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Delay Line

IP.com Disclosure Number: IPCOM000097603D
Original Publication Date: 1961-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 23K

Publishing Venue

IBM

Related People

Davison, HL: AUTHOR [+3]

Abstract

A section of coaxial cable in series with an unterminated lumped constant delay line provides a fast rising current source for the plate of a thyratron.

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Delay Line

A section of coaxial cable in series with an unterminated lumped constant delay line provides a fast rising current source for the plate of a thyratron.

Thyratron 1 is connected to an input 2 and a load 3. The plate supply includes a voltage source 4, a resistor 5 having insufficient conductance to maintain the plate current, and an open ended delay. The delay consists of a length of coaxial cable 6 in series with a lumped delay line 7. When an input fires the thyratron, plate current is established and maintained until quenched by the action of the delay 6, 7.

Coaxial cable 6 has a desirably fast and smooth discharge, resulting in a fast rise time of the current pulse through it. A long length of such cable yields undesirably high attenuation. On the other hand, the rise times typically obtainable with lumped delay lines alone are undesirably slow for some purposes. By combining a length of coaxial cable 6 with a lumped delay line 7, qualities of each are realized.

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