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Magnetic Core Matrix Adder

IP.com Disclosure Number: IPCOM000098715D
Original Publication Date: 1959-Oct-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Vogl, NG: AUTHOR

Abstract

The adder is adapted to simultaneously add three numbers, namely, an addend, an augend and a carry in. The circuitry shown is designed for operation with the ternary number system.

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Magnetic Core Matrix Adder

The adder is adapted to simultaneously add three numbers, namely, an addend, an augend and a carry in. The circuitry shown is designed for operation with the ternary number system.

There are two cores in every coordinate position of the matrix. The upper core in each pair represents the sum of addend, augend and 0 carry in, and the lower core represents the sum of addend, augend and 1 carry in. The addend and augend drive lines pass twice through the matrix to couple both cores of each pair. The 0 carry in line couples the upper core of every pair and the 1 carry in line couples the lower core of every pair. Sum and carry out sense lines (only one of which is shown) are threaded through the matrix to provide the sum and carry outputs. Each sum or carry line couples all cores representing the same sum or carry. The cores are of the square hysteresis loop type and the drive lines are energized with currents of one third the amount required to switch a core. Addition is performed by energizing one each of the addend, augend and carry in lines. The three energized lines intersect in only one core, and only that core is switched to provide an output on the sum and carry sense lines.

While the matrix shown is designed for operation with ternary numbers, it may be altered to adapt it for other number systems.

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