Optical head transfer circuit, optical head and reproducing appa

Details Optical head transfer circuit, optical head and reproducing appa Optical head transfer circuit, optical head and reproducing appa

1997-09-30

2000-03-28

Hindi, Nabil

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4428, 369 4432, G11B 700

Patent

active

060440503

ABSTRACT:
In the optical head transfer circuit of the related art, a sled error signal generated only via a low-pass filter has been used as the tracking error signal. However, the present invention provides a portable type reproducing apparatus which compensates a DC element corresponding to a shifting displacement of an objective lens generated depending on a change of attitude of the reproducing apparatus with a sled feed mechanism, and does not result in deterioration of reproducing characteristics depending on vertical or horizontal installation. The present invention and has realized much improvement in vibration characteristics, because a signal from which the DC element is eliminated corresponding to the shifting displacement of the objective lens is used as the tracking error signal and the sled error signal is generated depending on a signal from which the DC element is not yet eliminated.

REFERENCES:
patent: 4998234 (1991-03-01), Rees et al.
patent: 5181195 (1993-01-01), Kume et al.
patent: 5363358 (1994-11-01), Yanagawa
patent: 5568458 (1996-10-01), Tani et al.
patent: 5708636 (1998-01-01), Takahashi et al.
patent: 5875157 (1999-02-01), Sasaki et al.

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