发明名称 |
Optical disk apparatus with a groove/pit area discrimination circuit |
摘要 |
An optical disk apparatus for recording and reproducing data to and from an optical disk has a pit area where data are recorded along a track by pits and a groove area where grooves are formed along a track to record data. The optical disk apparatus includes an optical head for projecting a light beam on the optical disk and a photodetector array for receiving the reflected light. A preamplifier is connected to the photodetector array for producing a tracking error signal and an RF signal representing the pits. The tracking error signal is used as a clock signal in flip-flops and the RF signal is used as an initial setting signal, so that the flip-flop produces a signal indicating that the optical head is in the pit area.
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申请公布号 |
US5805542(A) |
申请公布日期 |
1998.09.08 |
申请号 |
US19960677361 |
申请日期 |
1996.07.05 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
SOMA, YASUHITO;SHIBANO, MASAYUKI |
分类号 |
G11B7/00;G11B7/005;G11B7/085;G11B7/09;(IPC1-7):G11B7/09 |
主分类号 |
G11B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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