Apparatus for inscribing and/or reading a record carrier

Details Apparatus for inscribing and/or reading a record carrier Apparatus for inscribing and/or reading a record carrier

1982-05-27

1989-02-21

Faber, Alan

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

250202, G11B 7095

Patent

active

048072117

ABSTRACT:
An apparatus for recording and/or reproducing information on an optically inscribable and readable disc-shaped record carrier with a previously formed track pattern containing a first track modulation, in order to obtain a clock signal, and a second track modulation formed by a radial wobble, in order to obtain a tracking signal. A reference signal for generating a tracking signal via synchronous detection is derived from the clock signal by frequency synthesis.

REFERENCES:
patent: 4366564 (1982-12-01), Haan
patent: 4375088 (1983-02-01), Haan
patent: 4397010 (1983-08-01), Nabeshima
patent: 4464714 (1984-08-01), Huijsey

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