Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1991-11-15
1992-12-15
Brier, Jeffery A.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 32, 369 47, 369 4425, 360 7702, G11B 700
Patent
active
051723530
ABSTRACT:
A track seeking control apparatus includes an optical head for generating a signal comprising a train of track cross pulses when it crosses tracks on a recording medium. A first counter counts the train of track cross pulses generated by the optical head, and produces a signal representative of a count value of the first counter. A signal generator generates a signal of a frequency varying proportional to a frequeny of the track cross pulse signal. A second counter counts the train of track cross pulses generated by the optical head, based on the output signal of the signal generator, and produces an output signal when a count by the second counter reaches a desired value. A second pulse generator outputs to the first counter a correcting pulse for correcting the count value of the first counter, in response to the output signal produced by the second counter.
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Brier Jeffery A.
Olympus Optical Co,. Ltd.
Truong Khoi
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