Method and circuit for correcting track zero crossing signal in

Details Method and circuit for correcting track zero crossing signal in Method and circuit for correcting track zero crossing signal in

1994-11-14

1995-10-10

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4432, 369 54, G11B 7085

Patent

active

054576717

ABSTRACT:
In order to correct a track zero-crossing signal TZC generated from a signal detected by an optical head of an optical disk system, an expected edge pulse and a window signal are generated at the position at which the appearance of the edge of the track zero-crossing signal is expected. Among the edge pulses of the actual track zero-crossing signal, only those that exist inside a window are allowed to pass through. When the edge pulses do not exist within the window, the expected pulse is inserted so as to generate a corrected edge pulse, and a corrected track zero-crossing signal is generated from this corrected edge pulse.

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