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Checking Circuit

IP.com Disclosure Number: IPCOM000098635D
Original Publication Date: 1959-Aug-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Saxenmeyer, GJ: AUTHOR

Abstract

When more than one of ten circuits is energized simultaneously, an error signal is generated by this device. It is applicable in data processing machines where only one driver line in each dimension of a memory matrix is to be energized to select a single memory element.

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Checking Circuit

When more than one of ten circuits is energized simultaneously, an error signal is generated by this device. It is applicable in data processing machines where only one driver line in each dimension of a memory matrix is to be energized to select a single memory element.

The core is normally held in a first state of magnetic remanence by current flow through the bias winding. Each of the coils 0-9 is connected to a different one of the circuits to be monitored. Current flow in any one of these circuits causes the corresponding coil 0-9 to develop a value of magnetomotive force which neutralizes the magnetomotive force developed by the bias coil so that no substantial change in the magnetic state of the core occurs. If two or more of the monitored circuits are energized, the magnetomotive force developed by the corresponding two or more coils 0-9 is sufficient to overcome the magnetomotive force of the bias coil and reverse the direction of magnetic flux in the core. The reversal of magnetic flux in the core induces a potential in coil 10, which is used to signal the error.

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