Disk drive having a sector clock that is synchronized to the angular speed of the spindle motor
US7126776B1 · kind B1 · utility
195Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2002 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | Aug 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/596
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention compensates for variations in the angular velocity of the drive's spindle motor by periodically dropping clocks to a counter based upon the previous servo wedge-to-wedge timing. This enables a substantially constant count to be maintained between servo wedges and allows a more predictable generation of the data sector pulses. A more predictable generation of the data sector pulses enables the size of the guard band preceding each data sector to be decreased and the capacity of the disk to be correspondingly increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.