Method of operating read and write transducers by controlling thermal actuation
US7502205B1 · kind B1 · utility
24Cited by
13References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2004 |
| Grant date | Mar 10, 2009 |
| Priority date | — |
| Expiry date | Jun 29, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A control source and drivers for a thermal actuator fly height controlled heads in a disk drive system includes provisions for driving a heater element to dissipate various levels of power, and thus actuate the head by a desired amount, depending on whether the head is in a write mode or a read mode. Further, overshoot and undershoot are achieved as desired by providing initial values and equilibrium values and through the use of a control capacitor to provide a time constant to the drive signal to the heater element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.