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20 条记录 (耗时 0.017 秒)

    Optical disc recording and/or reproducing apparatus having a buffer memory to accommodate track jumps
    4.
    发明授权
    Optical disc recording and/or reproducing apparatus having a buffer memory to accommodate track jumps 失效
    具有缓冲存储器以容纳轨道跳跃的光盘记录和/或再现设备

    公开(公告)号：US5317553A

    公开(公告)日：1994-05-31

    申请号：US745486

    申请日：1991-08-15

    申请人： Norio Ohga ,  Katsuaki Tsurushima ,  Tadao Yoshida

    发明人： Norio Ohga ,  Katsuaki Tsurushima ,  Tadao Yoshida

    IPC分类号： G11B20/12 ,  G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B11/105 ,  G11B20/00 ,  G11B20/10 ,  G11B21/08 ,  G11B27/00 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/36

    CPC分类号： G11B20/10527 ,  G11B11/10502 ,  G11B11/10595 ,  G11B20/00007 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3063 ,  G11B27/36 ,  G11B7/004 ,  G11B7/0946 ,  G11B2020/10592 ,  G11B2220/20 ,  G11B2220/216 ,  G11B2220/2525 ,  G11B2220/2545 ,  G11B27/3027

    摘要： A disc-shaped recording medium and a recording/reproducing apparatus employing the disc-shaped recording medium as a recording medium, are disclosed. The recording medium has a diameter of not more than 80 mm, and a recording track is formed on the recording medium with a track pitch of approximately 1.6 .mu.m. Information in excess of 130 Mbytes is recorded in a data compressed state on the recording track and the recording medium is rotationally driven at a constant linear velocity for recording and optically reproducing the information. The recording/reproducing apparatus employing the disc-shaped recording medium as a recording medium includes a buffer memory between a data compressing circuit for compressing input digital data and a recording encoding circuit for processing the compressed data by modulation suitable for recording, as long as a recording system of the apparatus is concerned, and a buffer memory between a playback decoding circuit for processing the compressed data by error correction decoding and demodulation complementary to the modulation and a data expansion circuit for expanding the compressed data to the original state. By suitably selecting the capacity of the buffer memories, recording and reproduction may continue satisfactorily even if the scanning position of the recording head and the optical head undergoes track jump during recording or reproduction.

    摘要翻译： 公开了一种盘形记录介质和采用盘形记录介质作为记录介质的记录/再现装置。 记录介质的直径不大于80mm，并且记录轨道形成在轨道间距大约为1.6μm的记录介质上。 在记录磁道上以数据压缩状态记录超过130M字节的信息，并且以恒定的线速旋转驱动记录介质以进行记录和光学再现信息。 采用盘形记录介质作为记录介质的记录/再现装置包括用于压缩输入数字数据的数据压缩电路和用于通过适于记录的调制来处理压缩数据的记录编码电路之间的缓冲存储器，只要 关于该装置的记录系统以及用于通过纠错解码和与调制互补的解调来处理压缩数据的重放解码电路之间的缓冲存储器和用于将压缩数据扩展到原始状态的数据扩展电路。 通过适当地选择缓冲存储器的容量，即使记录头和光头的扫描位置在记录或再现期间经历轨迹跳跃，记录和再现可以令人满意地继续。

    Optical disk and disk chucking mechanism
    6.
    发明授权
    Optical disk and disk chucking mechanism 失效
    光盘和磁盘夹紧机构

    公开(公告)号：US5666347A

    公开(公告)日：1997-09-09

    申请号：US343362

    申请日：1994-11-22

    申请人： Tadao Yoshida ,  Katsuaki Tsurushima

    发明人： Tadao Yoshida ,  Katsuaki Tsurushima

    IPC分类号： G11B17/028 ,  G11B23/00 ,  G11B3/70

    CPC分类号： G11B17/0282 ,  G11B23/0035

    摘要： A plate made of a magnetic material is secured to an optical disk so that it closes a central hole formed in a disk substrate. An optical disk chucking mechanism for chucking the optical disk to a disk table attracts the magnetic plate by the magnet to cause a platen to abut to the disk substrate and a tapered portion to abut to the inner side of the central hole so that the optical disk is restricted in position and is held. The optical disk and optical disk chucking mechanism restrict the loading position of the optical disk on the disk table independently of the mounting position of the magnetic plate on the disk substrate.

