Compensation for different transducer translation path geometries
US8154817B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 2009 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Feb 20, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/08582
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for compensating for differences in translation path geometries of transducers used to access a data storage medium. A compensation profile is generated in relation to radial error between a first translation path geometry of a first transducer and a different, second translation path geometry of a second transducer. A control circuit directs the first transducer to write data to a rotatable data storage medium in relation to the compensation profile to emulate the second translation path geometry. In some embodiments, the control circuit comprises a data signal clock generator, a motor rotation clock generator, and a transducer radial translation clock generator. A nearest pulse detector identifies a closest clock signal pulse to a once-per-revolution (OPR) rotational reference, and the control circuit adjusts a frequency of the associated clock signal coincident with the closest pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.