利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

25 条记录 (耗时 0.039 秒)

    Disc device having eccentricity measurement and clock correction
    3.
    发明授权
    Disc device having eccentricity measurement and clock correction 失效
    具有偏心测量和时钟校正的光盘设备

    公开(公告)号：US5905705A

    公开(公告)日：1999-05-18

    申请号：US821329

    申请日：1997-03-21

    申请人： Toru Takeda ,  Satoru Seko ,  Hideaki Ishioka ,  Itaru Tomisaki

    发明人： Toru Takeda ,  Satoru Seko ,  Hideaki Ishioka ,  Itaru Tomisaki

    IPC分类号： G11B5/48 ,  G11B7/095 ,  G11B21/10 ,  G11B27/30

    CPC分类号： G11B5/4826 ,  G11B21/106 ,  G11B7/0953

    摘要： A magnetic or optical disc device which can correctly follow the eccentricity of an eccentrically chucked disk and which can immediately follow the eccentricity of the new disk face when there is a changeover of the disc being accessed operates with a disc having data tracks provided with uniformly spaced clock marks for providing a timing standard and includes a reproduction circuit for reproducing data from the disc, a clock sampling circuit for extracting a first clock signal output by the reproduction circuit, an eccentricity magnitude memory section for storing a signal corresponding to the eccentricity of the data tracks with respect to the axis of rotation of the disc; a clock correction section. The device further includes a voltage control oscillator operating according to the signal corresponding to the eccentricity for causing a second clock signal output by the voltage control oscillator to follow the first clock signal by changing the phase or the frequency of the second clock signal and an eccentricity magnitude measuring section for measuring the signal corresponding to the eccentricity from the first clock signal and the output signal of the reproduction circuit and supplying it to the eccentricity magnitude memory section.

    摘要翻译： 一种磁盘或光盘装置，其可以正确地跟随偏心卡盘的偏心，并且当存在正在被访问的盘的切换时，可以立即跟随新的盘面的偏心，操作具有数据轨道的盘，该盘具有均匀间隔的数据轨道 用于提供定时标准的时钟标记，并且包括用于再现来自盘的数据的再现电路，用于提取由再现电路输出的第一时钟信号的时钟采样电路;偏心量值存储部分，用于存储对应于 相对于盘的旋转轴的数据轨道; 时钟校正部。 该装置还包括电压控制振荡器，该电压控制振荡器根据对应于偏心率的信号进行工作，以使由压控振荡器输出的第二时钟信号通过改变第二时钟信号的相位或频率来跟随第一时钟信号， 幅度测量部分，用于测量来自第一时钟信号的对应于偏心率的信号和再现电路的输出信号，并将其提供给偏心量值存储部分。

    Disc device having eccentricity measurement and clock correction
    4.
    发明授权
    Disc device having eccentricity measurement and clock correction 失效

    公开(公告)号：US5745455A

    公开(公告)日：1998-04-28

    申请号：US821330

    申请日：1997-03-21

    申请人： Toru Takeda ,  Satoru Seko ,  Hideaki Ishioka ,  Itaru Tomisaki

    发明人： Toru Takeda ,  Satoru Seko ,  Hideaki Ishioka ,  Itaru Tomisaki

    IPC分类号： G11B5/48 ,  G11B7/095 ,  G11B21/10 ,  G11B27/30

    CPC分类号： G11B5/4826 ,  G11B21/106 ,  G11B7/0953

    摘要： A magnetic or optical disc device which can correctly follow the eccentricity of an eccentrically chucked disk and which can immediately follow the eccentricity of the new disk face when there is a changeover of the disc being accessed operates with a disc having data tracks provided with uniformly spaced clock marks for providing a timing standard and includes a reproduction circuit for reproducing data from the disc, a clock sampling circuit for extracting a first clock signal output by the reproduction circuit, an eccentricity magnitude memory section for storing a signal corresponding to the eccentricity of the data tracks with respect to the axis of rotation of the disc; a clock correction section. The device further includes a voltage control oscillator operating according to the signal corresponding to the eccentricity for causing a second clock signal output by the voltage control oscillator to follow the first clock signal by changing the phase or the frequency of the second clock signal and an eccentricity magnitude measuring section for measuring the signal corresponding to the eccentricity from the first clock signal and the output signal of the reproduction circuit and supplying it to the eccentricity magnitude memory section.

