Disk drive employing pulse width modulation of head control signal
US8482873B1 · kind B1 · utility
111Cited by
62References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2008 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Sep 26, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6029
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a plurality of disk surfaces, and a plurality of heads actuated over the respective disk surfaces. In one embodiment, control circuitry generates a pulse duty cycle signal for one of the heads. In another embodiment, the control circuitry generates a first pulse width modulated signal for a first head, and a second pulse width modulated signal for a second head, wherein the second pulse width modulated signal comprises a phase offset from the first pulse width modulated signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.