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Multiple Input Magnetic Bubble "AND" Gate

IP.com Disclosure Number: IPCOM000076931D
Original Publication Date: 1972-May-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Sakalay, FE: AUTHOR

Abstract

Magnetic domain bubble technology inherently lends itself to the interaction of two bubbles. Two input AND and OR gates commonly use such interaction. The AND gate shown in the figure is readily extendable to any desired number of inputs, by utilizing the simultaneous interaction of multiple magnetic bubble domains.

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Multiple Input Magnetic Bubble "AND" Gate

Magnetic domain bubble technology inherently lends itself to the interaction of two bubbles. Two input AND and OR gates commonly use such interaction. The AND gate shown in the figure is readily extendable to any desired number of inputs, by utilizing the simultaneous interaction of multiple magnetic bubble domains.

The bubbles shown in the figure are located at their respective points of interaction. Each bubble previously has followed a respective path from input points A through E in response to the usual in-plane rotating magnetic field. There is no significance to the lengths of the respective paths shown in the figure, it being required only that the magnetic bubble data sources, not shown, and the respective path lengths be designed so that the corresponding magnetic bubbles arrive at the indicated interaction points simultaneously.

With the exception of input bubble E, each bubble has a choice of two directions subsequent to its interaction point. The bubbles either can move to point 2 (in the absence of bubble interaction) or be forced to point 2' (in the presence of bubble interaction). Bubble E, if present, can move only to position 2. Thus, bubble E pushes bubble B to its 2' position, bubble D pushes bubble C to its 2' position, and so on, whereby bubble A is pushed to its 2' position to provide an output. If any input bubble other than E is absent from its interaction point, the pushing action does not pass t...