Magneto-inductive readout of cross-tie wall memory system using bipolar, asymmetrical, hard axis drive fields and long sense line
US4024515A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1975 |
| Grant date | May 17, 1977 |
| Priority date | — |
| Expiry date | Aug 28, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C19/0866
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The method of and a configuration for reading out the information that is stored in a cross-tie wall memory system is disclosed. The apparatus utilizes: a continuously, relatively long, sense line that is aligned along and straddles the cross-tie wall; a first polarity hard axis drive field H.sub.Tt that passes, if in existence, a stored-1-representing-Bloch-line from a memory segment along the cross-tie wall into, along and past the continuous sense line; a second polarity hard axis drive field H.sub.Tn that nucleates many Bloch-lines at once along the cross-tie wall in the area of the sense line for causing the nucleating Bloch-lines to induce in the sense line an output signal that is indicative of the change in polarity of the Neel wall vectors within the cross-tie wall in the area of the sense line and, accordingly, whether or not a stored-1-representing-Bloch-line had been stored previously in the memory segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.