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    • 2. 发明授权
    • Positioning device for optical disc apparatus
    • 光盘设备定位装置
    • US5633846A
    • 1997-05-27
    • US595218
    • 1996-02-01
    • Atsushi OkuyamaTakashi YoshidaFujio TajimaMasamichi ItoYasuhiro MiiMasato SomaHidehito Yamada
    • Atsushi OkuyamaTakashi YoshidaFujio TajimaMasamichi ItoYasuhiro MiiMasato SomaHidehito Yamada
    • G11B7/09
    • G11B7/0945G11B7/0941
    • A positioning system of an optical disc apparatus includes focus error detecting part for detecting a focus error signal as a focal shift of a light spot related to an information recording surface of an optical disc, light spot moving part in the direction intersecting substantially perpendicularly to the optical disc surface, first digital arithmetic part for receiving the focus error signal and outputting a first control signal, second digital arithmetic part for receiving the focus error signal and a specified third control signal, performing arithmetic operations of a disturbance observer and outputting a second control signal, adding circuit for adding the first control signal and the second control signal and outputting the third control signal, drive circuit for driving the light spot moving part in a direction intersecting perpendicularly to the disc surface by the third control signal, wherein the first and the second digital arithmetic circuit perform arithmetic operations at different sampling periods.
    • 光盘装置的定位系统包括:聚焦误差检测部分,用于检测聚焦误差信号,作为与光盘的信息记录表面相关的光点的焦点偏移;光点移动部分,在与 光盘表面,用于接收聚焦误差信号并输出​​第一控制信号的第一数字运算部分,用于接收聚焦误差信号的第二数字运算部分和指定的第三控制信号,执行干扰观察者的算术运算,并输出第二控制 信号添加电路,用于添加第一控制信号和第二控制信号,并输出第三控制信号;驱动电路,用于通过第三控制信号沿垂直于盘表面的方向驱动光点运动部分,其中第一和 第二数字运算电路执行算术运算a t不同的采样周期。