial line arrangement by which a plurality of drivers may be coupled to a single load or plural loads. Only one of the drivers can be operative at a time.

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Transmission Line Coupling Arrangement

This is a coaxial line arrangement by which a plurality of drivers may be coupled to a single load or plural loads. Only one of the drivers can be operative at a time.

A negative signal applied to the input terminal of the fully shown driver 1 cuts off transistor T(1), allowing T(2) to conduct. This provides an input to the coaxial cable. The voltage drop appearing across resistor R during conduction of T(2) turns on T(3) and T(4) to increase the current supplied to the cable.

The coaxial cable is terminated at both ends in its characteristic impedance. Thus, output of the operative driver divides equally between the terminations regardless of where it is coupled to the line. Each of the OFF drivers appears as a very high impedance in parallel with the coaxial cable and no mismatch occurs. An output may be taken from either or both of the terminations. Other types of transmission lines may be used in place of a coaxial cable.

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