Feed-forward DC restoration in a perpendicular magnetic read channel
US7602567B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2007 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Apr 10, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10203
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of feed-forward DC restoration in a perpendicular magnetic read channel is disclosed. The method generally includes the steps of (A) generating a feed-forward signal by performing a first detection on an input signal, wherein a DC component of the input signal was previously filtered out in the perpendicular magnetic read channel, (B) generating a restored signal by summing the input signal and the feed-forward signal, the summing restoring the DC component previously filtered out and (C) generating an output signal by performing a second detection on the restored signal, wherein the first detection is independent of the second detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.