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    Servo data recovery circuit for disk drive having digital embedded sector servo
    3.
    发明授权
    Servo data recovery circuit for disk drive having digital embedded sector servo 失效
    具有数字嵌入式扇区伺服的磁盘驱动器的伺服数据恢复电路

    公开(公告)号：US5420730A

    公开(公告)日：1995-05-30

    申请号：US180096

    申请日：1994-01-11

    申请人： Ronald R. Moon ,  Daniel E. Barnard

    发明人： Ronald R. Moon ,  Daniel E. Barnard

    IPC分类号： G11B5/596 ,  G11B20/12

    CPC分类号： G11B5/5965 ,  G11B20/1258 ,  G11B5/59655 ,  G11B2020/10916 ,  G11B2020/1282 ,  G11B2020/1284

    摘要： A method and apparatus are provided for recovering servo information in a disk drive for positioning a data transducer head relative to concentric data tracks wherein the head reads user data encoded in a predetermined data code and reads servo information within plural servo sectors embedded in each data track defined on a storage surface of a rotating disk. The data tracks are arranged in plural groups of concentric tracks within concentric zones wherein each zone has a user data transfer rate selected in relation to disk radius, the servo information being recorded in at least three patterns within each embedded servo sector: a servo sync pattern, a user data code violating pattern, and a servo data bit pattern. A servo data recovery circuit implements the method comprising the steps of:timing expected arrival of a servo sector with a sector timer,at the expected arrival of the servo sector detecting a said servo sync pattern with a servo sync pattern detector,detecting at least one said user data code violating pattern with a user data code violating pattern detector,detecting recurrent servo data bit patterns as binary data bits with a data reader,determining presence of a servo address mark with a master state machine following detection of said at least one user data code violating pattern,upon detection of a servo address mark, restarting said sector timer,accumulating within the master state machine the detected binary data bits in order to detect a track identification number, andproviding the track identification number to a head position servo loop for use in positioning the head relative to the data tracks during track seeking operations of the disk drive. The data reader forms an independent aspect of the present invention.

    摘要翻译： 提供了一种方法和装置，用于在盘驱动器中恢复伺服信息，用于相对于同心数据轨道定位数据换能器头，其中头部读取以预定数据代码编码的用户数据，并读取嵌入每个数据轨道的多个伺服扇区内的伺服信息 限定在旋转盘的存储表面上。 数据磁道被布置在同心区域内的多组同心轨道中，其中每个区域具有相对于磁盘半径选择的用户数据传输速率，伺服信息以每个嵌入式伺服扇区内的至少三个模式记录：伺服同步模式 ，用户数据码违反模式，以及伺服数据位模式。 伺服数据恢复电路实现该方法，包括以下步骤：在伺服扇区预期到达时用伺服同步模式检测器检测伺服扇区与伺服扇区的预期到达，检测至少一个 所述用户数据代码违反模式与用户数据代码违反模式检测器，用数据读取器检测作为二进制数据位的复现伺服数据位模式，在检测到所述至少一个用户之后确定存在伺服地址标记与主状态机 数据代码违反模式，在检测到伺服地址标记时，重新启动所述扇区定时器，在主状态机内积累检测到的二进制数据位，以便检测轨道识别号码，并将磁道识别号提供给磁头位置伺服环路 用于在磁盘驱动器的磁道寻找操作期间相对于数据磁道定位磁头。 数据读取器形成本发明的独立方面。

    Micro miniature hard disk drive
    4.
    发明授权
    Micro miniature hard disk drive 失效
    微型微型硬盘驱动器

    公开(公告)号：US5291355A

    公开(公告)日：1994-03-01

    申请号：US850443

    申请日：1992-03-10

    申请人： Michael R. Hatch ,  Ronald R. Moon ,  Klaus-Peter Deyring ,  James A. McDonald, III ,  Thomas J. Huber ,  Gregg J. Uhlendorf ,  Daniel E. Barnard ,  Bryan T. Silbermann ,  Philip L. Steiner ,  Robert P. Cloutier ,  Robert J. Kobliska

    发明人： Michael R. Hatch ,  Ronald R. Moon ,  Klaus-Peter Deyring ,  James A. McDonald, III ,  Thomas J. Huber ,  Gregg J. Uhlendorf ,  Daniel E. Barnard ,  Bryan T. Silbermann ,  Philip L. Steiner ,  Robert P. Cloutier ,  Robert J. Kobliska

    IPC分类号： G11B5/012 ,  G11B5/54 ,  G11B20/12 ,  G11B25/04 ,  G11B33/12 ,  G11B33/14 ,  G11B17/02

    CPC分类号： G11B25/043 ,  G11B20/1252 ,  G11B33/1446 ,  G11B5/54

    摘要： A hard disk drive for a computer system including a head disk assembly with a disk platter of approximately one-and-eight-tenths-inch in diameter capable of storing more than forty megabytes. In an embodiment, data tracks on each data surface of the platter are spaced at approximately 2,558 tracks per inch and each data track has approximately 36,000 flux changes per inch. An actuator positions a pair of read/write heads on each platter surface using a voice coil motor to position the heads over a cylinder. A magnetic actuator latch attaches to another magnet on the actuator and locks the heads in a parked position at the innermost diameter of the platter. A spindle motor rotates the platter at approximately 5,400 revolutions per minute. A base plate, with a gasketed surface and a raised lip, hermetically seals with a cover to the base plate such that the platter, the actuator, the actuator latch, and the spindle motor are all contained within. The cover carries a breather filter and recirculating air filter. The raised lip on the base plate prevents direct electrical interference from passing between the base plate and the cover.

