发明授权
- 专利标题: Automatic detecting device for land pre-pits signals
- 专利标题(中): 土地预坑信号自动检测装置
-
申请号: US10743429申请日: 2003-12-23
-
公开(公告)号: US07266076B2公开(公告)日: 2007-09-04
- 发明人: Feng-Hsiang Lo , Yong-Long Lee , Kuo-Ding Shin , Chin-Shou Huang , Shin-Huei Wu , Chih-Chung Wu , Shin-Bo Wang
- 申请人: Feng-Hsiang Lo , Yong-Long Lee , Kuo-Ding Shin , Chin-Shou Huang , Shin-Huei Wu , Chih-Chung Wu , Shin-Bo Wang
- 申请人地址: TW Hsinchu
- 专利权人: Industrial Technology Research Institute
- 当前专利权人: Industrial Technology Research Institute
- 当前专利权人地址: TW Hsinchu
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: TW92118247A 20030703
- 主分类号: G11B7/00
- IPC分类号: G11B7/00
摘要:
An automatic detecting device of land pre-pits signal is disclosed. The device adjusts gain of push-pull signals to raise the signal to noise ratio of the land pre-pits signal to the wobble signal. Digital logic computation is also utilized to recognize the practical position of the land pre-pits. The level automatic detection of the RC circuit and the fixed slice level compose an automatic slice level, which is the basis for detecting the land pre-pits. The disclosed device eliminates the drawback of not easy to obtain correct land pre-pits signal from written disks by the conventional of fixed land pre-pits slice level technology.
公开/授权文献
- US20050002304A1 Automatic detecting device for land pre-pits signals 公开/授权日:2005-01-06