JPS5651079A - Magnetic bubble storage device - Google Patents

Abstract

PURPOSE: To obtain a magnetic bubble storage device fast in the access time, by making different the number of bit cells of minor loop depending on the frequency.

CONSTITUTION: A series of magnetic bubbles produced at a bubble generator 1 with developed signal current pulses are transferred to an information frequency gate 12 via a write-in major loop 2 with the in-surface rotating magnetic field. This gate 12 is controlled in response to the readout frequency information, and the bubbles corresponding to the information transferred are written in a minor loop 8 with many frequencies and a minor loop 9 with a few frequency respectively via a write- in major loop 10 with many frequencies and a write-in major loop 11 with a few frequency. Since the loop 8 is less in the bit cell number in comparison with the loop 9, the access time is shorter than that of the loop 9, and the magnetic bubble storage device with faster access time can be obtained with the constitution different from the number of bit cells depending on the readout frequency.

COPYRIGHT: (C)1981,JPO&Japio