Method and apparatus for magnetically recording data with three or more states per unit of data
US11495249B1 · kind B1 · utility
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13References
18Claims
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Key dates
| Filing date | Apr 12, 2021 |
| Grant date | Nov 8, 2022 |
| Priority date | — |
| Expiry date | Apr 12, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0018
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Two or more different recording currents are applied to a write coil of a recording head. A first of the two or more currents is a positive current and a second of the two or more currents is a negative current. In response to the application of the two or more different recording currents, a data stream is recorded to regions of a moving continuous magnetic recording medium such that each region has three or more magnetic states. The three or more magnetic states can be read from the continuous magnetic recording medium via a magnetic read transducer to recover the data stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.