Write clock rephase for magnetic recording device
US8755140B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2013 |
| Grant date | Jun 17, 2014 |
| Priority date | — |
| Expiry date | Aug 9, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/252
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Synchronization technologies for disk drives are described. A described technique includes producing signals that include processing a waveform produced by a read head operated with respect to a recording medium including magnetic data positions arranged on tracks including first and second tracks; producing, based on the waveform, a servo detect pulse that indicates a detection of servo data on the first track; measuring a timing difference that is based on the servo detect pulse and a write pulse of a write clock signal; controlling an adjustment of a phase of the write clock signal based on the timing difference to align the write clock signal with at least a portion of the data positions; and controlling a write head to write to one or more data positions of the second track based on the write clock signal while a servo clock signal is servo locked on the first track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.