Optical head control circuit for optical tape...

Details Optical head control circuit for optical tape... Optical head control circuit for optical tape...

G - Physics

11

B

352/32.21

G11B 7/12 (2006.01) G11B 7/003 (2006.01)

Patent

CA 2025213

A control circuit for controlling the position of a head in an optical tape recording/reproducing device having a rotary optical head controls the position of the head at the instant that it faces the tape based upon a desired head position derived from a preceding period in which it was facing the tape. A head position error signal is sampled and added to a sample head position signal during a period when the head is facing the tape and is held during the time the head is not facing the tape. The instant the head begins to face the tape once again, this desired value that has been held is applied to the head in order to reduce the pull-in time of the control circuit and provide more time for information recording/reproduction during the time the rotary optical head is facing the tape.

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