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71. 发明授权

US6055121A Optimizing track address detection in a disc drive 失效
标题翻译：优化磁盘驱动器中的磁道地址检测
公开(公告)号：US6055121A
公开(公告)日：2000-04-25
申请号：US920592
申请日：1997-08-29
申请人： Ke Du , William C. Little , Matthew C. Burton
发明人： Ke Du , William C. Little , Matthew C. Burton
IPC分类号： G11B5/596
CPC分类号： G11B5/59644
摘要： An apparatus and method for optimizing detection thresholds used to identify addresses of tracks in a disc drive having a head and a disc upon which a plurality of tracks are defined, the tracks including track address fields in which track address information is stored. A comparator is provided which generates track address sequence signals in response to a corresponding plurality of readback signals obtained as the head is maintained in a fixed relationship to a selected track. A demodulator identifies erroneous track address sequence signals therefrom and increments a count in an accumulator for each detected, erroneous signal. A detection threshold circuit sequentially provides the comparator with a set of detection thresholds from a population of detection thresholds, each of which are used in turn by the comparator. An optimal set of thresholds is thereby selected for use by the disc drive in accordance with the relative number of erroneous track address sequence signals accumulated for each of the detection thresholds from the population.
摘要翻译：一种用于优化检测阈值的装置和方法，用于识别具有头和盘的盘驱动器中的轨道的地址，轨道地址信息被存储在轨道地址字段中。提供比较器，其响应于当头被保持与所选轨道的固定关系时获得的对应的多个回读信号而产生轨道地址序列信号。解调器从其识别错误的轨道地址序列信号，并为每个检测到的错误信号增加累加器中的计数。检测阈值电路依次向比较器提供一组检测阈值，每个检测阈值由比较器依次使用。因此，根据从群体中的每个检测阈值积累的错误轨道地址序列信号的相对数目，选择最佳阈值集合供磁盘驱动器使用。

72. 发明授权

US6052244A Servo signal processing apparatus, recorded data reading apparatus and method for processing servo signal 失效
公开(公告)号：US6052244A
公开(公告)日：2000-04-18
申请号：US994598
申请日：1997-12-23
申请人： Hiroko Haraguchi , Masaru Sawada
发明人： Hiroko Haraguchi , Masaru Sawada
IPC分类号： G11B5/55 , G11B5/596 , G11B19/247 , G11B21/08 , G11B21/10 , G11B5/09 , G11B5/035
CPC分类号： G11B21/10 , G11B19/247 , G11B21/083 , G11B5/5526 , G11B5/59605 , G11B5/59644 , G11B5/59655
摘要： A servo signal processing apparatus for processing a servo signal corresponding to servo information from a servo area on a recording medium for controlling a head. The servo area includes a servo mark area for storing a servo mark indicative of a head of the servo area, a gray mark area for storing a gray mark indicative of a head of information for position control for the head, and a gray code area for storing information. An A-D converter converts the servo signal to digital data. A digital filter filters the converted data based on a sampling clock, and outputs the filtered digital data. A servo mark detector detects a servo mark based on a continuity of a first predetermined logical value. A gray code decoder detects a gray code based on a continuity of a predetermined logical value. The gray code decoder decodes information stored in a gray code area following the detected gray mark.

73. 发明授权

US6031680A Methods and systems for self-servowriting including maintaining a reference level within a usable dynamic range 失效
公开(公告)号：US6031680A
公开(公告)日：2000-02-29
申请号：US45479
申请日：1998-03-20
申请人： Timothy Joseph Chainer , Mark Delorman Schultz , Bucknell Chapman Webb , Edward John Yarmchuk
发明人： Timothy Joseph Chainer , Mark Delorman Schultz , Bucknell Chapman Webb , Edward John Yarmchuk
IPC分类号： G11B5/48 , G11B5/55 , G11B5/596 , G11B21/08 , G11B21/10 , G11B27/30 , G11B5/02
CPC分类号： G11B21/10 , G11B21/081 , G11B21/083 , G11B21/085 , G11B21/106 , G11B27/3027 , G11B5/5534 , G11B5/59633 , G11B5/59644 , G11B5/59655 , G11B5/59688 , G11B5/4886 , G11B5/59627
摘要： Methods and systems for self-servowriting a data storage medium are disclosed, including servoing to propagation bursts of a propagation pattern located in tracks other than an immediately preceding track. Reference levels used to position a recording head are accordingly kept in a usable dynamic range necessary to keep servo track spacing constant across the medium. The methods and systems are disclosed in connection with a rotary actuator having spaced read and write heads. Similar methods are disclosed for writing trigger or timing bursts of the propagation pattern.

