부산대학교 도서관

A bubble generator for use in a bubble memory device combines a nucleating generator and replicating generator in a unified structure with first and second hairpins disposed at respective first and second regions to define nucleation and replication sites. The conductor layer is configured such that the same polarity of current flow causes magnetic fields of opposite sense at the nucleation and replication sites. The nucleation site is used only to generate the seed bubble required at the replication site. Once the seed bubble is present, the replication site is utilized to produce the data stream. The nucleation and replication sites are preferably spaced apart with a propagation track extending from the former to the latter, and the first and second hairpins are series-connected with the series connection crossing the propagation path. The hairpins are preferably directed oppositely so that when the rotating field is in the right phase for replication, it is 180.degree. out of phase for nucleation.