Polarity encoded pattern for timing based servo
US7130140B1 · kind B1 · utility
21Cited by
8References
17Claims
0Family size
Assignee
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Key dates
| Filing date | May 6, 2002 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Oct 31, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Servo tracks for magnetic tape storage are written using two opposite polarities, rather than the one polarity normally used in servo tracks. Timing continues to be performed using only pattern members of like polarity, due to physical restraints, but the use of two polarities allows additional information to be encoded in the pattern more efficiently.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.