Fast access magnetic bubble memory
US4530071A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1983 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | Nov 10, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C19/0875
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A magnetic bubble memory that can be read during every cycle of an in-plane drive field includes first and second minor loop sets into which alternate bits of a bubble pattern are stored. Two bubble generators are used to generate a sequence of bubbles in each of two associated lines for later movement to first and second write lines associated with the two minor loop sets, respectively. Swap functions are defined between each write line and the associated line and are operative in a push-pull manner to selectively move bubbles into alternative locations of each of the write lines. Later controlled movement of bubble patterns to selected locations in the minor loop sets results in permanent storage for later integration into a single read line for permitting "read-on-every-cycle" operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.