reading and recording system for magnetic memory 2 1 / 2d tori

摘要

An organization is disclosed for driving bit lines of 2-wire or 3-wire, 2 1/2D coincident current core memory systems using paired rails for a plurality of bit drive lines, and a separate transformer to energize each pair of rails with opposite polarities for each read or write operation. In a 2-wire system, two conjugate lines connected to one rail of a pair and associated with a given bit position of separate word groups are connected to two conjugate lines connected to the other rail of a pair and associated with an adjacent bit position of the same word groups through a selection switch connecting single output terminals of baluns at the ends of the conjugate lines so that current through two conjugate lines is returned through the other two conjugate lines. In a 3-wire system, a single bit line connected to one rail is connected to a single line connected to the other of a pair of rails by a selection switch for the same purpose.