Capacitive clearance detection for a magnetic head
US8837070B1 · kind B1 · utility
13Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2013 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Apr 22, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6017
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A modulated signal of a predetermined frequency is applied to a capacitive sensor of a magnetic head. The capacitive sensor is located proximate to a media-facing surface of the magnetic head. A clearance between the magnetic head and a magnetic medium is determined using a response to the modulated signal at the predetermined frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.