公开(公告)号：US08284510B1

公开(公告)日：2012-10-09

申请号：US12539474

申请日：2009-08-11

申请人： David Rutherford ,  Man Cheung

发明人： David Rutherford ,  Man Cheung

IPC分类号： G11B5/09 ,  G11B21/02

CPC分类号： G11B5/59666

摘要： Embodiments of the present disclosure provide a method including recording time stamps for a repeating characteristic of a spindle back electromotive force (BEMF) signal and comparing one or more of the recorded time stamps for the repeating characteristic of the spindle BEMF signal with an expected value for the one or more recorded time stamps to detect a timing error associated with writing a servo pattern on a machine readable medium of a self-servo write (SSW) system. Other embodiments may be described and/or claimed.

摘要翻译： 本公开的实施例提供了一种方法，包括记录用于主轴反电动势（BEMF）信号的重复特性的时间戳，并将用于主轴BEMF信号的重复特性的记录时间戳的一个或多个与用于 所述一个或多个记录的时间标记用于检测与自动伺服写入（SSW）系统的机器可读介质上写入伺服模式相关联的定时误差。 可以描述和/或要求保护其他实施例。

公开(公告)号：US20090091855A1

公开(公告)日：2009-04-09

申请号：US12336771

申请日：2008-12-17

申请人： David Rutherford

发明人： David Rutherford

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59661 ,  G11B5/59666

摘要： A system includes a first current generator generating a first current to bias an actuator arm against a spring when a control signal is received and discontinues said first current to release said spring and accelerate said actuator arm when servo signals are generated. A second current generator generates a second current biasing said actuator arm away from said spring when said first current is discontinued.

摘要翻译： 一种系统包括第一电流发生器，当接收到控制信号时，产生第一电流以使致动器臂抵抗弹簧偏置，并且中断所述第一电流以释放所述弹簧并且在产生伺服信号时加速所述致动器臂。 当所述第一电流停止时，第二电流发生器产生偏置所述致动器臂远离所述弹簧的第二电流。

公开(公告)号：US20070206319A1

公开(公告)日：2007-09-06

申请号：US11544253

申请日：2006-10-09

申请人： David Rutherford ,  Luan Ton-That

发明人： David Rutherford ,  Luan Ton-That

IPC分类号： G11B5/596

CPC分类号： G11B5/59633 ,  G11B5/59661 ,  G11B5/59666

摘要： A system comprises a positioning module, a frequency measuring module, a simulation module, and a control module. The positioning module positions an actuator arm adjacent to a track to read spirals that are prewritten using current of a predetermined frequency. The frequency measuring module measures a first frequency of sync marks of the spirals when the actuator arm is positioned adjacent to the track. The simulation module calculates a second frequency of the sync marks when the actuator arm moves at a predetermined actuator velocity. The control module calculates an actuator velocity at which the spirals are prewritten based on the first frequency, the second frequency, and the predetermined actuator velocity.

摘要翻译： 系统包括定位模块，频率测量模块，模拟模块和控制模块。 定位模块将致动器臂定位成与轨道相邻，以读取使用预定频率的电流预写的螺旋。 当致动器臂位于轨道附近时，频率测量模块测量螺旋的同步标记的第一频率。 当致动器臂以预定的致动器速度移动时，模拟模块计算同步标记的第二频率。 控制模块基于第一频率，第二频率和预定的致动器速度来计算螺旋预先写入的致动器速度。

公开(公告)号：US3960911A

公开(公告)日：1976-06-01

申请号：US522591

申请日：1974-11-11

申请人： John Louis Suschitzky ,  David Rutherford

发明人： John Louis Suschitzky ,  David Rutherford

IPC分类号： C07F15/02 ,  C07F17/02

CPC分类号： C07F17/02

摘要： There are described compounds of formula I, ##SPC1##in which R is alkyl, chlorine, bromine, phenyl, or phenyl substituted by one or more halogen or alkyl groups,One of X and Y is group --CO--, --CHOH-- or --CH.sub.2 -- and the other is an exocyclic carbon-carbon bond linking the ferrocenyl or the R group respectively to the -A- group,A contains 5, 6 or 7 carbon atoms and is an ethylenically unsaturated (the double bond being connected to the carbon atom which is connected to X), unsubstituted (except by X and Y) cyclic hydrocarbon group; or is a saturated cyclic hydrocarbon group substituted by X and Y and, when X is a group --CO-, optionally substituted on the carbon atom to which Y is attached by an -OH group, andX and Y are attached to adjacent carbon atoms on the A group. There are also described processes for the production of compounds of formula I and haematinic compositions containing them.

