Write current switching in a data storage device
US9905251B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2016 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Mar 6, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1426
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for enhancing write current switching efficiencies during data write operations in a data storage device. In some embodiments, write data are described in the form a sequence of symbols of nT length where T is a channel clock rate and n is an integer over a selected range. Bi-directional write currents are applied to a write element to record the sequence of symbols to a storage medium. The write currents are switched between a first rail current and a second rail current for alternating symbols. The write currents are further transitioned to an intermediate current value for at least one channel clock period immediately preceding a next occurrence of a symbol boundary between an adjacent pair of symbols in the sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.