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33 条记录 (耗时 0.018 秒)

    Driving signal for coarse servo employing sampled offset signal
    32.
    发明授权
    Driving signal for coarse servo employing sampled offset signal 失效
    采用采样偏移信号的粗伺服驱动信号

    公开(公告)号：US4864552A

    公开(公告)日：1989-09-05

    申请号：US902350

    申请日：1986-08-29

    申请人： Kurt W. Getreuer ,  David L. Schell

    发明人： Kurt W. Getreuer ,  David L. Schell

    IPC分类号： G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/08505 ,  G11B7/0938 ,  G11B7/094

    摘要： An apparatus and method are provided for generating a coarse actuator drive signal. A fine actuator, operatively attached to a coarse actuator, defines an optical pathway through which light reflected from various structures residing on a disk passes. A split detector, attached to the coarse assembly and positioned to intercept light from the optical pathway, receives the light reflected by the structures residing on the disk and generates signals representative of the light incident on each half of the split detector. A difference between the signals produced by the split detector indicates that the coarse actuator is not centered or aligned with respect to the fine actuator. Processing circuitry processes the signals produced by the split detector according to the disk structure utilized to produce the signals and generates a coarse actuator drive signal. The drive signal is applied to the coarse actuator thereby causing the coarse assembly to move and ultimately centering or aligning the fine assembly relative to the coarse assembly.

    摘要翻译： 提供了一种用于产生粗致动器驱动信号的装置和方法。 可操作地连接到粗致动器的精细致动器限定了光路径，通过该光路径从驻留在盘上的各种结构反射的光通过。 分离检测器，附接到粗糙组件并定位成拦截来自光学路径的光，接收由驻留在盘上的结构反射的光，并产生表示入射在分离检测器的每一半上的光的信号。 由分割检测器产生的信号之间的差异表明，粗略致动器不是相对于精细致动器居中或对齐。 处理电路根据用于产生信号的盘结构处理由分离检测器产生的信号，并产生粗致动器驱动信号。 驱动信号被施加到粗致动器，从而使得粗组件移动并最终使精细组件相对于粗组件定心或对准。

    Sampled servo for an optical disk drive
    33.
    发明授权
    Sampled servo for an optical disk drive 失效
    光盘驱动器的采样伺服

    公开(公告)号：US4779253A

    公开(公告)日：1988-10-18

    申请号：US902278

    申请日：1986-08-29

    申请人： Kurt W. Getreuer ,  Johannes J. Verboom ,  David L. Schell ,  David E. Lewis

    发明人： Kurt W. Getreuer ,  Johannes J. Verboom ,  David L. Schell ,  David E. Lewis

    IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/0065 ,  G11B7/007 ,  G11B7/013 ,  G11B7/085 ,  G11B7/09 ,  G11B7/24 ,  G11B21/10

    CPC分类号： G11B7/085 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/24085

    摘要： Sampled servo data comprising one pit centered on a track and two pits spaced 1/4 track pitch from track center on opposite sides thereof provide for two sinusoidal tracking signals, one radially phase offset from the other by 90 degrees. A first tracking signal derived from subtracting the signals of the offset pits has a zero crossing at track center and is used by the servo system for tracking. Its derivative is used for damping. A second tracking signal derived from all three pits has maxima at track centers and is therefore 90 degrees out of phase with the first tracking signal. This second signal provides track crossing information, and when used in quadrature with the first tracking signal, provides information about the radial direction of crossing. The second signal also provides a control signal for inverting the damping signal while between tracks when the derivative of the first tracking signal would ordinarily be negative and provide for negative damping.

    摘要翻译： 包括以轨道为中心的一个凹坑的采样伺服数据和在其相对侧上从轨道中心间隔开1/4轨道间距的两个凹坑提供两个正弦跟踪信号，一个径向相位偏移90度。 从减去偏移坑的信号得到的第一跟踪信号在轨道中心处具有过零点，并被伺服系统用于跟踪。 其导数用于阻尼。 从所有三个凹坑导出的第二跟踪信号在轨道中心处具有最大值，因此与第一跟踪信号相差90度。 该第二信号提供轨道交叉信息，并且当与第一跟踪信号正交使用时，提供关于横向的径向方向的信息。 当第一跟踪信号的导数通常为负并且提供负阻尼时，第二信号还提供用于在磁道之间反转阻尼信号的控制信号。