Readback waveform oversampling method and apparatus
US10665254B1 · kind B1 · utility
2Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 2019 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | May 15, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A read channel is configured to obtain an analog readback waveform from a magnetic recording medium of a disk drive at a sampling rate of one sample per one written bit. A buffer is coupled the read channel. Circuitry is configured to inject a plurality of different phase offsets into the read channel for each of a plurality of revolutions of the medium. The circuitry is also configured to store, in a buffer, an amplitude of the readback waveform for each of the different phase offsets. The circuitry is further configured to generate an oversampled readback waveform using the amplitudes stored in the buffer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.