    Disc device having eccentricity measurement and clock correction
    5.
    发明授权
    Disc device having eccentricity measurement and clock correction 失效
    具有偏心测量和时钟校正的光盘设备

    公开(公告)号：US5615191A

    公开(公告)日：1997-03-25

    申请号：US555542

    申请日：1995-11-09

    申请人： Toru Takeda ,  Satoru Seko ,  Hideaki Ishioka ,  Itaru Tomisaki

    发明人： Toru Takeda ,  Satoru Seko ,  Hideaki Ishioka ,  Itaru Tomisaki

    IPC分类号： G11B5/48 ,  G11B7/095 ,  G11B21/10 ,  G11B27/30

    CPC分类号： G11B5/4826 ,  G11B21/106 ,  G11B7/0953

    摘要： A magnetic or optical disc device which can correctly follow the eccentricity of an eccentrically chucked disk and Which can immediately follow the eccentricity of the new disk face when there is a changeover of the disc being accessed operates with a disc having data tracks provided with uniformly spaced clock marks for providing a timing standard and includes a reproduction circuit for reproducing data from the disc, a clock sampling circuit for extracting a first clock signal output by the reproduciton circuit, an eccentricity magnitude memory section for storing a signal corresponding to the eccentricity of the data tracks with respect to the axis of rotation of the disc; a clock correction section. The device further includes a voltage control oscillator operating according to the signal corresponding to the eccentricity for causing a second clock signal output by the voltage control oscillator to follow the first clock signal by changing the phase of the second clock signal or the frequency of the second clock signal and an eccentricity magnitude measuring section for measuring the signal corresponding to the eccentricity from the first clock signal and the output signal of the reproduciton circuit and supplying it to the eccentricity magnitude memory section. The eccentricity magnitude measuring section measures the signal corresponding to the eccentricity by calculating the number of tracks which the reproduction head crosses or by using the non-uniformity of spacing observed in a string of clock pulses reproduced from the uniformly spaced clock marks on the disc.

    摘要翻译： 一种磁盘或光盘装置，其可以正确地跟随偏心卡盘的偏心，并且当存在被访问的盘的切换时，其可以立即跟随新的盘面的偏心，利用具有均匀间隔的数据轨道的盘来操作 用于提供定时标准的时钟标记，并且包括用于再现来自盘的数据的再现电路，用于提取再现电路输出的第一时钟信号的时钟采样电路，用于存储对应于 相对于盘的旋转轴的数据轨道; 时钟校正部。 该装置还包括电压控制振荡器，该电压控制振荡器根据对应于偏心率的信号进行工作，以使由压控振荡器输出的第二时钟信号通过改变第二时钟信号的相位或第二时钟信号的频率来跟随第一时钟信号 时钟信号和偏心量值测量部分，用于测量与第一时钟信号和再现电路的输出信号相对应的偏心度的信号并将其提供给偏心量值存储器部分。 偏心量值测量部通过计算再现头交叉的轨道的数量或通过使用从盘上均匀间隔的时钟标记再现的一串时钟脉冲中观察到的间隔的不均匀性来测量与偏心度相对应的信号。

    Method and apparatus for measuring head deviation and method and apparatus for recording/reproducing data
    6.
    发明授权
    Method and apparatus for measuring head deviation and method and apparatus for recording/reproducing data 失效
    用于测量头偏差的方法和装置，用于记录/再现数据的方法和装置

    公开(公告)号：US6025969A

    公开(公告)日：2000-02-15

    申请号：US165860

    申请日：1998-10-02

    申请人： Hideaki Ishioka ,  Yoshikazu Onuki ,  Satoru Seko ,  Toru Takeda

    发明人： Hideaki Ishioka ,  Yoshikazu Onuki ,  Satoru Seko ,  Toru Takeda

    IPC分类号： G11B5/39 ,  G11B5/455 ,  G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B11/105 ,  G11B21/08 ,  G11B21/10 ,  G11B33/10 ,  G11B5/58

    CPC分类号： G11B5/59627 ,  G11B21/083 ,  G11B21/106 ,  G11B5/5534 ,  G11B11/10573 ,  G11B11/10576 ,  G11B33/10 ,  G11B5/4886

    摘要： A data for measuring deviation between a recording head and a playback head easily for correctly reproducing data despite such deviation. A playback signal amplitude detection circuit 23 detects the amplitude of playback signals of test data from a playback amplifier 15, while adders 51, 52 cumulatively sum the amplitude values of playback signals in a pre-set group of sectors and those in another pre-set sector of groups on a magnetic disc 21 supplied from the playback signal amplitude detection circuit 23. A subtractor 50 computes a difference between a first sum value from the adder 51 and a second sum value from the adder 52 and routes the difference to a controller 11. The controller detects deviation between the recording head and the playback head from the difference value. When recording or reproducing actual data, the controller 11 causes the position of the recording head or the playback head to be corrected on the basis of the detected deviation.

    摘要翻译： 用于测量记录头和回放头之间的偏差的数据，即使有这种偏差，也可以容易地正确地再现数据。 重放信号振幅检测电路23检测来自重放放大器15的测试数据的重放信号的振幅，而加法器51,52将预先设定的扇区组中的重放信号的振幅值累加到另一个预设 从重放信号幅度检测电路23提供的磁盘21上的组的扇区。减法器50计算来自加法器51的第一和值与来自加法器52的第二和值之间的差，并将差值路由到控制器11 控制器根据差值检测记录头与回放头之间的偏差。 当记录或再现实际数据时，控制器11基于检测到的偏差使得记录头或重放头的位置被校正。

    Disc device providing eccentricity compensation using a head radial position detecting circuit
    7.
    发明授权
    Disc device providing eccentricity compensation using a head radial position detecting circuit 失效
    光盘装置使用头部径向位置检测电路提供偏心补偿

