发明授权
US5327407A Tracking control apparatus for generating sawtooth tracking control
signal from sinusoidal tracking error signal
失效
用于从正弦跟踪误差信号产生锯齿跟踪控制信号的跟踪控制装置
- 专利标题： Tracking control apparatus for generating sawtooth tracking control signal from sinusoidal tracking error signal
- 专利标题（中）： 用于从正弦跟踪误差信号产生锯齿跟踪控制信号的跟踪控制装置
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申请号： US832406申请日： 1992-02-07
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公开(公告)号： US5327407A公开(公告)日： 1994-07-05
- 发明人: Motoyuki Suzuki , Yoshio Suzuki , Yukio Fukui
- 申请人： Motoyuki Suzuki , Yoshio Suzuki , Yukio Fukui
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX3-016336 19910207
- 主分类号： G11B7/085
- IPC分类号： G11B7/085 ; G11B7/09 ; G11B21/10 ; G11B7/095
摘要：
A tracking control apparatus includes an A/D converter, an edge detection circuit, a latch circuit and a ROM to change a tracking error signal having a sinusoidal characteristic representing a relative position of a light beam and a track on a disk to have a sawtooth characteristic representing the relative position. Stable tracking control free from off-tracking due to a disturbance is attained even when amplitudes of the tracking error signal and a tracking sum signal are not equal.
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