74. 发明授权

US6008962A Method and apparatus for providing read and write skew offset information for a magneto-resistive head 失效
标题翻译：用于为磁阻头提供读和写偏斜偏移信息的方法和装置
公开(公告)号：US6008962A
公开(公告)日：1999-12-28
申请号：US641685
申请日：1996-05-01
申请人： Me Van Le , Jong-Ming Lin
发明人： Me Van Le , Jong-Ming Lin
IPC分类号： G11B20/20 , G11B5/596
CPC分类号： G11B5/59644
摘要： The present invention is a method and apparatus for generating a skew or position offset signal for aligning the read element of an MR head with the centerline of written data, during a read operation. The disk has a plurality of tracks, one of which contains a calibration burst that allow the read element to be centered with the centerline of written data. This is accomplished by first writing the calibration burst on a predetermined number of sectors of the track. A profile of the calibration burst is obtained by micro-jogging the head from a first position that is -50% from the track centerline to a second position that is +50% of the track centerline, and sensing the magnitude of the calibration burst in various increments between the first and the second positions. For each microjogging position, the magnitude of the calibration burst is obtained. The microjogging position corresponding to the peak value of the calibration burst represents the offset between the read and the write elements. The offset signal is stored in memory and used in a servo routine to center the MR head during a read operation. The calibration burst may be included in a single track, a predetermined number of tracks, or on every track of the disk.
摘要翻译：本发明是一种用于在读取操作期间产生用于使MR磁头的读取元件与写入数据的中心线对准的偏斜或位置偏移信号的方法和装置。磁盘具有多个磁道，其中之一包含允许读取元件与写入数据的中心线居中的校准突发。这是通过首先在轨道的预定数量的扇区上写入校准脉冲串来实现的。校准脉冲串的曲线是通过从头部从轨道中心线的-50％的第一位置微跑到磁迹中心线的+ 50％的第二位置来获得的，并且检测校准脉冲串的幅度在第一和第二位置之间的各种增量。对于每个微距离位置，获得校准脉冲串的幅度。对应于校准脉冲串的峰值的微距位置表示读取和写入元件之间的偏移。偏移信号存储在存储器中，并用于伺服程序，以在读取操作期间使MR磁头居中。校准脉冲串可以包括在单个磁道，预定数量的磁道中，或者在磁盘的每个磁道上。

75. 发明授权

US5978170A Recording/reproducing apparatus and servo-information recording method 失效
标题翻译：记录/再现装置和伺服信息记录方法
公开(公告)号：US5978170A
公开(公告)日：1999-11-02
申请号：US865552
申请日：1997-05-29
申请人： Yasunori Izumiya , Gen Ohshima , Taturo Sasamoto
发明人： Yasunori Izumiya , Gen Ohshima , Taturo Sasamoto
IPC分类号： G11B20/12 , G11B5/55 , G11B5/596 , G11B21/08 , G11B21/10 , G11B27/10 , G11B5/09
CPC分类号： G11B5/5526 , G11B5/59644 , G11B5/59655 , G11B5/59688
摘要： An index determining unit determines that a current position in a disk medium corresponds to a true index when reaching a true index pattern of servo information recorded in the disk medium. The determination is used for reading predetermined servo information so as to perform a servo control operation of a disk reading/writing head. The disk medium has the true index pattern in a first portion of the disk medium and also untrue index patterns of servo information in a predetermined number of second portions in proximity to the first portion along a track direction. The true index pattern and the untrue index patterns form a predetermined sequence. The index determining unit comprises a reading unit for reading the servo information recorded in the disk medium; a storing unit for storing the read servo information in series; and a determining unit for determining that a current position in the disk medium corresponds to the true index when the stored servo information includes a sequence which is different from the predetermined sequence by a predetermined error.
摘要翻译：索引确定单元当达到记录在盘介质中的伺服信息的真实索引模式时，确定盘介质中的当前位置对应于真实索引。该确定用于读取预定的伺服信息，以执行盘读/写头的伺服控制操作。磁盘介质在磁盘介质的第一部分中具有真实的索引图案，并且还沿着沿着磁道方向的第一部分附近的预定数量的第二部分中的伺服信息的索引图案是不正确的。真实的索引图案和不真实的索引图案形成预定的顺序。索引确定单元包括用于读取记录在盘介质中的伺服信息的读取单元; 存储单元，用于串行存储读取的伺服信息; 以及确定单元，用于当所存储的伺服信息包括与预定序列不同的序列预定误差时，确定盘介质中的当前位置对应于真实索引。

