Pick-up device positioning arrangement in an information disc pl

Details Pick-up device positioning arrangement in an information disc pl Pick-up device positioning arrangement in an information disc pl

1982-04-21

1985-10-01

Psitos, Aristotelis M.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

369 44, G11B 700, G11B 2110

Patent

active

045450030

ABSTRACT:
An information reading and reproducing apparatus in which a recording disc having an information-carrying face formed with recorded tracks is to be driven for rotation and which includes drive means operative to drive a signal pick-up means for movement radially of the disc at a velocity controlled by a velocity control device and to produce signals indicative of the locations of the pick-up spot relative to the tracks on the disc in a radial direction of the disc, the velocity control device comprising velocity detecting means operative to extract from said signals information indicative of the velocity of movement of the signal pick-up means with respect to the disc.

REFERENCES:
patent: 2915315 (1959-12-01), Rabinow
patent: 3449833 (1969-06-01), Dzula
patent: 3688410 (1972-09-01), Zeidler et al.
patent: 4135086 (1979-01-01), Baba
patent: 4268745 (1981-05-01), Okano
patent: 4318142 (1982-03-01), Ravizza
patent: 4320493 (1982-03-01), Kikuchi et al.
patent: 4322836 (1982-03-01), Kinjo et al.
patent: 4338682 (1982-07-01), Hosaka et al.
patent: 4340950 (1982-07-01), Kosaka

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