Disk drive employing method of spinning down its spindle motor to reduce the time required for subsequently spinning it up
US6198590A · kind A · utility
130Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1998 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Jul 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive employs a method of operating a spindle motor to respond to a spin-down command to reduce the time required for subsequently responding to a spin-up command. After receiving the spin-down command, and while the rotor continues to spin in the forward-spin direction, a state machine is set to and maintained in a first predetermined register state such that a controlled rotor-stopping operation is performed. At the end of the controlled rotor-stopping operation, the rotor angle is within the range of a peaked forward direction waveform for a second predetermined register state of the state machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.