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Pulse Train Generator

IP.com Disclosure Number: IPCOM000094477D
Original Publication Date: 1965-Feb-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Miano, SV: AUTHOR

Abstract

By employing delay lines, a continuous, even plurality of output pulses of predetermined duration is generated from a single square-wave input having a duration equal to the combined durations of the output pulses.

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Pulse Train Generator

By employing delay lines, a continuous, even plurality of output pulses of predetermined duration is generated from a single square-wave input having a duration equal to the combined durations of the output pulses.

In a generalized pulse train generator, the number N of discrete delay lines that is required to produce P output pulses in the duration T of an input square wave is determined from the formula N = (P/2) - 1. The amount of delay required for each of the delay. lines is equal to the pulse width of each of the P output pulses. Therefore, the pulse width of each of the output pulses is equal to T/P.

A specific form of generator for producing a series of four output pulses requires the use of inverters 1 and 2, delay line 3 and four And's 4...7. An input square wave A having a total cycle duration of B is supplied to the circuit. Inverter 2 provides A and the input wave is delayed by the delay line 3 to provide AD. The inverse of AD is provided by inverter 2. By logically combining these signals in And's 4...7, the outputs 1...4 are realized.

In this pulse train generator, the beginning of one input pulse is prevented from occurring until the preceding output pulse has terminated despite any asymmetry of the input square wave.

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