Steuerschaltung fuer Magnetkernspeicher

943,070. Circuits employing bi-stable magnetic elements ; semi-conductor switching circuits. AMP Inc. May 25, 1962 [June 5, 1961], No. 20179/62. Addition to 933,894. Headings H3B and H3T. In a shifting register in which part of the flux of a mufti-apertured core is switched by a priming winding prior to transferring the remanent state to a succeeding core, as described in Specifications 899,336 and 899,367, the priming winding 4 is constantly energized from a D.C. source 5, and the even-to-odd and odd-to-even advance windings 2, 3 are respectively energized by the charge and discharge currents of a condenser 8. Alternate energization of the two advance windings is controlled by a source 19 of alternating pulses the positive and negative half cycles of which respectively cause a four layer diode 22 and 15 to conduct. A resistor 21 stabilizes the potential at the conductive end of diode 15, and the condenser charging circuit comprises an inductance 13 which with windings 2 and 4, resistor 10 and the condenser form a damped resonant circuit. A similar resonant circuit is formed in the discharge circuit by the condenser in association with inductance 25, windings 3 and 4, and resistor 11.