Servo system and method with digitally controlled oscillator
US6122124A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Oct 20, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5926
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An adaptive media speed drive unit for use with a magnetic storage medium, the magnetic storage medium having a timing based servo pattern written thereon, the servo pattern including transitions, the drive unit including a magnetic head including a servo read element configured to read the servo pattern and produce a signal, the signal including recognizable signal events corresponding to the servo read element reading servo transitions; a servo decoder including time capture logic configured to determine the amount of time between the signal events; and a digitally controlled oscillator configured to produce a tracking clock which a write element can use to write data to the magnetic medium with a uniform spacing regardless of magnetic medium speed. A method for producing a tracking clock signal used for writing data in an equally spaced manner to a magnetic medium unit, the magnetic storage medium having a servo pattern written thereon, the servo pattern including transitions, the magnetic medium being movable relative to a magnetic head and the head including a servo read element configured to read the servo pattern and produce a signal, the signal including recognizable signal…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.