    摘要翻译： 由磁性材料制成的板被固定在光盘上，从而封闭形成在盘基片上的中心孔。 用于将光盘夹持到盘台的光盘夹紧机构通过磁体吸引磁板，使压板与盘基板抵接，锥形部分抵靠中心孔的内侧，使得光盘 被限制在被拘留。 光盘和光盘夹持机构将磁盘的装载位置限制在盘片基板上的磁盘的安装位置上。

    Objective lens mount and drive for optical disc player
    7.
    发明授权
    Objective lens mount and drive for optical disc player 失效
    物镜安装和驱动光盘播放器

    公开(公告)号：US4482988A

    公开(公告)日：1984-11-13

    申请号：US579800

    申请日：1984-02-17

    申请人： Katsuaki Tsurushima ,  Kenji Shintani

    发明人： Katsuaki Tsurushima ,  Kenji Shintani

    IPC分类号： G11B7/08 ,  G11B7/09 ,  G11B7/12

    CPC分类号： G11B7/093 ,  G11B7/08

    摘要： In an optical disc player or other apparatus in which a light beam is directed through an objective lens to be focused thereby at a record medium surface for optically reading information recorded in a track on such surface; the objective lens has its central axis offset in respect to the longitudinal axis of a cylindrical body forming part of a movable assembly and through which the light beam passes axially, and such cylindrical body is both angularly displaceable about its longitudinal axis and axially displaceable relative to a guide bearing forming part of a fixed assembly to correct for tracking errors and for focusing errors, respectively. The fixed assembly further includes a magnetic circuit generating a magnetic field which intersects coils included in the movable assembly to receive focusing error and tracking error signals, respectively.

    摘要翻译： 在光盘播放器或其他装置中，其中光束被引导通过物镜以被聚焦在记录介质表面上，用于光学地读取记录在该表面上的轨道中的信息; 物镜相对于形成可移动组件的一部分的圆柱形主体的纵向轴线具有其中心轴偏移，并且光束通过该中心轴线轴向偏移，并且该圆柱形主体可以围绕其纵向轴线成角度地移位并且可相对于 形成固定组件的一部分的导向轴承，以分别校正跟踪误差和聚焦误差。 固定组件还包括产生与包括在可移动组件中的线圈相交的磁场的磁路，以分别接收聚焦误差和跟踪误差信号。

    Muting circuit
    8.
    发明授权
    Muting circuit 失效
    静音电路

    公开(公告)号：US3992677A

    公开(公告)日：1976-11-16

    申请号：US570635

    申请日：1975-04-23

    申请人： Katsuaki Tsurushima

    发明人： Katsuaki Tsurushima

    IPC分类号： H03F1/00 ,  H01L21/331 ,  H01L29/73 ,  H03G3/34 ,  H03F1/26

    CPC分类号： H03G3/348

    摘要： A muting circuit which includes an amplifier having input and output terminals and a bi-directional transistor connectd between the output terminal and a circuit point of low reference potential. The transistor has emitter base and collector regions, the emitter region having a low impurity concentration substantially the same as that of the collector region and a potential barrier being provided opposite to the junction of the emitter and base regions at a distance which is smaller than the diffusion length of minority carriers of the base region. A control signal generating means including time constant means for turning on the bi-directional transistor is provided. The time constant means assures that the bi-directional transistor will be on for only a brief interval of time to bypass the output signal of the amplifier to the low reference potential circuit point and thereby avoid the presence of a pop noise at the speaker.

    摘要翻译： 一种静噪电路，包括具有输入和输出端的放大器和连接在输出端和低参考电位的电路点之间的双向晶体管。 晶体管具有发射极基极和集电极区域，发射极区域具有与集电极区域基本相同的低杂质浓度，并且势垒位于与发射极和基极区域的接合点相对的距离处，该距离小于 基区少数载体的扩散长度。 提供了包括用于接通双向晶体管的时间常数装置的控制信号发生装置。 时间常数意味着确保双向晶体管将仅短暂的时间间隔，以将放大器的输出信号旁路到低参考电位电路点，从而避免在扬声器处存在流行噪声。