Magnetic head position control apparatus

Details Magnetic head position control apparatus Magnetic head position control apparatus

G - Physics

11

B

352/21.3

G11B 5/58 (2006.01) G11B 11/10 (2006.01) G11B 11/105 (2006.01) G11B 21/02 (2006.01) G11B 21/21 (2006.01)

Patent

CA 2023698

A magnetic head position control apparatus for driving the magnetic head of a disk recording apparatus toward or away from the recording surface of a magneto-optical disk to effect position control of the magnetic head. Changes in the distance between the magnetic head and the magneto-optical disk are detected from changes in capacitance between a capacitance detection electrode mounted on the magnetic head and a surface of the magneto-optical disk. An oscillator circuit connected to the capacitance detection electrode varies its oscillation frequency in response to changes in capacitance and detects such frequency variations and controls the position of the magnetic head for maintaining it at a constant predetermined distance from the magneto-optical disk.

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