    公开(公告)号：US5761165A

    公开(公告)日：1998-06-02

    申请号：US821328

    申请日：1997-03-21

    申请人： Toru Takeda ,  Satoru Seko ,  Hideaki Ishioka ,  Itaru Tomisaki

    发明人： Toru Takeda ,  Satoru Seko ,  Hideaki Ishioka ,  Itaru Tomisaki

    IPC分类号： G11B5/48 ,  G11B7/095 ,  G11B21/10 ,  G11B7/00

    CPC分类号： G11B5/4826 ,  G11B21/106 ,  G11B7/0953

    摘要： A magnetic or optical disc device that can correctly follow the eccentricity of an eccentrically chucked disc operates with a disc having data tracks provided with uniformly spaced clock marks for providing a timing standard and includes a reproduction head mounted on a turnable arm arranged for movement relative to the disc and a head traveling radial position detector attached to the arm that detects the rotational angle and produces a head position signal. A home index signal is detected and used along with the radial position signal and a derived clock signal to measure eccentricity magnitude that is stored in a memory and subsequently accessed for use in generating a control signal for a phase lock loop that provides an eccentricity adjusted clock signal.

    摘要翻译： 可以正确跟随偏心卡盘的偏心的磁盘或光盘装置利用具有均匀间隔的时钟标记的数据轨道的盘来操作，以提供定时标准，并且包括安装在可转动臂上的再现头，其布置成相对于 盘和头部行进的径向位置检测器，其附接到臂，其检测旋转角度并产生头部位置信号。 检测并使用归属索引信号以及径向位置信号和导出的时钟信号来测量存储在存储器中并随后被访问以用于产生用于提供偏心调整时钟的相位锁定环路的控制信号的偏心量值 信号。

    Head displacement measuring method and apparatus and data recording/reproducing method and apparatus
    8.
    发明授权
    Head displacement measuring method and apparatus and data recording/reproducing method and apparatus 失效
    头位移测量方法和装置以及数据记录/再现方法和装置

    公开(公告)号：US6144516A

    公开(公告)日：2000-11-07

    申请号：US828388

    申请日：1997-03-28

    申请人： Toru Takeda ,  Satoru Seko ,  Takehisa Ishida

    发明人： Toru Takeda ,  Satoru Seko ,  Takehisa Ishida

    IPC分类号： G11B5/012 ,  G11B5/55 ,  G11B5/596 ,  G11B20/10 ,  G11B27/36 ,  G11B21/02

    CPC分类号： G11B5/59633 ,  G11B27/36 ,  G11B5/012 ,  G11B5/5534 ,  G11B20/10009 ,  G11B2220/20

    摘要： In a head displacement measuring method, prior to actual data recording or data reproduction, either one of the recording head and the reproducing head is wobbled, and the test data is recorded in the disk-shaped recording medium by the recording head. Then, the test data is reproduced from the test data by the reproducing head, and displacement between the recording head and the reproducing head is detected on the basis of the reproduced test data. Thus, the displacement may be detected more easily with higher precision than with the conventional optical detecting method.

    摘要翻译： 在头位移测量方法中，在实际数据记录或数据再现之前，记录头和再现头中的任一个是摆动的，并且测试数据被记录头记录在盘形记录介质中。 然后，通过再现头从测试数据再现测试数据，并且基于再现的测试数据检测记录头和再现头之间的位移。 因此，与常规光学检测方法相比，可以以更高的精度更容易地检测位移。

    Head displacement measuring method and apparatus and data recording/reproducing method and apparatus
    10.
    发明授权
    Head displacement measuring method and apparatus and data recording/reproducing method and apparatus 失效
    头位移测量方法和装置以及数据记录/再现方法和装置

    公开(公告)号：US5654842A

    公开(公告)日：1997-08-05

    申请号：US519405

    申请日：1995-08-25

    申请人： Toru Takeda ,  Satoru Seko ,  Takehisa Ishida

    发明人： Toru Takeda ,  Satoru Seko ,  Takehisa Ishida

    IPC分类号： G11B5/012 ,  G11B5/55 ,  G11B5/596 ,  G11B20/10 ,  G11B27/36

    CPC分类号： G11B5/59633 ,  G11B27/36 ,  G11B5/012 ,  G11B5/5534 ,  G11B20/10009 ,  G11B2220/20

    摘要： In a head displacement measuring method, prior to actual data recording or data reproduction, either one of the recording head and the reproducing head is wobbled, and the test data is recorded in the disk-shaped recording medium by the recording head. Then, the test data is reproduced from the test data by the reproducing head, and displacement between the recording head and the reproducing head is detected on the basis of the reproduced test data. Thus, the displacement may be detected more easily with higher precision than with the conventional optical detecting method.

    摘要翻译： 在头位移测量方法中，在实际数据记录或数据再现之前，记录头和再现头中的任一个是摆动的，并且测试数据被记录头记录在盘形记录介质中。 然后，通过再现头从测试数据再现测试数据，并且基于再现的测试数据检测记录头和再现头之间的位移。 因此，与常规光学检测方法相比，可以以更高的精度更容易地检测位移。