Optical disc accessing apparatus capable of preventing error in

Details Optical disc accessing apparatus capable of preventing error in Optical disc accessing apparatus capable of preventing error in

1998-11-10

2000-06-27

Dinh, Tan

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

36912415, G11B 1722

Patent

active

060814853

ABSTRACT:
An optical disc apparatus prevents an occurrence of an error in the mirror signal due to a change in a reproducing speed or usage of different kinds of optical discs. A mirror circuit generates a mirror signal by comparing a level of a bottom signal with a level of a reference level signal. The bottom signal is detected from a reflection signal obtained by optically scanning the optical disc. A reference level control circuit generates a reference level control signal based on the reproducing speed. A reference level signal setting circuit sets a level of the reference level signal in accordance with the reference level control signal.

REFERENCES:
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patent: 5563856 (1996-10-01), Kim
patent: 5841739 (1998-11-01), Iida et al.
patent: 5841751 (1998-11-01), Komazaki et al.
patent: 5953305 (1999-09-01), Jeong
patent: 5963516 (1999-10-01), Hashimoto et al.
patent: 5974010 (1999-10-01), Sakanushi

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