Ferrite apertured plate memories

WITH THE INCREASED demand for larger and faster memories, techniques are required which reduce fabrication cost and simplify circuitry. With very large coincident-current memories, the resulting back voltage due to half-selected cores will often exceed the drive capabilities of the associated transistor circuitry. This will in turn require the memory to be split between duplicate sets of drivers. The ferrite plate memories, because of their compactness and smaller effective core size, allow much larger memory arrays to be driven from a single set of drivers. In addition, the simplified fabrication gives considerable cost advantages.