BI-DIRECTIONAL MAGNETIC DOMAIN TRANSFER CIRCUIT

摘要

1456774 Magnetic bubble switching SPERRY RAND CORP 31 Oct 1974 [9 Nov 1973] 47163/74 Heading H3B In a magnetic memory bubbles are transferred between a major and plural minor loops by two magnetically soft linking elements D, E and a serpentine transfer conductor B which contacts once each soft magnetic element that it crosses. The bubbles are propagated by an in-plane rotating field H R which normally drives bubbles leftwards across T and I bars A-G forming part of the major loop but may be transferred to minor loops formed by H and I bars such as H-J by the application of a current pulse to the conductor when the field H R is between compass positions 3 and 4 to switch the bubbles to element D. Similarly, bubbles are switched back to the major loop by element E when a current pulse is applied at the time H R is between positions 1 and 2. The conductor is of gold electrodeposited directly over the elements.