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US 11,257,519 B2Granted
Thermal compensation for heat assisted magnetic recording
AssigneeMarvell Asia Pte Ltd
InventorsMats Oberg, Hao Fang
Life of this patent
Estimating the term…
Abstract
A system includes a driver and a controller. The driver is configured to output a signal to a preamplifier of a heat source based on a thermal compensation value to cause the heat source to heat a spot on a storage medium. The controller is configured to adjust the thermal compensation value based on a duration for which the heat source is in an active or inactive operational state. The thermal compensation value is indicative of a history of durations that the heat source was in the active or inactive operational state.
Claims20
A system comprising:
- a driver configured to output a signal to a preamplifier of a heat source based on a thermal compensation value to cause the heat source to heat a spot on a storage medium;
- and
- a controller configured to adjust the thermal compensation value based on a duration for which the heat source is in an active or inactive operational state, the thermal compensation value indicative of a history of durations that the heat source was in the active or inactive operational state.
A storage drive comprising:
- a preamplifier coupled to a heat source;
- a read channel including:
- a driver configured to output a signal to the preamplifier based on a thermal compensation value to drive the heat source to heat a spot on a storage medium;
- and
- a controller configured to adjust the thermal compensation value based on a duration for which the heat source is in an active or inactive operational state, the thermal compensation value indicative of a history of durations that the heat source was in the active or inactive operational state;
- and
- a write head configured to apply, while the spot is heated, a magnetic field to the heated spot to write data to the storage medium.
4 more elements
A method comprising:
- measuring a duration for which a heat source that heats a spot on a storage medium is in an active or inactive operational state;
- adjusting a thermal compensation value based on the duration that the heat source is in the active or inactive operational state, the thermal compensation value indicative of a history of durations that the heat source was in the active or inactive operational state;
- and
- driving the heat source based on the thermal compensation value to heat the spot on the storage medium.
1 more element
Dependencies are inferred from the claim text.