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1.发明授权
公开(公告)号：US6091562A
公开(公告)日：2000-07-18
申请号：US475062
申请日：1995-06-07
CPC分类号： G11B5/012 , G11B20/10009 , G11B5/09 , G11B2005/0018
摘要： A digital magnetic reproducing apparatus comprises a reproducing head to reproduce data from a magnetic recording medium; an equalizer for shaping, by a partial response method, the waveform of the reproduced signal outputted from the reproducing head; and a decoder for decoding, by a maximum likelihood decoding method, the equalized reproduced signal obtained from the equalizer. The reproducing head employed in this apparatus is an MR (magnetoresistance effect) head which is capable of reducing the second harmonic distortion of the reproduced signal to be -25 dB or lower. Therefore the deterioration of the bit error rate that may result from the nonlinear distortion of the MR head can be further lowered within a sufficiently suppressed range in practical use.
摘要翻译： 数字磁再现装置包括：再现头，用于从磁记录介质再现数据; 均衡器，用于通过部分响应方法来形成从再现头输出的再现信号的波形; 以及解码器，用于通过最大似然解码方法对从均衡器获得的均衡的再现信号进行解码。 在该装置中使用的再现头是能够将再现信号的二次谐波失真降低到-25dB或更低的MR（磁阻效应）头。 因此，在实际使用中，可以在充分抑制的范围内进一步降低由MR磁头的非线性失真引起的误码率的劣化。
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2.发明授权
公开(公告)号：US6122126A
公开(公告)日：2000-09-19
申请号：US475374
申请日：1995-06-07
CPC分类号： G11B5/012 , G11B20/10009 , G11B5/09 , G11B2005/0018
摘要： A digital magnetic reproducing apparatus comprises a reproducing head to reproduce data from a magnetic recording medium; an equalizer for shaping, by a partial response method, the waveform of the reproduced signal outputted from the reproducing head; and a decoder for decoding, by a maximum likelihood decoding method, the equalized reproduced signal obtained from the equalizer. The reproducing head employed in this apparatus is an MR (magnetoresistance effect) head which is capable of reducing the second harmonic distortion of the reproduced signal to be -25 dB or lower. Therefore the deterioration of the bit error rate that may result from the nonlinear distortion of the MR head can be further lowered within a sufficiently suppressed range in practical use.
摘要翻译： 数字磁再现装置包括：再现头，用于从磁记录介质再现数据; 均衡器，用于通过部分响应方法来形成从再现头输出的再现信号的波形; 以及解码器，用于通过最大似然解码方法对从均衡器获得的均衡的再现信号进行解码。 在该装置中使用的再现头是能够将再现信号的二次谐波失真降低到-25dB或更低的MR（磁阻效应）头。 因此，在实际使用中，可以在充分抑制的范围内进一步降低由MR磁头的非线性失真引起的误码率的劣化。
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3.发明授权Magnetic disk recording and playback apparatus using independently positioned recorded pattern sets for clock generation 失效使用独立定位的记录图案集的磁盘记录和重放装置用于时钟产生
公开(公告)号：US5786954A
公开(公告)日：1998-07-28
申请号：US840414
申请日：1997-04-29
CPC分类号： G11B20/10055 , G11B20/10009 , G11B20/10222 , G11B20/1403 , G11B27/3027 , G11B5/012 , G11B5/09 , G11B5/4886 , G11B2220/20
摘要： A highly reliable magnetic recording and playback apparatus utilizes an independent magnetic clock pattern region and a pattern set region to provide a common timing reference between a data recording region and its adjacent tracks. In the apparatus, the pattern set region provides a reference point so that the circumferential location of the magnetic pattern region can be determined. In one embodiment, the apparatus includes elements for playback of reproduced information recorded on a magnetic disk and an arrangement which provides for the generation of a data existing point clock.
摘要翻译： 高度可靠的磁记录和重放装置利用独立的磁时钟图形区域和图案组区域来提供数据记录区域和其相邻轨道之间的公共定时参考。 在该装置中，图案集区域提供参考点，使得可以确定磁图案区域的周向位置。 在一个实施例中，该装置包括用于回放记录在磁盘上的再现信息的元件以及用于产生数据存在点时钟的装置。
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4.发明授权Magnetic disk recording and playback apparatus using independently formed recorded pattern sets for clock generation 失效使用独立形成的用于时钟产生的记录图案集的磁盘记录和重放装置
公开(公告)号：US5828510A
公开(公告)日：1998-10-27
申请号：US800551
申请日：1997-02-18
CPC分类号： G11B20/10055 , G11B20/10009 , G11B20/10222 , G11B20/1403 , G11B27/3027 , G11B5/012 , G11B5/09 , G11B5/4886 , G11B2220/20
摘要： A highly reliable magnetic record playback apparatus utilizes an independent magnetic clock pattern region and a pattern set region to provide a common timing reference between a data recording region and its adjacent tracks. In the apparatus, the pattern set region provides a reference point so that the circumferential location of the magnetic pattern region can be determined. In one embodiment, the apparatus includes elements for playback of reproduced information recorded on a magnetic disk and an arrangement which provides for the generation of a data existing point clock.
