Iff Input 0 Input I Output I Output

The memory plates can be used with con ventional 2-to-1 current -coincidence drive. This is particularly suitable for compact, lower power consuming, transistor driven, memories of relatively small capacity. A new method is proposed of driving memories particularly suitable for plates. The memory plates are driven by an end-on switch itself made of plates. The switch operates in a set-a-line and fluxlimited fashion and the memory uses plates in push-pull operated pairs. This results in a mode of operation permitting fast access, large storage capacities, and allowing large tolerances in the timing and amplitudes of driving currents. We ventured to predict 3 years ag0 3 that microsecond random-access memories with capacities reckoned in millions of bits, megabits, would be available at a relatively low cost in a distant future. We believe that the ferrite aperture plate is now ready to usher in the era of such memories. It will follow the present era of core memories with capacities of hundreds of thousands of bits. But the demand for larger and faster memories is incessant,