Implementing spin-torque oscillator sensing with enhanced demodulator for hard disk drives
US8654465B2 · kind B2 · utility
36Cited by
2References
14Claims
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Key dates
| Filing date | Dec 9, 2011 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Apr 30, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2516
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method, apparatus, and system are provided for implementing spin-torque oscillator (STO) sensing with a demodulator for hard disk drives. The demodulator measures an instantaneous phase of the readback signal from a STO sensor and converts the readback signal into a signal that is proportional to the magnetic field affecting the STO frequency during a bit time. The converted signal is used for processing by conventional data detection electronics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.