Pulse Response of Ferrite Memory Cores

Abstract

The fourteen basic pulsed voltage outputs of ferrite memory cores are defined and discussed. Photographs are presented. The distinctive appearances of certain outputs are noted. The concept of reversible and irreversible outputs is explained and its application is used in understanding the post-write disturbed method of operating a memory. The principle of operation of a magnetic-core memory is described in order to indicate what sequence of pulses are possible in an array. Based on core response only, the most adverse possible outputs of a plane are presented. Estimates of these outputs for MF-1326-B, F-394, cores are made. Typical values for various core voltage outputs of MF-1326-B, F-394, are given for a driving force of 0.82 amp-turns.