摘要翻译： 高度可靠的磁记录重放装置利用独立的磁时钟图形区域和图案组区域来在数据记录区域和其相邻轨道之间提供公共定时参考。 在该装置中，图案集区域提供参考点，使得可以确定磁图案区域的周向位置。 在一个实施例中，该装置包括用于回放记录在磁盘上的再现信息的元件以及用于产生数据存在点时钟的装置。
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5.发明授权Magnetic disk recording and playback apparatus using independently formed recorded pattern sets for clock generation 失效使用独立形成的用于时钟产生的记录图案集的磁盘记录和重放装置
公开(公告)号：US5828509A
公开(公告)日：1998-10-27
申请号：US471243
申请日：1995-06-06
CPC分类号： G11B20/10055 , G11B20/10009 , G11B20/10222 , G11B20/1403 , G11B27/3027 , G11B5/012 , G11B5/09 , G11B5/4886 , G11B2220/20
摘要： A highly reliable magnetic recording and playback apparatus utilizes an independent magnetic clock pattern region and a pattern set region to provide a common timing reference between a data recording region and its adjacent tracks. In the apparatus, the pattern set region provides a reference point so that the circumferential location of the magnetic pattern region can be determined. In one embodiment, the apparatus includes elements for playback of reproduced information recorded on a magnetic disk and an arrangement which provides for the generation of a data existing point clock.
摘要翻译： 高度可靠的磁记录和重放装置利用独立的磁时钟图形区域和图案组区域来提供数据记录区域和其相邻轨道之间的公共定时参考。 在该装置中，图案集区域提供参考点，使得可以确定磁图案区域的周向位置。 在一个实施例中，该装置包括用于回放记录在磁盘上的再现信息的元件以及用于产生数据存在点时钟的装置。
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6.发明授权Apparatus which performs an ID operation simultaneously with a servo operation using a data recording medium with the ID area recorded immediately before the servo area 失效使用具有在伺服区域之前记录的ID区域的数据记录介质与伺服操作同时进行ID操作的装置
公开(公告)号：US5796534A
公开(公告)日：1998-08-18
申请号：US543498
申请日：1995-10-16
IPC分类号： G11B20/10 , G11B5/55 , G11B5/596 , G11B7/007 , G11B7/09 , G11B11/105 , G11B20/12 , G11B21/08 , G11B21/10 , G11B27/30 , G11B5/02
CPC分类号： G11B5/5526 , G11B20/1252 , G11B21/083 , G11B27/3027 , G11B5/5547 , G11B11/10578 , G11B2020/10916 , G11B21/10 , G11B2220/20 , G11B5/59655 , G11B7/00745 , G11B7/0938
摘要： To increase the recording capacity of a magnetic disc, tracks of this magnetic disc are divided into a number of sectors, with each sector being formed from a number of segments. Each segment is basically made up of a data region and a servo region with data being recorded on the data region and a clock pattern which becomes the basis for generation of a clock, a fine pattern which becomes the basis for the tracking operation, and an access pattern which becomes the basis for a seek operation being recorded on the servo region. An ID region and servo region are formed before the data region and servo region which make up the leading segment with the sector ID for this region being recorded in this ID region. After this ID has been read from this ID region, while it is being determined whether or not this ID is the same as the designated ID, the servo operation corresponding to the servo control signal occurring in the servo region is carried out. In this way, the recording of data corresponding to the data in the data region can commence straight after the ID has been decided upon.
摘要翻译： 为了增加磁盘的记录容量，该磁盘的轨道被划分成多个扇区，每个扇区由多个段形成。 每个段基本上由数据区域和伺服区域组成，其中数据被记录在数据区域上，时钟模式成为时钟的基础，成为跟踪操作的基础的精细模式，以及 作为搜索操作的基础的访问模式被记录在伺服区域上。 ID区域和伺服区域形成在构成前导段的数据区域和伺服区域之间，该区域的扇区ID被记录在该ID区域中。 在从该ID区域读取该ID之后，当确定该ID是否与指定的ID相同时，执行与伺服区域中出现的伺服控制信号相对应的伺服操作。 以这种方式，在确定了ID之后，与数据区域中的数据相对应的数据的记录可以直接开始。
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7.发明授权Disk recording and/or reproducing apparatus that compensates for bit nonlinearity and a phase shift introduced by separate read and write heads 失效磁盘记录和/或再现装置，其补偿位非线性和由单独的读写头引入的相移
公开(公告)号：US5600501A
公开(公告)日：1997-02-04
申请号：US531014
申请日：1995-09-20
CPC分类号： G11B5/09 , G11B20/10212 , G11B20/1403
摘要： There is disclosed a magnetic disk device of the external synchronization system using a head assembly of the recording/reproducing heads separation type. This magnetic device comprises: a reproducing head for reproducing data from a magnetic disk; a clock signal generator for generating a clock signal on the basis of a reproduced signal corresponding to a clock pattern from the reproducing head; a delay circuit for delaying recording data relative to the clock signal generated at the clock signal generator; a recording head for recording the recording data delayed by the delay circuit onto the magnetic disk; a position detecting circuit for detecting head position information (e.g., track number) in a disk radial direction of the recording head on the basis of the reproduced signal from the reproducing head; and a control circuit for controlling a quantity of delay of the delay circuit on the basis of head position information from the position detecting circuit and a predetermined magnetization reversal pattern.
