Disk drive idle mode responsive to flex circuit cable bias changes
US7542225B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2006 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Jan 3, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5552
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is disk drive comprising an actuator including a head, a disk having a plurality of tracks, and a processor to control the movement of the actuator and the head relative to the disk. The processor is coupled to the actuator by a flex circuit cable. The processor commands the application of a pre-calibrated bias signal to the actuator during an idle mode to compensate for a bias force imparted by the flex circuit cable upon the actuator such that the head is maintained proximate a pre-determined track of the disk within a pre-determined idle zone of tracks and further determines if a back electromagnetic force (BEMF) reading associated with the actuator is greater than the threshold value, and if so, commands an exit out of the idle mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.