Method of generating a position error signal, method of writing a data track, and method and apparatus for testing a head
US8243382B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 6, 2007 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Jun 26, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/455
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of generating a position error signal for a desired radial position of a read/write head relative to a data track of a disk is disclosed. The track has a plurality of servo bursts defining a plurality of servo nulls for the track, and are positioned such that they are at more than four different radial positions relative to the track, and define a predetermined locus having a known position relationship with the track. The method comprises determining a target null position on the null locus corresponding to the radial position of the head relative to the track; detecting the position of the servo null with the head; determining from the detected servo null position the position error of the head relative to the target null position; and, generating a position error signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.