摘要翻译： 公开了使用记录/再现头分离型的头组件的外部同步系统的磁盘装置。 该磁性装置包括：用于从磁盘再现数据的再现头; 时钟信号发生器，用于根据与来自再现头的时钟模式相对应的再现信号产生时钟信号; 延迟电路，用于相对于在时钟信号发生器处产生的时钟信号延迟记录数据; 用于将由延迟电路延迟的记录数据记录到磁盘上的记录头; 位置检测电路，用于根据来自再现头的再现信号来检测记录头的磁盘径向的磁头位置信息（例如磁道号）; 以及控制电路，用于根据来自位置检测电路的磁头位置信息和预定的磁化反转模式来控制延迟电路的延迟量。
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公开(公告)号：US07433145B2
公开(公告)日：2008-10-07
申请号：US10732522
申请日：2003-12-11
申请人： Hiroaki Yada , Keitaro Yamashita
发明人： Hiroaki Yada , Keitaro Yamashita
IPC分类号： G11B19/02
CPC分类号： G11B5/127 , G11B5/5526
摘要： Disclosed herein is a magnetic disk apparatus such as a hard disk apparatus or a removable hard disk apparatus which allows switching of the speed of rotation of a magnetic disk while assuring a sufficient tracking control characteristic and a sufficient capacity. More concretely, a magnetic disk apparatus of the present invention, in which tracking of a magnetic head is controlled with reference to a plurality of servo areas formed at predetermined angular distances on a magnetic disk to access the magnetic disk, includes; the servo areas being formed in synchronism with a fixed clock signal such that reference patterns for tracking control are formed therein, a clock generation means for generating a clock signal common to the plurality of servo areas with reference to reproduction signals obtained from the servo areas, a tracking control signal generation means for generating a control signal for tracking control from the reference patterns with reference to the clock signal, a tracking control means for controlling tracking of said magnetic head with reference to the control signal, and a speed switching means for switching the speed of rotation of the magnetic disk.
摘要翻译： 这里公开了一种磁盘装置，例如硬盘装置或可移动硬盘装置，其允许切换磁盘的旋转速度，同时确保足够的跟踪控制特性和足够的容量。 更具体地，本发明的磁盘装置，其中参照在磁盘上以预定角度距离形成的多个伺服区域来控制磁头的跟踪以访问磁盘，包括： 伺服区域与固定的时钟信号同步形成，使得在其中形成用于跟踪控制的参考模式;时钟产生装置，用于参考从伺服区域获得的再现信号产生多个伺服区域共用的时钟信号， 跟踪控制信号产生装置，用于根据时钟信号产生用于从参考图形跟踪控制的控制信号;跟踪控制装置，用于参照控制信号控制所述磁头的跟踪;以及速度切换装置，用于切换 磁盘的旋转速度。
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9.发明授权Method and apparatus for driving a recording medium, method and system for recording and reproducing information, and information supplying medium 失效用于驱动记录介质的方法和装置，用于记录和再现信息的方法和系统以及信息提供介质公开(公告)号：US06697958B1
公开(公告)日：2004-02-24
申请号：US09471789
申请日：1999-12-23
申请人： Hiroaki Yada , Hiroshi Kanno
发明人： Hiroaki Yada , Hiroshi Kanno
IPC分类号： G06F1100
CPC分类号： G11B20/18 , G11B19/04 , G11B2020/10916
摘要： A disk drive for recording information on and reproducing information from a hard disk drive. The CPU of a host device controls the maximum allowable number of retries, or the maximum period of time allowed for retries, performed by the disk drive when an error occurs in a seek, record, or reproduce operation.
摘要翻译： 用于在硬盘驱动器上记录和再现信息的磁盘驱动器。 主机设备的CPU控制在寻道，记录或再现操作中发生错误时由磁盘驱动器执行的最大允许重试次数或重试允许的最长时间。
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公开(公告)号：US5815333A
公开(公告)日：1998-09-29
申请号：US579551
申请日：1995-12-27
申请人： Noriyuki Yamamoto , Hiroaki Yada
发明人： Noriyuki Yamamoto , Hiroaki Yada
CPC分类号： G11B5/012 , G11B5/5526 , G11B5/82 , G11B5/59644 , G11B5/59655
摘要： A magnetic disc having a ROM area and a RAM area which are separated. The ROM only plane and the RAM only plane are separated on the magnetic disc.
摘要翻译： 具有分离的ROM区域和RAM区域的磁盘。 仅ROM平面和仅RAM平面在磁盘上分离。
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