Signal processing circuit for detecting a tracking error for an

Details Signal processing circuit for detecting a tracking error for an Signal processing circuit for detecting a tracking error for an

1989-01-31

1991-05-21

Envall, Jr., Roy N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4434, 369 4435, 369 54, G11B 7095

Patent

active

050181254

ABSTRACT:
A signal processing circuit for an optical disk apparatus to detect a sine wave tracking error signal obtained when an optical spot on an optical disk moves in a direction of a radius of the optical disk and a sine wave whole reflection light quantity signal having a component of phase offset by 90 degrees relative to that of the tracking error signal and to deform the sine wave whole reflection light quantity signal so that a deformed signal is provided which has states of "H" and "L" selected on timing when the whole reflection light quantity signal traverses a center level of its amplitude.

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