Browse Prior Art Database

Magnetic Single Shot

IP.com Disclosure Number: IPCOM000097098D
Original Publication Date: 1962-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Potocki, A: AUTHOR

Abstract

This magnetic single shot uses the switching time of a core to determine the pulse width.

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Magnetic Single Shot

This magnetic single shot uses the switching time of a core to determine the pulse width.

The trigger has a two stage tube amplifier, in which tube 1 normally conducts and tube 2 is normally off. A magnetic feedback circuit includes two coils 3 and 4 wound on a common core, not shown. The core is normally saturated by the current flowing through coil 3 from source -V5.

A negative pulse, applied to the first stage at 5, causes a positive pulse to be applied to the second stage grid. Then, this stage becomes conductive and the voltage applied to coil 3 begins to switch the core towards the opposite saturation state. During the switching time, the voltage applied to core 3 remains constant and practically equal to regulated voltage +V4 because of diode 18.

It can be seen that the switching time t is constant, since e = n Delta phi/ Delta t. Therefore, Delta t = n Delta phi/e in which e is the constant voltage applied to coil 3, n is the number of turns around coil 3 and Delta phi is the total flux variation when the core is switched.

The second coil 4 of the core is connected in the grid circuit of tube 1. It allows a feedback to the first stage so that tube 2 keeps conducting after the end of the negative pulse sent to 5. At the end of switching, tube 1 conducts again and the permanent inverse current which flows across coil 3 resets the device.

Condenser 6 and resistor 7 provide a shunt circuit for the input pulses. Diode 8 allows only negativ...