摘要翻译： 描述式I化合物，其中R是烷基，氯，溴，苯基或被一个或多个卤素或烷基取代的苯基，其中一个X和Y是基团-CO-，-CHOH-或-CH 2 - 另一个是分别将二茂铁基或R基团连接到-A-基团的环状碳 - 碳键，A包含5,6或7个碳原子，并且是烯属不饱和的（双键连接到碳原子上 与X）连接，未取代（X和Y除外）环状烃基; 或者是被X和Y取代的饱和环状烃基，当X是-CO-时，任选地在与Y连接的碳原子上被取代，并且X和Y连接到相邻的碳原子上 在A组。 还描述了制备式I化合物和含有它们的血红素组合物的方法。

公开(公告)号：US08681449B1

公开(公告)日：2014-03-25

申请号：US13474584

申请日：2012-05-17

申请人： Jason Adler ,  David Rutherford ,  Man Cheung ,  Perry Neos ,  Luan Ton-That

发明人： Jason Adler ,  David Rutherford ,  Man Cheung ,  Perry Neos ,  Luan Ton-That

IPC分类号： G11B21/02 ,  G11B5/596 ,  G11B5/09

CPC分类号： G11B5/59633 ,  G11B5/59661 ,  G11B5/59666 ,  G11B2020/1281 ,  G11B2220/2516

摘要： Methods, systems, and apparatus, including computer program products, are described for calibrating servos, and in some implementations for calibrating spiral servos for use in self servo write processes. In one aspect, a method is provided that includes measuring a slope of a spiral written to a machine readable medium, and adjusting a parameter in accordance with the measured slope to calibrate spacing of servo tracks, with respect to variation between a target slope and the measured slope for the spiral, for writing the servo tracks to the machine readable medium using the spiral as a reference and the adjusted parameter to generate a same radial spacing between servo tracks from spirals with different slopes.

摘要翻译： 描述了包括计算机程序产品在内的方法，系统和装置，用于校准伺服系统，并且在一些实施例中用于校准用于自伺服写入过程的螺旋伺服。 在一个方面，提供了一种方法，其包括测量写入机器可读介质的螺旋线的斜率，并且根据所测量的斜率调整参数以校准伺服轨道的间距，相对于目标斜率和 用于螺旋的测量斜率，用于使用螺旋作为参考将伺服轨迹写入机器可读介质，并且调整的参数在具有不同斜率的螺旋之间产生在伺服轨道之间相同的径向间隔。

公开(公告)号：US08031428B1

公开(公告)日：2011-10-04

申请号：US12853328

申请日：2010-08-10

申请人： David Rutherford

发明人： David Rutherford

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59605 ,  G11B5/59666

摘要： A self-servo-write system including a timing control module and a position control module. The timing control module is configured to generate (i) timing information of a first set of servo spirals and (ii) timing control signals for writing a second set of final servo wedges based on the timing information. The position control module is configured to generate (i) position information of the first set of servo spirals and (ii) positioning control signals for writing the second set of final servo wedges based on the timing information. Less than half of the servo spirals in the first set of servo spirals are over-written while writing the second set of final servo wedges. A ratio of a first number of final servo wedges in the second set of final servo wedges to a second number of servo spirals in the first set of servo spirals is a non-integer greater than one.

摘要翻译： 一种自伺服写入系统，包括定时控制模块和位置控制模块。 定时控制模块被配置为产生（i）第一组伺服螺旋的定时信息和（ii）基于定时信息写入第二组最终伺服楔的定时控制信号。 位置控制模块被配置为基于定时信息产生（i）第一组伺服螺旋的位置信息和（ii）用于写入第二组最终伺服楔的定位控制信号。 在写入第二组最终伺服楔时，第一组伺服螺旋中伺服螺旋的不到一半被重写。 第二组最终伺服楔形中的第一数量的最终伺服楔与第一组伺服螺旋中的第二数量的伺服螺旋的比率是大于1的非整数。

公开(公告)号：US07869158B1

公开(公告)日：2011-01-11

申请号：US12192931

申请日：2008-08-15

申请人： Man Cheung ,  Perry Neos ,  David Rutherford

发明人： Man Cheung ,  Perry Neos ,  David Rutherford

IPC分类号： G11B5/596 ,  G11B21/02 ,  G11B15/12 ,  G11B5/09

CPC分类号： G11B5/59633 ,  G11B5/59661 ,  G11B5/59666

摘要： A recording medium can include multiple helicoid patterns arranged in multiple helicoid groups, e.g., first and second helicoid groups. Operating a disk drive can include switching between helicoid groups to maintain the alignment of the head with respect to a target track of the rotating recording medium. Enabling a switch can include receiving a waveform produced by a head operated with respect to a rotating recording medium, generating first information from one or more portions of the waveform corresponding to the helicoid patterns of the first helicoid group; generating second information from one or more portions of the waveform corresponding to the helicoid patterns of the second helicoid group; and analyzing the second information with respect to the first information to generate calibration information. The calibration information can compensate for operational differences between using the helicoid patterns of the first helicoid group and the helicoid patterns of the second helicoid group.

