Write clock rephase for magnetic recording device
US8508879B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2010 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Nov 4, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/252
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure includes systems and techniques relating to control of magnetic recording devices, such as disk drives. A described technique includes producing signals that include a write clock signal and a servo clock signal, processing a waveform produced by a read head operated with respect to a recording medium, which includes magnetic bit cells arranged on tracks, and the servo clock signal. The technique includes producing, based on the waveform, a servo detect pulse that indicates a detection of servo data, measuring a timing difference that is based on the servo detect pulse and a write pulse of the write clock signal, and 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 bit cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.