Pulse-mode writer
US6493161B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1999 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Dec 31, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/09
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pulse-mode data writing protocol is disclosed which reduces the time required to implement a transition in the direction of magnetization of a recording medium, and which reduces the total power required to encode a given data sequence. After a magnetic transition is encoded on the medium by generating a write current pulse through the write head, the write current through the recording head is reduced, thereby utilizing the spatial extent of the write bubble to encode the lack of a transition on the medium. Alternate configurations are disclosed for various scenarios of write bubble size versus maximum cell size, all utilizing the principle of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.