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HF Pulse Train Generator

IP.com Disclosure Number: IPCOM000092081D
Original Publication Date: 1968-Aug-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Frei, AH: AUTHOR [+2]

Abstract

A single pulse fed to the input transmission line of a distributed amplifier with n stages causes a train of n-separated output pulses at the reverse end of the output transmission line. All amplifying elements like field effect transistors 1, 2...n are arranged between input and output transmission lines. Input and output impedances of the amplifying stages are part of the transmission lines. Both lines are terminated with their characteristic impedances Zo.

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HF Pulse Train Generator

A single pulse fed to the input transmission line of a distributed amplifier with n stages causes a train of n-separated output pulses at the reverse end of the output transmission line. All amplifying elements like field effect transistors 1,
2...n are arranged between input and output transmission lines. Input and output impedances of the amplifying stages are part of the transmission lines. Both lines are terminated with their characteristic impedances Zo.

An input pulse traveling down the input line activates the n-amplifier stages consecutively. The output signal at the reverse direction end of the output line is formed by all partial output waves of the n stages traveling backwards. These result in n-separated consecutive pulses if the total delay, i.e., input line, transit time, output line, plus optionally inserted additional delay, between adjacent amplifier stages is sufficiently large.

By proper choice of additional delay elements and by adjusting the individual amplifications of the stages, any desired pulse pattern can be created. The device can be used either as a pulse pattern generator or as a pulse repetition rate multiplier. By individually gating the amplifier stages, a parallel-code to series-code converter is realized.

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