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US 12,499,907 B2Granted
Systems for and methods for mode hop detection in heat assisted magnetic recording
AssigneeAvago Technologies International Sales Pte. Limited
InventorsGregory Wayne Starr, Donald Charles Grillo
Life of this patent
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Abstract
Mode hop detection is provided. A device includes circuitry to receive, from a reader element an indication of one or more properties of a magnetic medium detected by the reader element. The device includes circuitry to determine an envelope of the signal. The device includes circuitry to adjust, responsive to the envelope, a current provided to a laser configured to heat the magnetic medium.
Claims19
A device comprising circuitry configured to:
- receive, from a reader element, a signal, the signal comprising an indication of one or more properties of a magnetic medium detected by the reader element, wherein the signal comprises an indication of a value of one or more bits stored on the magnetic medium;
- determine an envelope of the signal;
- and
- adjust, responsive to the envelope, a current provided to a laser configured to heat the magnetic medium.
1 more element
A method comprising:
- receiving, from a reader element, a signal comprising an indication of one or more properties of a magnetic medium detected by the reader element, the one or more properties comprising a direction of magnetic polarization corresponding to a bit value and a magnitude of the magnetic polarization;
- determining an envelope of the signal;
- and
- adjusting, responsive to the envelope, a current provided to heat the magnetic medium.
1 more element
A system, comprising:
- a magnetic medium;
- a laser diode;
- a reader element;
- and
- a controller configured to:
- receive, from the reader element, an indication of one or more properties of the magnetic medium detected by the reader element;
- and
- adjust, responsive to the indication and using components disposed along a same movable arm as a laser driver configured to heat the magnetic medium, a current provided to the laser diode, the laser diode configured to heat the magnetic medium.
5 more elements
Dependencies are inferred from the claim text.