Methods of demodulating a servo positon error signal on patterned media
US8339722B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2009 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Dec 21, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59655
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems, methods and computer program products for estimating a position of a head in relation to a storage medium are described. A read channel can be used to receive a readback signal containing servo information obtained from a storage medium, and to demodulate the received servo information including position error signals to deduce a position of a read/write head in relation to the storage medium. The read channel can demodulate the received servo information to obtain amplitude and/or phase information. In some implementations, digital sampled values can be generated based on the readback signal, and the digital sampled values can be integrated using an integrator to obtain accurate and reliable amplitude and phase information that are used to determine the position of the read/write head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.