76. 发明授权

US5940237A Disk medium whose track density is changed in a radial direction and disk apparatus using the same disk medium 失效
标题翻译：磁道密度在径向上变化的磁盘介质和使用相同磁盘介质的磁盘设备
公开(公告)号：US5940237A
公开(公告)日：1999-08-17
申请号：US889003
申请日：1997-07-07
申请人： Masahiro Takagi
发明人： Masahiro Takagi
IPC分类号： G11B5/012 , G11B5/48 , G11B5/55 , G11B5/596 , G11B20/12 , G11B21/08 , G11B21/02
CPC分类号： G11B5/012 , G11B20/12 , G11B21/083 , G11B5/59633 , G11B5/4886 , G11B5/5534 , G11B5/5547 , G11B5/59644
摘要： A disk apparatus includes a disk medium for recording information in a track provided on the disk medium, a rotation circuit for rotating the disk medium, and a head for recording-and-reproducing to-and-from the disk medium. The head further includes a recording head element and a reproducing head element arranged along the track at a given gap from each other. The disk apparatus further includes a driving control circuit for swinging the head to a given position in a radial direction of the disk medium. In the disk apparatus, the disk medium is formatted by changing a track pitch in the radial direction of the disk medium.
摘要翻译：盘装置包括用于在盘介质上提供的轨道中记录信息的盘介质，用于旋转盘介质的旋转电路和用于从盘介质进行记录和再现的头。磁头还包括一个记录头元件和一个再现磁头元件，沿着轨道以一个给定的间隙彼此布置。盘装置还包括驱动控制电路，用于将磁头旋转到盘介质的径向方向上的给定位置。在盘装置中，通过改变盘介质的径向的轨道间距来格式化盘介质。

77. 发明授权

US5867343A Method and apparatus for storing position offset information on a hard drive assembly cylinder 失效
公开(公告)号：US5867343A
公开(公告)日：1999-02-02
申请号：US713872
申请日：1996-09-13
申请人： Me Van Le , Jong-Ming Lin
发明人： Me Van Le , Jong-Ming Lin
IPC分类号： G11B20/20 , G11B5/596
CPC分类号： G11B5/59644
摘要： A method and apparatus for storing position offset information not used for aligning the read element of an MR head with the centerline of written data, during a read operation. The skew or offset between the read and the write elements on a read head is first calibrated. The offset information then stored on one or more dedicated tracks of the disk. To accomplish this, the write element is aligned with the centerline of the dedicated track. The position offset information is then written in the data field of the dedicated track. During the power-on process, the read element is aligned with the centerline of the dedicated track and the position offset information may be retrieved by simply reading the information previously stored on the dedicated track.

78. 发明授权

US5801895A Disk drive servo demodulation system which suppresses noise on the position error signal 失效
标题翻译：磁盘驱动伺服解调系统抑制位置误差信号的噪声
公开(公告)号：US5801895A
公开(公告)日：1998-09-01
申请号：US653898
申请日：1996-05-28
申请人： Daniel Y. Abramovich
发明人： Daniel Y. Abramovich
IPC分类号： G11B5/012 , G11B5/55 , G11B5/596
CPC分类号： G11B5/553 , G11B5/012 , G11B5/59627 , G11B5/59644 , G11B5/59683 , G11B5/59688
摘要： A disk drive servo system which provides a position error signal with an increased signal to noise ratio. Mixing waveforms are generated for mixing with dibit burst signals created when a transducer on a recording head of a disk drive magnetically couples to reference position dibits located on a magnetic surface of the disk drive. The mixing waveforms are formed from a finite integer number of sine waves which are coherent with the dibit burst signals. The mixed dibit burst signal are integrated and summed to create the position error signal. Customizing the mixing waveforms allows the signal to noise ratio of the position error signal to be maximized when a magneto-resistive transducer within the disk drive servo system has one of several non-ideal characteristics.
摘要翻译：一种磁盘驱动器伺服系统，其提供具有增加的信噪比的位置误差信号。产生混合波形，用于当磁盘驱动器的记录头上的换能器磁耦合到位于磁盘驱动器的磁性表面上的参考位置的两比特时产生的双突发信号。混合波形由与双位脉冲信号相干的有限整数正弦波形成。混合的双脉冲串信号被积分并相加以产生位置误差信号。定制混合波形允许当磁盘驱动器伺服系统中的磁阻换能器具有若干非理想特性之一时，使位置误差信号的信噪比最大化。

