Frequency Drawing Effect of HiTcSC Multivibrator-Type Phase-Memory Switch Module.

A phase memory logic module (PML module, for Short) was constructed, based on a high temperature superconducting core magnetic multivibrator. The phase logic is decided by the majority of multi-input, therefore the same as Parametron logic, and this module has applications in the field of neural network systems. However, the frequencies of oscillation fosc of those PML modules are not exactly the same. Therefore, in this paper, We investigate ways of controling fosc caused by the the frequency drawing effect. By using magnetic interaction between two coils of different modules, the frequencies of two modules f1 and f2 Can be drawn into the same frequency fd. ln this case, the value of fd depends on the phase differences among the oscillations of modules, and is not unique. If a common reference ac current with frequency f0 is applied through coils to each module, f1 and f2 can be drawn into same frequency f0. These frequency drawning effects were analyzed on the basis of the Royer's equation for the mutual inductance of coil.