    摘要翻译： 一种用于计算机系统的硬盘驱动器，包括具有直径约为1/8至1/8英寸的盘片的磁头盘组件，其能够存储40多兆字节。 在一个实施例中，盘的每个数据表面上的数据轨迹以每英寸大约2,558轨道间隔开，并且每个数据轨道每英寸具有约36,000个通量变化。 致动器使用音圈马达在每个盘片表面上定位一对读/写头，以将磁头定位在气缸上。 磁性致动器闩锁附接到致动器上的另一个磁体，并将磁头锁定在盘片的最内部直径处的停放位置。 主轴电机以每分钟约5400转的速度旋转盘片。 具有垫圈表面和凸起唇缘的基板与盖板密封地密封到基板上，使得盘片，致动器，致动器闩锁和主轴马达都被包含在其中。 盖子带有通气过滤器和循环空气过滤器。 基板上的凸起唇缘可防止直接的电气干扰通过基板和盖板之间。

    High capacity submicro-winchester fixed disk drive
    5.
    发明授权
    High capacity submicro-winchester fixed disk drive 失效
    高容量亚微温芯固定磁盘驱动器

    公开(公告)号：US5255136A

    公开(公告)日：1993-10-19

    申请号：US710171

    申请日：1991-06-04

    申请人： Michael G. Machado ,  Ronald R. Moon ,  Thomas A. Tacklind ,  William G. Moon ,  Bruce R. Peterson ,  Clifford M. Gold ,  Daniel E. Barnard ,  James H. Do

    发明人： Michael G. Machado ,  Ronald R. Moon ,  Thomas A. Tacklind ,  William G. Moon ,  Bruce R. Peterson ,  Clifford M. Gold ,  Daniel E. Barnard ,  James H. Do

    IPC分类号： G11B5/596 ,  G11B20/18 ,  H03M13/15 ,  G06F1/00 ,  G11B5/584

    CPC分类号： G11B5/59655 ,  G11B20/1833 ,  H03M13/151

    摘要： A miniature disk drive achieves storage densities of at least approximately 1700 tracks per inch per storage surface of a storage disk defining a series of radially extensive servo sectors embedded within circumferential zones of data tracks. The sectors are recorded at a constant data transfer rate while each zone has a data transfer rate adapted to disk radius. The drive includes a head and head positioner, a read preamplifier for amplifying analog signals read from, and for amplifying signals to be written to, a storage surface. A circuit board carries drive electronics including a read channel, a servo processing circuit for recovering head location information from the servo sectors, a data block sequencer for sequencing data blocks between a buffer and the storage surface, a buffer memory controller for controlling the buffer, a bus level interface circuit for transferring data blocks between the buffer and a host computer, and a programmed digital controller which functions within a head position servo loop and which also controls the sequencer, buffer controller and bus level interface circuit. As one feature, the servo sectors split data blocks into segments. Segment byte counts in each data block header are used by the sequencer automatically to assemble the segments into data blocks during read and to divide the blocks into segments during write. A single VLSI circuit including the sequencer, servo processing circuit, memory controller and an interface to the microcontroller is disclosed.

    摘要翻译： 微型磁盘驱动器实现存储盘的每个存储表面至少约1700个磁道的存储密度，该存储盘定义嵌入在数据磁道的周边区域内的一系列径向扩展的伺服扇区。 扇区以恒定的数据传输速率进行记录，而每个区域具有适用于磁盘半径的数据传输速率。 驱动器包括头和头定位器，用于放大从要写入的存储表面读取的信号和用于放大要写入的信号的读取前置放大器。 电路板载有包括读通道的驱动电子装置，用于从伺服扇区恢复头部位置信息的伺服处理电路，用于对缓冲器和存储表面之间的数据块进行排序的数据块定序器，用于控制缓冲器的缓冲存储器控制器， 用于在缓冲器和主机之间传送数据块的总线电平接口电路，以及在头位置伺服环路内起作用并且还控制定序器，缓冲器控制器和总线电平接口电路的编程数字控制器。 作为一个特征，伺服扇区将数据块分割成段。 每个数据块头部中的段字节计数自动由片段使用，以便在读取期间将段组合成数据块，并在写入期间将块划分为段。 公开了包括定序器，伺服处理电路，存储器控制器和到微控制器的接口的单个​​VLSI电路。