79. 发明授权

US5777816A Data track following method for disc drives 失效
标题翻译：磁盘驱动器的数据跟踪方法
公开(公告)号：US5777816A
公开(公告)日：1998-07-07
申请号：US60858
申请日：1993-05-12
申请人： Randall D. Hampshire , Philip R. Woods
发明人： Randall D. Hampshire , Philip R. Woods
IPC分类号： G11B5/55 , G11B5/596 , G11B21/10
CPC分类号： G11B5/5534 , G11B21/106 , G11B5/5565 , G11B5/59627 , G11B5/59644
摘要： A method for following a selected data track on a selected data surface of a disc drive of the type having a dedicated servo system in which guiding of data heads to follow data tracks on data surfaces is effected by positioning an actuator upon which the data heads are mounted in relation to the location of a servo head, also mounted on the actuator, with respect to servo tracks on a dedicated servo surface. The data tracks are organized into cylinders, each containing a servo track, and a selected data track is accessed by seeking to an optimum servo track displaced from the servo track in the cylinder containing the data track by an integral number of track spacings selected to compensate for misalignments greater than a track spacing between the data and servo heads. Data track following is then effected by offsetting the servo head from the optimum servo track to compensate for misalignments of less than a track spacing between the data and servo heads and tracks.
摘要翻译：一种用于跟踪具有专用伺服系统的盘式驱动器的选定数据表面上的选定数据轨迹的方法，其中数据头在数据表面上跟随数据轨道的引导通过将数据头位于其上的致动器安装在相对于专用伺服表面上的伺服磁道上安装在致动器上的伺服磁头的位置。数据轨道被组织成气缸，每个气缸都包含一个伺服轨道，并且通过寻求从包含数据轨道的气缸中的伺服轨道偏移的最佳伺服轨迹来访问所选择的数据磁道，该磁道选定为补偿的整数个磁道间隔对于大于数据和伺服头之间的磁道间隔的未对准。然后通过将伺服磁头从最佳伺服磁道偏移来补偿数据磁道跟随，以补偿数据与伺服磁头和磁道之间小于磁道间隔的不对准。

80. 发明授权

US5694267A Removable disk drive and protective device 失效
标题翻译：可移动磁盘驱动器和保护装置
公开(公告)号：US5694267A
公开(公告)日：1997-12-02
申请号：US724123
申请日：1996-09-30
申请人： James H. Morehouse , David M. Furay , James A. Dunckley , John A. Mount , Bernard J. Rondestvedt , Steven B. Volk
发明人： James H. Morehouse , David M. Furay , James A. Dunckley , John A. Mount , Bernard J. Rondestvedt , Steven B. Volk
IPC分类号： G11B5/11 , G11B5/48 , G11B5/54 , G11B5/55 , G11B5/596 , G11B19/20 , G11B21/10 , G11B25/04 , G11B31/00 , G11B33/12 , G11B33/08
CPC分类号： G11B33/121 , G11B19/2009 , G11B21/106 , G11B25/043 , G11B31/00 , G11B5/11 , G11B5/4886 , G11B5/54 , G11B5/5526 , G11B5/59622 , G11B5/59627 , G11B5/59644 , G11B5/5965 , Y10S360/903
摘要： A removable disk drive is combined with a protective device for use in a computer. The protective device is constructed as a jacket made of resilient material, the jacket enclosing at least a portion of the surface of the disk drive. In one embodiment, the disk drive includes a substantially rigid disk in a housing having a footprint that includes a first dimension of about 35 mm. In another embodiment, the removable disk drive includes a housing and a substantially rigid disk having a diameter in the range of from about 33 mm to about 34 mm.
摘要翻译：可移动磁盘驱动器与用于计算机的保护装置组合。保护装置构造为由弹性材料制成的护套，护套包围盘驱动器表面的至少一部分。在一个实施例中，盘驱动器在壳体中包括基本刚性的盘，其具有包括大约35mm的第一尺寸的足迹。在另一个实施例中，可移动磁盘驱动器包括外壳和直径在约33mm至约34mm范围内的基本上刚性的盘。

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