Method and apparatus for controlling spindle motor to match plural modes of operation in a disk drive
US6753667B2 · kind B2 · utility
17Cited by
9References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Jul 3, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive has an arrangement for controlling the spindle motor and driving the disk contained therein as a function of the mode of operation such as a low acoustic noise mode or a low power consumption rate mode. For normal operation of the disk drive, priority is given to the low power consumption rate mode and the spindle motor is controlled and driven by a rectangular wave drive current. On the other hand, priority is given to the low acoustic noise mode according to a command issued from the host system to the disk drive so as to control and drive the spindle motor by a trapezoidal wave drive current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.