A New Core Switch for Magnetic Matrix Stores and Other Purposes

This paper analyzes the conventional uses of magnetic switch cores to drive matrix stores in both current-driven and voltage-driven modes. A new method of using switch cores is proposed and analyzed which offers, at the cost of replacing in every selection line the usual switch-core and terminating resistor by two smaller cores, intrinsic pulse shaping and amplitude regulation, and much reduced power dissipation, particularly in the driving stages. Constructional details of an application of the new method to drive a store 100×80×10 are given, and waveforms for this store are shown. All address decoding and driving are performed by 34 transistors. A model of a multiple coincidence store 101×101 with a cycle time of 1 μsec has also been constructed; details are given.