Multiple Coincidence Magnetic Storage Systems

Abstract

In existing magnetic matrix storage systems a given location is selected by applying to two intersecting wires a current equivalent to one-half of the selecting field. This situation is generalized so that any core is selected by energizing p wires each with a current equivalent to 1/p of the selecting field. The advantages gained are in the correspondingly smaller fields applied to the nonselected cores, or alternatively, in the faster switching times obtainable by applying a total field greater than the coercive force to the selected core. To obtain the increased selection ratio p—2, additional sets of wires must be introduced into the matrix. Methods for accomplishing this are developed with the aid of a system analogous to plane analytic geometry for a finite set of points. Utilizing the increased selection ratio new fabrication techniques may be employed. Specifically, a storage matrix is illustrated in which the cores are toroids etched from a continuous sheet of magnetic material.