Method and apparatus for separating magnetic and thermal components from an MR read signal
US6088176A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 1996 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Jan 2, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for reading an information signal from a magnetic storage medium using a magnetoresistive (MR) head, and separating a thermal signal component and, if present, a magnetic signal component from the information signal. A signal separation/restoration module eliminates distortion in the magnetic signal component of a readback signal induced by a thermal signal component of the readback signal. A finite impulse response (FIR) filter may be employed in the signal separation/restoration module to eliminate the distortion in the magnetic signal. The signal separation/restoration module may be employed to extract the thermal signal component from the readback signal. In one configuration, an MR head is coupled to an arm electronics (AE) module, having a highpass filtering behavior, and a signal separation/restoration module that includes an inverse filter having a transfer function inverse to that of the effective highpass filter of the AE module. The inverse filter may be an infinite impulse response (IIR) filter. In another embodiment, the magnetic and thermal signal components of a readback signal are respectively extracted and processed so as to linearly corresp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.