Energy storage for use in emergency head retraction in disk drives
US6903893B2 · kind B2 · utility
1Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 16, 2003 |
| Grant date | Jun 7, 2005 |
| Priority date | — |
| Expiry date | Dec 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
One embodiment of the present invention is a power source for a disk drive to handle an Emergency Power Off event that includes: (a) a storage capacitor; (b) a voltage source that outputs a first voltage that is applied as input to the storage capacitor; (c) a tester, responsive to the first voltage and a reference voltage; and (d) an adjustable voltage source, responsive to the tester output, that outputs a second voltage that is applied as input to the storage capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.