Disk drive servosystem using gray code
US5268800A · kind A · utility
43Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1990 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | Nov 13, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5547
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A servosystem for controlling position of a magnetic head relative to a magnetic storage disk in a disk drive includes first and second feedback loops which provide head position error signals. The first feedback loop includes a head position circuit that processes different recorded Gray coded binary expressions that identify the data tracks on the disk during a track seek mode. The second feedback loop includes a head position circuit which, during the seek and track following modes, processes recorded quadrature servo signals that are interleaved with the data tracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.