发明授权
- 专利标题： Optical drive device and amplification rate determining method
- 专利标题（中）： 光驱装置及放大率确定方法
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申请号： US12546174申请日： 2009-08-24
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公开(公告)号： US08189436B2公开(公告)日： 2012-05-29
- 发明人: Tetsuya Nishiyama
- 申请人： Tetsuya Nishiyama
- 申请人地址： JP Tokyo
- 专利权人： TDK
- 当前专利权人： TDK
- 当前专利权人地址： JP Tokyo
- 代理机构： Young Law Firm, PC
- 优先权： JP2008-216026 20080825; JP2008-216027 20080825; JP2008-328503 20081224; JP2008-328504 20081224; JP2009-145834 20090618
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
An optical drive device generates a first push-pull signal and a first sum signal based on a light receiving amount in two light receiving areas of which each width in a signal light tangent direction is smaller than a diameter of a spot of signal light, generates a first normalized push-pull signal by normalizing the first push-pull signal by using the first sum signal, and generates a tracking error signal based on the first normalized push-pull signal.
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