Magnetic-Field Design Considerations for a Plated-Wire Memory

Permeable keepers are used in a plated-wire memory to reduce the adjacent bit interference and the current requirement. Computations of a magnetic field have been performed to determine the quantitative effect of the keeper size on the field enhancement in the region where the information is to be stored and on the field reduction outside this region. The field enhancement can be interpreted as the reduction in current for a given magnetic field, and the reduction of the fringing field as the reduction in adjacent bit interference. The numerical results which represent valuable design considerations for a plated-wire memory are presented in graphical form.