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Drivable Large VI Product Bubble Memory Coil

IP.com Disclosure Number: IPCOM000049434D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09

Publishing Venue

IBM

Related People

Authors:
Mortelmans, J [+details]

Abstract

A bifilarly wound coil having twice the VI product of a single original coil is driven with two sets of original drivers. The VI product is proportional to both frequency and coil volume. A bifilar coil is one consisting of two interturned coils so that adjacent turns belong to two separate but magnetically coupled coils, each having two terminals. The use of a bifilar coil extends bubble memory performance in that it permits operating the bubble memory at twice the rotating field frequency or increasing the number of chips in the module.