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A Magnetic Core Code Validity Checking Circuit

IP.com Disclosure Number: IPCOM000097562D
Original Publication Date: 1961-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Eichelberger, EB: AUTHOR

Abstract

This circuit checks an m out of n type code, e. g., a 2 out of 5 code. When utilizing such a code, each of the five inputs lines is wound on a selected one of the cores in a group, five cores being in a first group 1 and five cores being in a second group 2. The input lines are wound in one direction on the cores in group 1 and in the other direction on the cores in group 2. A sense winding is wound on the ten cores and has two turns on each of the cores in group 1 and three turns on each of the cores in group 2.

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A Magnetic Core Code Validity Checking Circuit

This circuit checks an m out of n type code, e. g., a 2 out of 5 code. When utilizing such a code, each of the five inputs lines is wound on a selected one of the cores in a group, five cores being in a first group 1 and five cores being in a second group 2. The input lines are wound in one direction on the cores in group 1 and in the other direction on the cores in group 2. A sense winding is wound on the ten cores and has two turns on each of the cores in group 1 and three turns on each of the cores in group 2.

To initiate operation of the circuit, a set line sets the cores in group 2 to one condition. A valid 2 out of 5 code causes two out of the five input lines to be energized to affect the associated cores. Hence, when the readout winding is energized to reset the cores, the voltages induced in the sense line by the cores in group 1 cancel the voltages induced in the sense line by the cores in group 2 and there is no output. However, when other than 2 out of 5 input lines have been energized, there is a resultant voltage induced in the sense line and, therefore, an output, consequently indicating an error condition.

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