Reverse write current preshoot
US7796355B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2006 |
| Grant date | Sep 14, 2010 |
| Priority date | — |
| Expiry date | Apr 14, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods of generating a write current in response to a write command include generating a reverse preshoot write current having a polarity opposite to a polarity for generating a magnetic transition corresponding to the write command, and then generating a write current to effect the magnetic transition corresponding to the write command. The write current may be used for writing data to a storage disk of a disk drive that includes a write head configured to apply a magnetic field to the storage disk responsive to write currents. A preamplifier circuit includes a write current generator configured to receive a write current command and configured to generate, responsive to the write current command, a reverse preshoot current having a first polarity that is opposite a second polarity for generating a magnetic transition corresponding to the write command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.