Apparatus and method for controlling head unload operation in disk drive
US7196863B2 · kind B2 · utility
8Cited by
15References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2004 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | Nov 12, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An actuator supports a head such that the head is movable in a radial direction of a disk. The actuator has a voice coil motor (VCM) used as a driving source for the actuator. A voice coil motor driver (VCM driver) supplies the VCM with a driving current for driving the VCM. During a head unload operation of using the actuator to retract the head to a ramp away from a recording surface of the disk, a driver driving unit drives the VCM driver by a voltage higher than that required for a non-head-unload operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.