Head controller, storage device, and head controlling method

Details Head controller, storage device, and head controlling method Head controller, storage device, and head controlling method

2007-08-23

2009-11-17

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S060000

Reexamination Certificate

active

07619847

ABSTRACT:
A level peak-acquiring unit acquires a peak of a signal level during a calibration wherein a heater power is increased from zero to a predetermined power. A sample acquiring unit acquires in a sampling range, a sample of a combination of the heater power and the signal level. A linear function-determining unit determines a linear function that approximates from the sample, a relation between the heater power and the signal level. Based on the peak of the signal level and the linear function, a control Touch Down Point (TDP)-calculating unit calculates the heater power corresponding to the peak of the signal level and treats the calculated heater power as a control touchdown point. Then, the control TDP-calculating unit uses the control touchdown point to convert into a linear function of the heater power and spacing, the linear function of the heater power and the signal level.

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