发明名称 |
OPTICAL DISC DEVICE |
摘要 |
An optical disc device includes: a balance adjustment circuit (6) for adjusting the level of a first and a second detection signal obtained from a tracking detector; a differential circuit (8) for generating a difference signal between the adjusted first and the second detection signal; an AD conversion circuit (10) for converting the difference signal into a digital signal; a wobble signal detection circuit (14) for detecting a wobble signal from the digital-converted difference signal; an addition circuit (30) for generation a sum signal of the adjusted first and second detection signal; a binarization circuit (32) for converting the sum signal into a binary signal; a latch circuit (33) for latching the binary signal and converting it into a timing signal; a control signal generation circuit (34) for generating a control signal according to the timing signal and the digital-converted difference signal; a residual component removal circuit (18) for removing the residual signal component contained in the digital-converted difference signal according to the control signal and outputting an LPP detection signal; and an address detection circuit (21) for detecting address information from the LPP detection signal. Thus, it is possible to surely detect the wobble signal and the LPP signal with a simple configuration. |
申请公布号 |
WO2005015548(A2) |
申请公布日期 |
2005.02.17 |
申请号 |
WO2004JP11584 |
申请日期 |
2004.08.05 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;HASHIMOTO, KIYOKAZU |
发明人 |
HASHIMOTO, KIYOKAZU |
分类号 |
G11B;G11B7/005;G11B20/10;G11B20/14;G11B27/24 |
主分类号 |
G11B |
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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