Method of controlling stop operation of rotating magnetic field

Static information storage and retrieval – Magnetic bubbles – Rotating field circuits

Patent

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Other Related Categories

G11C 1908

Type

Patent

Status

active

Patent number

045503885

Description

ABSTRACT:
In a magnetic bubble memory device in which magnetic bubbles are propagated under influence of a rotating magnetic field, a method of controlling a stop operation of a rotating magnetic field in which magnetic field is caused to further rotate beyond the stop direction for a predetermined over-rotation angle and is then caused to return to the stop direction which is followed by the removal of the magnetic field, is presented. The over-rotation angle is in a range of 10 to 40 degrees. The invention is applicable whether bubble drive is performed using a drive current of triangular, square or trapezoidal waveform.

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