Magnetooptical disk focus and tracking servo for a magnetooptical disk
servo device
    1.
    发明授权
    Magnetooptical disk focus and tracking servo for a magnetooptical disk servo device 失效
    用于磁光盘伺服装置的磁光盘聚焦跟踪伺服

    公开(公告)号:US5894462A

    公开(公告)日:1999-04-13

    申请号:US791140

    申请日:1997-01-30

    申请人: Min Hwangbo

    发明人: Min Hwangbo

    摘要: A magnetooptical disk focus servo and tracking servo which remain stable and which make various servo control gains uniform even when the amount of light detected in a photodetecting portion changes. An operator outputs a sum signal by adding signals corresponding to an amount of light detected in at least two photodiodes among a plurality of photodiodes of the photodetecting portion. A first divider divides a focus error signal by the sum signal. A second divider divides a tracking error signal by the sum signal. A focus servo portion controls a focus actuator using the output of the first divider, and a tracking servo portion for controlling a track actuator with the output of the second divider.

    摘要翻译: 磁光盘聚焦伺服和跟踪伺服保持稳定,并且即使在光检测部分中检测到的光量变化时,也使各种伺服控制增益均匀。 操作者通过将与在光检测部的多个光电二极管中的至少两个光电二极管中检测到的光量相对应的信号相加来输出和信号。 第一分频器将聚焦误差信号除以和信号。 第二分频器将跟踪误差信号除以和信号。 聚焦伺服部分使用第一分割器的输出来控制聚焦致动器,以及跟踪伺服部分,用于利用第二分割器的输出来控制轨道致动器。

    Servo controlling apparatus of optical disk drive and control method
thereof
    2.
    发明授权
    Servo controlling apparatus of optical disk drive and control method thereof 失效
    光盘驱动器的伺服控制装置及其控制方法

    公开(公告)号:US5856960A

    公开(公告)日:1999-01-05

    申请号:US856816

    申请日:1997-05-15

    摘要: A servo controlling apparatus of an optical disk drive and a control method thereof are provided for achieving precise control by automatically controlling the gain of error signals caused by the difference in the amount of light irradiated during recording and reproducing, and then using the automatically gain-controlled signal. In a first control step, a focus error signal and a tracking error signal generated from a photodetecting portion via an operator are multiplied by a predetermined value in different multipliers, and then each obtained value is divided by an RF sum signal to control the value of error to within a predetermined target value. In a second control step, each multiplied focus error signal and tracking error signal are divided by a DC signal corresponding to the average level of the RF sum signal when the error value reaches the target value.

    摘要翻译: 提供了一种光盘驱动器的伺服控制装置及其控制方法,用于通过自动控制在记录和再现期间照射的光量的差引起的误差信号的增益,从而实现精确的控制,然后使用自动增益 - 受控信号。 在第一控制步骤中,通过操作者从光电检测部分产生的聚焦误差信号和跟踪误差信号在不同乘法器中乘以预定值,然后将每个获得的值除以RF和信号,以控制 误差在预定目标值内。 在第二控制步骤中,当误差值达到目标值时,每个相乘的聚焦误差信号和跟踪误差信号被除以对应于RF和信号的平均电平的DC信号。