Method of testing bubble memory devices

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365201, G06F 1300, G01R 3312

Patent

active

045920524

ABSTRACT:
A method of testing bubble memory devices each having a plurality of minor loops, the method being useful for detecting defective minor loops in a short time. In this method, data to be written in and/or data to be read out is divided into and stored as a plurality of blocks, the bubble memory device is sequentially operated under driving magnetic field and/or bias magnetic field conditions different for every block, and a defective minor loop or loops are detected by comparing readout data with write-in data.

REFERENCES:
patent: 4221003 (1980-09-01), Chang
patent: 4233668 (1980-10-01), Yamaguchi et al.
patent: 4234935 (1980-11-01), Schreiner
patent: 4400809 (1983-08-01), Whitinger
patent: 4414646 (1983-11-01), Boutin
patent: 4456974 (1984-06-01), Cooper
patent: 4459549 (1984-07-01), Iwasa

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