Determining fly height using readback signal distortion
US11881239B1 · kind B1 · utility
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5References
19Claims
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Key dates
| Filing date | Apr 29, 2022 |
| Grant date | Jan 23, 2024 |
| Priority date | — |
| Expiry date | Apr 29, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/607
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A controller extracts a distortion component of a readback signal from a magnetic read head. The distortion component may be found using a finite length Volterra series, for example. The controller estimates a clearance between the read head and a recording medium based on the distortion component. This clearance measurement can be used for closed loop fly-height control of the read head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.