Auto gain adjustment apparatus and method for focusing and track

Details Auto gain adjustment apparatus and method for focusing and track Auto gain adjustment apparatus and method for focusing and track

1998-04-06

2000-12-05

Psitos, Aristotelis M.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4436, G11B 7095

Patent

active

061576018

ABSTRACT:
An auto gain adjustment apparatus and method are provided for the focusing/tracking control of the optical pickup of an optical disc drive. The gain is obtained by utilizing the self-sustained oscillation from a non-linear component in the optical disc drive, such as a relay circuit with hysteresis. This gain adjustment apparatus and method is more advantageous than the prior art in that the gain can be automatically adjusted without involving manual work and the need to apply an externally generated oscillating test signal. The apparatus and method therefore allows the manufacture and utilization of the optical disc drive to be more efficient and cost-effective.

REFERENCES:
patent: 5559772 (1996-09-01), Takeda
patent: 5600615 (1997-02-01), Kiyoura et al.
patent: 5764605 (1998-06-01), Zucker et al.
patent: 5974009 (1999-10-01), Tamura et al.

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