Conductor access bubble memory arrangement
AssigneeBell Telephone Laboratories, Incorporated
InventorAndrew H. Bobeck
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Abstract
Continuous film type, current-access bubble memories are designed for low power operation by including, along the current paths, areas of reduced width. The areas of reduced widths are characterized by relatively high current densities, which are preferred, for example, for expansion detected or operation, without an increase in power consumption.
Claims10
A magnetic bubble memory comprising a host layer (11) of a material in which magnetic bubbles can be moved, and means (16,17,M.sub.1 . . . M.sub.N,13,22) for moving magnetic bubbles in the layer, the means comprising at least one continuous layer (16) of electrically-conducting material for providing a current path for pulses (see FIG. 3) impressed therein and means (M.sub.1 . . . M.sub.N and 13) for defining a periodic pattern of magnetic field gradients in response to the pulses, the memory being characterized in that the overall width of the current path is sufficiently different in at least first and second areas (to the left of line 30 and to the right of line 31 in FIG. 1) to provide substantially different current densities in response to each of the current pulses.
A magnetic bubble memory comprising a host layer of a material in which magnetic bubbles can be moved, and at least a first layer of electrically-conducting material coupled to said host layer and adapted for providing a current path in said first layer, said first layer including therein an area in which the width of said current path is reduced from relatively wide to narrow, said area including apertures arranged in a partial sunburst pattern having ends relatively close together where said current path is narrow.
Dependencies are inferred from the claim text.