Using servo data harmonics to monitor head-medium spacing

Details Using servo data harmonics to monitor head-medium spacing Using servo data harmonics to monitor head-medium spacing

2011-05-24

2011-05-24

Tzeng, Fred (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

07948704

ABSTRACT:
A method is disclosed that includes measuring a first amplitude and a second amplitude in a servo pattern signal derived from a transducer head interacting with a medium; and providing an indication of a change in a spacing distance between the head and the medium, wherein the change in the spacing is evaluated using a spacing relation derived from a ratio of the first harmonic amplitude and the second harmonic amplitude.

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