摘要翻译： 记录介质可以包括布置在多个螺旋组中的多个螺旋图案，例如第一和第二螺旋组。 操作磁盘驱动器可以包括在螺旋形组之间切换，以保持磁头相对于旋转记录介质的目标磁道的对准。 启用开关可以包括接收由相对于旋转记录介质操作的磁头产生的波形，从对应于第一螺旋组的螺旋图案的波形的一个或多个部分产生第一信息; 从对应于第二螺旋组的螺旋图案的波形的一个或多个部分产生第二信息; 以及分析关于所述第一信息的所述第二信息以生成校准信息。 校准信息可以补偿使用第一螺旋组的螺旋形图案和第二螺旋组的螺旋形图案之间的操作差异。

公开(公告)号：US07471482B2

公开(公告)日：2008-12-30

申请号：US11541977

申请日：2006-10-02

申请人： David Rutherford

发明人： David Rutherford

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59661 ,  G11B5/59666

摘要： A system includes a self-servo-write (SSW) module and a control module. The SSW module generates servo signals and a control signal. The control module generates a first current to bias an actuator arm against a spring when the control signal is received and discontinues the first current to release the spring and accelerate the actuator arm when the SSW module generates the servo signals.

摘要翻译： 系统包括自伺服写（SSW）模块和控制模块。 SSW模块产生伺服信号和控制信号。 当控制信号被接收时，控制模块产生第一电流以使致动器臂抵抗弹簧偏置，并且当SSW模块产生伺服信号时，中断第一电流以释放弹簧并加速致动器臂。

公开(公告)号：US07259931B2

公开(公告)日：2007-08-21

申请号：US11108329

申请日：2005-04-18

申请人： Michael Baldwinson ,  David Rutherford

发明人： Michael Baldwinson ,  David Rutherford

IPC分类号： G11B21/02

CPC分类号： G11B5/6005 ,  G11B5/40 ,  G11B5/6082

摘要： An embodiment of a slider in accordance with the present invention for use in a hard disk drive having a rotatable disk can include a plurality of rails arranged across a surface of the slider such that an air bearing is formed when the slider is positioned over the disk and the disk is rotated such that the slider traverse a servo wedge of the disk. The surface of the slider further includes a trailing pad arranged near a trailing edge of the surface of the slider such that when the slider traverses debris having a height higher than minimum height, the air bearing increases such that the slider is not in communicative proximity with the disk for a time at least as long as a time for the slider to traverse the servo wedge.

摘要翻译： 根据本发明的用于具有可旋转盘的硬盘驱动器的滑块的实施例可以包括跨越滑块的表面布置的多个轨道，使得当滑块位于盘上方时形成空气轴承 并且盘旋转使得滑块横过盘的伺服楔。 滑块的表面还包括设置在滑块的表面的后缘附近的拖曳垫，使得当滑块穿过具有高于最小高度的高度的碎屑时，空气轴承增加，使得滑块不与 磁盘一段时间至少等于滑块穿过伺服楔的时间。

公开(公告)号：US20070171564A1

公开(公告)日：2007-07-26

申请号：US11338359

申请日：2006-01-23

申请人： Richard Ehrlich ,  David Rutherford

发明人： Richard Ehrlich ,  David Rutherford

IPC分类号： G11B5/596 ,  G11B21/02

CPC分类号： G11B5/59688

摘要： A disk drive includes a disk having a first servo burst written with advancing phase as a radial distance on the disk increases, and a second servo burst written with decreasing phase as a radial distance on the disk increases, and a transducing head, and a read channel. The disk drive also includes an element for shifting the phase of the signal produced by the first burst pattern with respect to the signal produced by the second burst pattern by an amount sufficient to substantially cancel distortion in a signal produced by the first servo burst with distortion in a signal produced by the second servo burst when the signal from the first servo burst is added to the signal from the second servo burst.

摘要翻译： 磁盘驱动器包括具有当前进相位写入的第一伺服脉冲串的盘，其中盘上的径向距离增加，并且随着盘上的径向距离而以递减相位写入的第二伺服脉冲串增加，并且传感头和读取 渠道。 磁盘驱动器还包括用于将由第一突发模式产生的信号的相位相对于由第二突发模式产生的信号相位相移的元素，该量足以基本上消除由具有失真的第一伺服脉冲串产生的信号中的失真 当来自第一伺服脉冲串的信号被加到来自第二伺服脉冲串的信号时，由第二伺服脉冲串产生的信号。