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Adaptive Logical Device

IP.com Disclosure Number: IPCOM000097772D
Original Publication Date: 1961-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Newman, EG: AUTHOR

Abstract

This is a logical device of the type which is adaptable to provide a variety of functions of the input variables. It provides for highly versatile and efficient computer operations.

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Adaptive Logical Device

This is a logical device of the type which is adaptable to provide a variety of functions of the input variables. It provides for highly versatile and efficient computer operations.

The matrix of ferrite toroids 10 (top drawing) performs all logical functions of the input variables A and B. The windings 12 are selectively activated by the input variables and, when activated, magnetically saturate the toroids through which they pass. The particular function to be performed is selected by indexing to a position adjacent the matrix a predetermined pattern of magnetic fields 14 recorded on a barium ferrite sheet 16. Those toroids adjacent a magnetic field recorded on the barium ferrite sheet are magnetically saturated.

Each toroid of columns 1...4 of the matrix is wound serially by a drive winding
20. Drive windings 20 are connected in a parallel network. A resistor 22 connects an input terminal 18 to a termination 24 of the parallel network, and the output signal is taken at termination 24. The other end of the parallel network is grounded.

The matrix is sensed by applying a signal at input terminal 18.

If all toroids in any one column are magnetically saturated by the combination of the function pattern (magnetic fields 14) and input variable windings, e. g., A, bar A, bar B, etc., the impedance of the winding 20 in that column is very low. The output terminal is then maintained at a potential near ground, when the input signal is applied be...