Method and apparatus for performing an open-loop current shaping for seeking acoustics reduction in a disk drive
US6148240A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1998 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | Mar 6, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for reducing overall seeking acoustics in a head-disk apparatus are disclosed. In accordance with one aspect of the present invention, a method for reducing overall seeking acoustics in a disk drive includes sending at least one current command sample to a power amplifier, prior to sending a full scale current command to the power amplifier. A seek current wave form with a smooth, non-linear rise is generated using the power amplifier such that the current command sample. In one embodiment, the full scale current command is arranged to cause the power amplifier to saturate. In another embodiment, the initial rise is a smooth, substantially bi-exponential initial rise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.