Magnetoresistive head bias current switching based on skew angle
US5615063A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1995 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | May 22, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0018
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A controller 40 of an HDC 30 is connected to a drive 28, and an arm is rotated through a predetermined angle. A magnetic head 20 on the arm comprises a recording element and a reproduction element. A bias current is supplied to the magnetic head 20 from the controller 40 through a driver 36A and a switching circuit 32A, and the magnetic field of the disk 18A is detected in a detector 38A through a switching circuit 32A. The switching circuit 32A inverts the polarity of a current applied to the magnetic head 20A, by a signal from the controller 40 corresponding to a skew angle. Accordingly, the direction of the bias magnetic field is changed, the effective sensitivity position of the reproduction element approaches the recording element, and off-track can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.