Adjustable writer overshoot for a hard disk drive write head
US6366421B2 · kind B2 · utility
11Cited by
3References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1998 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | Dec 17, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved write drive circuit which provides an adjustable writer drive current and overshoot transient for a H-bridge drive circuit in a hard disk drive. The invention uses a variable capacitor circuit to give an initial boost to the write driver transistors. In a preferred embodiment, the capacitance of the variable capacitor is controlled by a word written to the disk drive pre-amp over the serial control port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.