Method for measuring holding field of a magnetic bubble memory module using picture-frame-core.

摘要

According to one embodiment of the present invention, holding field (Hdc) margin is measured by AC driving (Fig. 46, t1 SIMILAR t0, Ip) one of X and Y coils (COI) for applying rotating magnetic field (Hr) to a bubble memory chip (CHI), thereby preventing the magnetic field generated by the one coil from passing through the magnetic short-circuit which is comprised of homogenizing plate (HOM) or shield cases (SHI) of high permeability outer the confining case (RFS).