发明授权
US4005260A Device for reading a disk-shaped record carrier with time base correction
失效
用于读取具有时基校正的盘形记录载体的装置
- 专利标题: Device for reading a disk-shaped record carrier with time base correction
- 专利标题(中): 用于读取具有时基校正的盘形记录载体的装置
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申请号: US587636申请日: 1975-06-17
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公开(公告)号: US4005260A公开(公告)日: 1977-01-25
- 发明人: Peter Johannes Michiel Janssen
- 申请人: Peter Johannes Michiel Janssen
- 申请人地址: NY New York
- 专利权人: U.S. Philips Corporation
- 当前专利权人: U.S. Philips Corporation
- 当前专利权人地址: NY New York
- 优先权: NL7215306 19721111
- 主分类号: G05D3/14
- IPC分类号: G05D3/14 ; G11B7/08 ; G11B7/095 ; H04N5/76
摘要:
Device for reading-out a disk-shaped record carrier. To compensate for time-base errors of the detected signal caused by eccentricity or out-of-roundness of the record carrier, a tangential tracking system is provided with which the tangential position of the scanning point on the record carrier can be controlled. A control signal for this tangential tracking system is obtained by extracting the line synchronizing signal from the detected video signal. By ensuring through the use of a filter element that the overall transfer function of the control system exhibits a band-pass characteristic about the frequency which corresponds to the speed of the record carrier, a suitable tangential tracking is ensured.
公开/授权文献
- US5820334A Paper set feeding 公开/授权日:1998-10-13