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    Apparatus for reading a magneto-optical disk
    7.
    发明授权
    Apparatus for reading a magneto-optical disk 失效
    用于读取磁光盘的装置

    公开(公告)号：US5003525A

    公开(公告)日：1991-03-26

    申请号：US209552

    申请日：1988-06-21

    申请人： Masayoshi Shimamoto ,  Kazuhiko Nakane ,  Teruo Furukawa

    发明人： Masayoshi Shimamoto ,  Kazuhiko Nakane ,  Teruo Furukawa

    IPC分类号： G11B7/09 ,  G11B7/005 ,  G11B7/13 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04 ,  G11B27/24

    CPC分类号： G11B7/005 ,  G11B11/10536 ,  G11B11/10597 ,  G11B13/04 ,  G11B27/24 ,  G11B7/13

    摘要： A recording medium drive apparatus has a first detector for detecting tracking information and a second detector for detecting focusing information when magnetization information and pit information recorded on an optical disc are reproduced and detected. This apparatus also comprises a preamplifier having the function of selecting by a control signal either a mode for adding and amplifying output signals of the first and second detectors by utilizing a predetermined gain or a mode for subtracting and amplifying those output signals by utilizing another predetermined gain, of unconditionally selecting the polarities of the added and subtracted amplification signals by means of the control signal, and of selectively outputting signals V.sub.i (i=1, 2, 3, 4).

    摘要翻译： 记录介质驱动装置具有用于检测跟踪信息的第一检测器和用于在再现和检测记录在光盘上的磁化信息和凹坑信息时检测聚焦信息的第二检测器。 该装置还包括具有通过控制信号选择用于通过利用预定增益来添加和放大第一和第二检测器的输出信号的模式的功能的前置放大器，或者通过利用另外的预定增益来减法和放大那些输出信号的模式 ，通过控制信号无条件地选择加法和减法的放大信号的极性，并选择性地输出信号Vi（i = 1,2,3,4）。

    Optical disk and optical disk drive device
    8.
    发明申请
    Optical disk and optical disk drive device 失效
    光盘和光盘驱动器

    公开(公告)号：US20080008055A1

    公开(公告)日：2008-01-10

    申请号：US11822404

    申请日：2007-07-05

    申请人： Kyosuke Yoshimoto ,  Mahesh Rao ,  Hiroyuki Ohata ,  Kazuhiko Nakane ,  Teruo Furukawa ,  Junichi Kondo ,  Masafumi Ototake

    发明人： Kyosuke Yoshimoto ,  Mahesh Rao ,  Hiroyuki Ohata ,  Kazuhiko Nakane ,  Teruo Furukawa ,  Junichi Kondo ,  Masafumi Ototake

    IPC分类号： G11B21/08

    CPC分类号： G11B7/0079 ,  G11B7/00745

    摘要： An optical disk physical has a recording region divided into zones, each zone including physical tracks adjacent to each other. An integer number of sectors are provided in each physical track. The angular recording density is higher in the more outward zones such that the linear recording density is substantially constant throughout the recording region, and logical tracks are formed of a predetermined number of sectors. independent of the physical tracks. The conversion between the logical track and sector addresses read from the disk and the linear logical addresses supplied from a host device is easy. The addresses written in headers of the sectors in the logical track in which data are actually recorded, including substitute sectors used in place of defect sectors, are preferably consecutive to further facilitate the conversion between the logical track and sector addresses read from the disk and the linear logical addresses supplied from the host device. Each of the zones can be set to serve as any of the different types of recording area, independently of other zones.

    摘要翻译： 光盘物理上具有划分成区域的记录区域，每个区域包括彼此相邻的物理轨道。 在每个物理轨道中提供整数个扇区。 在更向外的区域中角度记录密度较高，使得整个记录区域的线性记录密度基本恒定，并且逻辑磁道由预定数量的扇区形成。 独立于物理轨道。 从磁盘读取的逻辑磁道和扇区地址与从主机设备提供的线性逻辑地址之间的转换很容易。 写入数据实际记录的逻辑磁道中的扇区头部的地址，包括用于代替缺陷扇区的替代扇区，优选地是连续的，以进一步促进从盘读取的逻辑磁道和扇区地址之间的转换 从主机设备提供的线性逻辑地址。 每个区域可以设置为独立于其他区域，用作任何不同类型的记录区域。