Adaptive read bias

Details Adaptive read bias Adaptive read bias

2006-06-07

2010-02-23

Blouin, Mark (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07667934

ABSTRACT:
A read system for a hard disk drive comprising a disk having magnetic fields. The read system comprises a read element, a bias source, a temperature sensor, and a controller. The resistance of the read element changes based on the magnetic fields. The bias source applies a bias level to the read element. The temperature sensor generates a temperature signal indicative of a head ambient temperature. The controller adapts the bias level based on the temperature signal.

REFERENCES:
patent: 6738216 (2004-05-01), Kawana et al.
patent: 7038870 (2006-05-01), Suzuki et al.
patent: 7460327 (2008-12-01), Iwase
patent: 2003/0043496 (2003-03-01), Kawana et al.
patent: 2004/0212910 (2004-10-01), Suzuki et al.
patent: 2007/0206313 (2007-09-01), Iwase
patent: 2007/0242384 (2007-10-01), Contreras et al.

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