Magnetic disc storage apparatus
US6975479B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2002 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Feb 27, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59605
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is provided a technique for controlling drive of a voice coil motor which can select, with priority for effective reduction, any one of heat generation and EMI noise which are presumed to induce a read/write error and for simultaneously realizing the positioning control of magnetic head with higher accuracy during the tracking operation and the high speed access with shortening of the seek operation period. The magnetic disc storage apparatus introducing this technique is provided with a mode to drive with linear control a coil of the voice coil motor from both terminals and a mode to drive one terminal of coil with linear control and the other terminal with pulse width control. Thereby, the coil is driven in the drive mode of linear control during the tracking operation, while one terminal of coil is driven with linear control and the other terminal with pulse width control during the seek operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.