Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Reexamination Certificate
2005-06-28
2005-06-28
Klimowicz, William (Department: 2652)
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
C369S124120
Reexamination Certificate
active
06912190
ABSTRACT:
An optical disc apparatus reads the address information from an optical disc which has tracks and track spaces formed between tracks. The apparatus has an optical head which irradiates the disc with light and includes tracking detectors, divided into a first detector and a second detector in a track direction, detecting the light reflected from the disc and outputting detection signals, an adjusting circuit which adjusts amplitudes of the first and second detection signals and outputs the signals at a position where the address information is recorded, a differential amplifying circuit which outputs the differential signal which is the difference between the adjusted first and second detection signals, and an address detecting circuit which detects the address information based on the differential signal. As a result, the optical disc apparatus accurately detects whether information is being recorded on a correct track and improves the reliability during recording.
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Inokuchi Chikashi
Kawai Takashi
Koishi Kenji
Konno Kohjyu
Oohta Mitsuhiko
Agustin Peter Vincent
Klimowicz William
Matsushita Electric - Industrial Co., Ltd.
Victor Company of Japan , Limited
Wenderoth , Lind & Ponack, L.L.P.
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