Method of controlling stop operation of rotating magnetic field

Details Method of controlling stop operation of rotating magnetic field Method of controlling stop operation of rotating magnetic field

1984-08-01

1985-10-29

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Rotating field circuits

G11C 1908

Patent

active

045503885

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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