Coincident-Current Nondestructive Readout from Thin Magnetic Films
Lewis J. Oakland, Thomas D. Rossing · Journal of Applied Physics · 1959
By using cores which consist of two-vacuum-deposited ferromagnetic films it is possible to build memory arrays from which data can be read out nondestructively by use of coincident-current selection. It is thus possible to eliminate the external selection matrices commonly associated with nondestructive readout memories. This system promises to be inexpensive, reliable, and fast, especially in a memory in which read operations occur more frequently than write operations. Three different devices are described which fulfill the criterion of coincident-current nondestructive readout. Good signal to noise has been achieved with each of these.