Magnetic data card servo writer
US6417980B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1999 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Apr 9, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/53
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention discloses a magnetic servo writer. The magnetic servo writer includes a magnetic pickup head for rotationally moving over and writing servo data in a magnetic flat data-storage medium. The magnetic servo writer further includes a clock head for providing clock signals to the pickup head and to write clock signals in the clock disk. The magnetic servo writer further includes a control circuit for controlling the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium. The magnetic servo writer further includes a servo pattern layout circuit for controlling the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium with predefined servo patterns. The magnetic servo writer further includes a derived index control circuit for deriving indices from a fixed index provided on the magnetic flat data-storage medium. The magnetic servo writer further includes a fixed index and clock track circuit for providing a fix index and a clock signal for controlling the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium. The magnetic servo writer further includes a head move circuit …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.