Browse Prior Art Database

Bubble/Bubble Interaction Logic Devices

IP.com Disclosure Number: IPCOM000089411D
Original Publication Date: 1977-Oct-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Kryder, MH: AUTHOR

Abstract

This improved bubble domain logic gate utilizes the fact that the bubbles interact via the soft magnetic material used to define the device structure and therefore interact more strongly than via pure magnetostatic interaction through nonmagnetic media.

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Bubble/Bubble Interaction Logic Devices

This improved bubble domain logic gate utilizes the fact that the bubbles interact via the soft magnetic material used to define the device structure and therefore interact more strongly than via pure magnetostatic interaction through nonmagnetic media.

One design employing this concept is shown. In this design bubbles approaching the Y-bar (1) from paths I(1) and I(2) interact, producing an output at 0(1) which corresponds to the logical OR function and an output at 0(2) which corresponds to the logical AND function. The device operation is as follows. If bubble 1 is in path I(1) at position A but there is no bubble in path I(2) in position D, then bubble 1 will propagate along path 0(1) with clockwise rotation of the field. Alternatively, if bubble 2 is at D, but there is no bubble at A, then bubble 2 will propagate out path 0(1). If bubbles exist at both A and D, then the bubbles will propagate along both paths O(1) and O(2). This proceeds as follows: As the field rotates from 1 to 2, bubble 1 will move to position B while bubble 2 moves only slightly from D to D'. When the field rotates to position 3, bubble 1 will move to C and bubble 2, because of the interaction with bubble 1, will not propagate to C but will instead pass to E. With further rotation of the field bubble 1 will exit out path O(1) and bubble 2 will exit out path O(2). Obviously, if there is neither a bubble at A or B, no bubble will appear at O(1) or O(...