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Adaptive Logic Utilizing Magnetic Drum Storage

IP.com Disclosure Number: IPCOM000096699D
Original Publication Date: 1963-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Akmenkalns, IG: AUTHOR

Abstract

Rotating drum 3 has a magnetizable surface. It has a number of tracks equal to the number of decision or adaptive circuits required, such as k bands or tracks, three of which are shown designated as B1, Bk-1 and Bk. Assuming that each of the decision circuits has n inputs, each track is divided into n + 1 sections. Each section is partially magnetized with the flux proportional to the desired weight. Thus, sections are magnetized as shown by W1, W2, and the extra section is magnetized to a threshold value T. A plurality of read heads, one for each track, such as R1, Rk-1 and Rk have voltages induced in them by the flux of the weighted sections.

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Adaptive Logic Utilizing Magnetic Drum Storage

Rotating drum 3 has a magnetizable surface. It has a number of tracks equal to the number of decision or adaptive circuits required, such as k bands or tracks, three of which are shown designated as B1, Bk-1 and Bk. Assuming that each of the decision circuits has n inputs, each track is divided into n + 1 sections. Each section is partially magnetized with the flux proportional to the desired weight. Thus, sections are magnetized as shown by W1, W2, and the extra section is magnetized to a threshold value T. A plurality of read heads, one for each track, such as R1, Rk-1 and Rk have voltages induced in them by the flux of the weighted sections. The read heads are gated sequentially by inputs supplied to a corresponding plurality of coincidence circuits 7 to supply the required weights to a corresponding plurality of integrating circuits 9.

The magnetization of the threshold section is such that it subtracts from the integrated values of the input weights W1, W2, etc. After all signals are read, the integrated values are supplied from integrators 9 through coincidence gates 11 to a corresponding plurality of threshold detectors 13. These supply outputs if the integrated value is greater than the required threshold.

The adaptation or weight changing operation is accomplished by supplying energy of one polarity or the other to a plurality of adapt heads A1, Ak-1 and Ak. If an increase of weight is desired, the signal ha...