History and signal states in multipath cores

The properties of a transfluxor oscillator used to read continuously analog stored information has been examined for two initial reset procedures. One is a clockwise saturation pulse followed by a counterclockwise dc pulse reversing flux out to the minor aperture. The second is a clockwise saturating pulse followed by an exponentially decaying sinusoid designed to demagnetize the core. A quantitative model is suggested for dealing with the transfer function between applied signal to be stored and resulting oscillator period as a function of the initial flux states, or reset, used. Postulated signal states following the two reset procedures predict the effect of oscillator excitation of the minor aperture and predict in the first case the major portion of the oscillator period-signal curve. The flux switched by the signal is shown to be closely predictable, which means that the period-signal curve itself is a sensitive function of the detailed flux distribution after reset.