Head polarity detection algorithm and apparatus
US7133227B2 · kind B2 · utility
19Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2004 |
| Grant date | Nov 7, 2006 |
| Priority date | — |
| Expiry date | Jul 11, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of determining and monitoring head polarity of data heads comprises performing a head polarity detection routine. The head polarity detection routine comprises the step of setting a read gate period duration to a first value. The routine also comprises searching for a good address mark signal during a first read gate period with a channel polarity set to a first polarity. The routine further comprises identifying a polarity of a data head based upon the channel polarity when the good address mark is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.