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1. 发明授权

US5761165A Disc device providing eccentricity compensation using a head radial position detecting circuit 失效
标题翻译：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。

2. 发明授权

US5905705A Disc device having eccentricity measurement and clock correction 失效
标题翻译：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。

3. 发明授权

US5745455A 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.

4. 发明授权

US5615191A Disc device having eccentricity measurement and clock correction 失效
标题翻译：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。

5. 发明授权

US5444371A Magnetic disk offset amount measuring apparatus 失效
标题翻译：磁盘偏移量测量装置
公开(公告)号：US5444371A
公开(公告)日：1995-08-22
申请号：US202494
申请日：1994-02-28
申请人： Itaru Tomisaki , Toru Takeda
发明人： Itaru Tomisaki , Toru Takeda
IPC分类号： G11B20/18 , G11B5/596 , G11B7/095 , G11B21/10 , G11B20/14 , G01R33/12
CPC分类号： G11B21/106 , G11B7/0953
摘要： An offset amount measuring apparatus for measuring an offset amount resulting from an offset produced when a disk, which is provided with a plurality of clock mark signals recorded around each circular data track at physically regular intervals, is mounted by chucking on a disk apparatus, reading the clock mark signals from the circular data track with a head, is disclosed. The apparatus comprises time interval measurement means for measuring the time interval between clock mark reproduced signals output from the head while the head is positioned at a distance of a predetermined radius from the center of rotation of the disk, offset amount calculation means for obtaining the distance between a locus of the head traced on the disk when the same is rotated and the circular data track from the time interval between the clock mark reproduced signals measured by the time interval measurement means, and offset amount storage means for storing the distance obtained by the offset amount calculation means as the offset amount in relation to the angle of rotation of the disk. By the use of this apparatus, it is possible to measure the offset amount electronically without using a mechanical measuring instrument, and precisely without decreasing the disk capacity.
摘要翻译：一种偏移量测量装置，用于测量当通过卡在盘装置上安装在每个循环数据轨道周围以物理规则的间隔记录多个时钟标记信号的盘产生的偏移产生的偏移量，公开了来自具有磁头的圆形数据磁道的时钟标记信号。该装置包括时间间隔测量装置，用于测量从头部输出的时钟标记再现信号之间的时间间隔，同时头部位于距盘的旋转中心预定半径的距离处;偏移量计算装置，用于获得距离在与由时间间隔测量装置测量的时钟标记再现信号之间的时间间隔中的旋转时在盘上跟踪的头部的轨迹和圆形数据轨道之间，以及偏移量存储装置，用于存储由偏移量计算装置作为与盘的旋转角相关的偏移量。通过使用该装置，可以在不使用机械测量仪器的情况下以电子方式测量偏移量，并且可以精确地不减小磁盘容量。

6. 发明授权

US5602690A Clock signal generating device and clock signal generating method 失效
标题翻译：时钟信号发生装置和时钟信号产生方法
公开(公告)号：US5602690A
公开(公告)日：1997-02-11
申请号：US375521
申请日：1995-01-19
申请人： Itaru Tomisaki , Toru Takeda
发明人： Itaru Tomisaki , Toru Takeda
IPC分类号： G11B20/14 , G11B27/30 , G11B21/02
CPC分类号： G11B27/30 , G11B20/1403 , G11B2220/20
摘要： A clock signal generating apparatus and method in which data recorded in a plurality of tracks and clock marks recorded at equal angular spaces at different radial distances on a rotating disk are reproduced by a reproducing head from the disk and a clock signal is generated in synchronism with the clock marks reproduced by the reproducing head by means of a discriminating circuit for detecting a synchronous state between the generated clock signal and the reproduced clock marks, a circuit for causing oscillation of the reproducing head in a radial direction of the disk over a plurality of tracks when the synchronous state discriminating circuit determines that the clock signal is not synchronous with the clock marks, and a phase-locked loop circuit for generating the clock signal in synchronism with the clock marks reproduced from the disk while the reproducing head is oscillated over the plurality of tracks by synchronizing on the clock marks reproduced at a variety of different radial positions on the disk as the disk is rotated.
摘要翻译：一种时钟信号发生装置和方法，其中记录在以旋转盘上的不同径向距离处的相等角度空间记录的多个轨道和时钟标记中的数据由盘的再现头再现，同时产生时钟信号通过用于检测所生成的时钟信号和再现的时钟标记之间的同步状态的识别电路，由再现头再现的时钟标记，用于使多个盘的再现头在盘的径向上的振荡的电路当同步状态鉴别电路确定时钟信号与时钟标记不同步时的轨迹;以及锁相环电路，用于在再现头在盘上振荡时与从盘再现的时钟标记同步地产生时钟信号通过在以各种不同的辐射再现的时钟标记上同步来进行多个轨道磁盘旋转时磁盘上的位置。

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