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    • 4. 发明授权
    • Disk drive loading/unloading apparatus and method for controlling the apparatus
    • 磁盘驱动装载装置及控制装置的方法
    • US06229663B1
    • 2001-05-08
    • US09102971
    • 1998-06-22
    • Isao YonedaHiroshi UchiikeShinji UenoKenji OgasawaraYoshihiko AokiFuminori Sai
    • Isao YonedaHiroshi UchiikeShinji UenoKenji OgasawaraYoshihiko AokiFuminori Sai
    • G11B2112
    • G11B19/28G11B5/54G11B19/04G11B21/12
    • The present invention provides a disk drive, a loading/unloading apparatus, and a method for controlling the apparatus, capable of improving the reliability of data by performing stable speed control. A disk drive comprises a VCM spindle driver for rotating a disk, a magnetic head, an actuator mechanism for moving a head slider having the magnetic head to a position above the surface of the magnetic disk and an unloaded position, a ramp block, and a CPU/HDC for performing the speed control of an actuator and the calibration control for detecting the offset and dynamic range of an AD converter before the speed control and controlling the operation for reading or writing data from or into the disk, which increases a rectangular current value to be applied to a voice coil while successively changing codes, measures an offset in accordance with the AD converter value for each current value, and moreover measures a dynamic range by deciding a nonlinear area when the difference between the expected value and measured value of the AD converter becomes a predetermined value or more.
    • 本发明提供一种磁盘驱动器,装载/卸载装置以及用于控制装置的方法,能够通过执行稳定的速度控制来提高数据的可靠性。 磁盘驱动器包括用于旋转磁盘的VCM主轴驱动器,磁头,用于将具有磁头的磁头滑块移动到磁盘表面上方的位置的致动机构,以及卸载位置,斜坡块和 用于执行致动器的速度控制的CPU / HDC和用于在速度控制之前检测AD转换器的偏移和动态范围的校准控制,并且控制用于从盘读取或写入数据的操作,这增加了矩形电流 在连续更改代码的同时应用于音圈的值,根据每个当前值的AD转换器值测量偏移量,并且当预期值和测量值之间的差值决定非线性区域时,测量动态范围 AD转换器变为预定值以上。
    • 5. 发明授权
    • Data recording disk and disk drive device for reducing wasted space on a data recording disk
    • 数据记录磁盘和磁盘驱动器设备,用于减少数据记录磁盘上浪费的空间
    • US06466387B1
    • 2002-10-15
    • US09124271
    • 1998-07-29
    • Kenji OgasawaraHiroshi YanagisawaKeiji Kobayashi
    • Kenji OgasawaraHiroshi YanagisawaKeiji Kobayashi
    • G11B509
    • G11B5/012G11B5/035G11B5/4886
    • The present invention solves a problem that useless or wasted space exists on a data recording disk between read/write heads of narrower head width than others in the case that an uniform track pitch is used, and a head width of each head varies due to a fabrication tolerance. A data recording disk of the present invention comprises a first data recording surface and a second data recording surface, and a track pitch of adjacent data recording tracks of the first data recording surface differs from a track pitch of adjacent data recording tracks of the second data recording surface. All data recording tracks of the first data recording surface have substantially the same track width, and all gaps of the first data recording surface have substantially the same gap width, and, all data recording tracks of the second data recording surface have substantially the same track width, and all gaps of the second data recording surface have substantially the same gap width.
    • 本发明解决了在使用均匀的轨道间距的情况下,在头部宽度较窄的读/写头之间的数据记录盘上存在无用或浪费的空间的问题,并且每个头的头部宽度由于 制造公差。 本发明的数据记录盘包括第一数据记录表面和第二数据记录表面,并且第一数据记录表面的相邻数据记录磁道的磁道间距与第二数据的相邻数据记录磁迹的磁道间距不同 记录表面。 第一数据记录表面的所有数据记录轨道具有基本相同的轨道宽度,并且第一数据记录表面的所有间隙具有基本上相同的间隙宽度,并且第二数据记录表面的所有数据记录轨迹具有基本相同的轨迹 宽度和第二数据记录表面的所有间隙具有基本上相同的间隙宽度。
    • 6. 发明授权
    • Magnetic recording medium magnetic head positioning method, and magnetic
recording apparatus
    • 磁记录介质磁头定位方法及磁记录装置
    • US5905603A
    • 1999-05-18
    • US510173
    • 1995-08-02
    • Kenji OgasawaraHiroshi YanagisawaKoji Kurachi
    • Kenji OgasawaraHiroshi YanagisawaKoji Kurachi
    • G11B21/10G11B5/55G11B5/596
    • G11B5/59655G11B5/553G11B5/59688
    • A method and apparatus for accurately positioning the magnetic head of disk drives is disclosed. A recording medium is provided having two radial data structures formed thereon. Each radial data structure includes two parallel and adjacent data burst pattern trains. The first burst pattern is defined by a first side centrally aligned with a concentric data track and a second side opposed to the first side and centrally aligned with an adjacent concentric data track. The third burst pattern is defined by a third side spaced apart from the first side of the first burst pattern by a distance not greater than the read width of a magnetic head and a fourth side opposed to the third side and spaced apart from the second side by a distance not greater than the read width. The first radial data structure generates a first signal for positioning the magnetic head relative to the recording medium. The second radial data structure, parallel and offset from the first data structure, generates a second head position signal. Thus, the second head position signal is detected before the first head position signal becomes undetectable.
    • 公开了一种用于精确定位磁盘驱动器的磁头的方法和装置。 提供具有形成在其上的两个径向数据结构的记录介质。 每个径向数据结构包括两个并行和相邻的数据突发模式列。 第一突发图案由与同心数据轨道集中对准的第一侧和与第一侧相对并且与相邻同心数据轨道居中对准的第二侧限定。 第三突发图案由与第一突发图案的第一侧间隔开的距离不大于磁头的读取宽度的第三侧和与第三侧相对并与第二侧相隔开的第四侧限定 距离不大于读宽度。 第一径向数据结构产生用于相对于记录介质定位磁头的第一信号。 与第一数据结构平行和偏移的第二径向数据结构产生第二头位置信号。 因此,在第一头部位置信号变得不可检测之前检测到第二头部位置信号。