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21. 发明授权

US08619385B1 Disk drive biasing sync pattern of an extended sync mark 有权
标题翻译：扩展同步标记的磁盘驱动器偏置同步模式
公开(公告)号：US08619385B1
公开(公告)日：2013-12-31
申请号：US13015844
申请日：2011-01-28
申请人： Guoxiao Guo , Jie Yu
发明人： Guoxiao Guo , Jie Yu
IPC分类号： G11B5/00
CPC分类号： G11B5/59655 , G11B5/59688 , G11B20/10 , G11B2020/1476
摘要： A disk drive is disclosed comprising a disk including a plurality of sectors each comprising a sector sync mark pattern and sector data preceding and following the sector sync mark pattern, and a head actuated over the disk for generating a read signal. A data sequence is detected from the read signal, and the data sequence is correlated with an extended sync mark comprising a target sync mark pattern and target data. The correlation of the target sync mark pattern with the data sequence is biased relative to the correlation of the target data with the data sequence.
摘要翻译：公开了一种磁盘驱动器，包括包括多个扇区的盘，每个扇区包括扇区同步标记图案和扇区同步标记图案之前和之后的扇区数据，以及在盘上启动以产生读取信号的磁头。从读取信号检测数据序列，并且数据序列与包括目标同步标记模式和目标数据的扩展同步标记相关。目标同步标记模式与数据序列的相关性相对于目标数据与数据序列的相关性有偏差。

22. 发明授权

US07746594B1 Disk drive comprising slanted line servo burst sets offset radially 有权
标题翻译：磁盘驱动器包括倾斜线伺服脉冲串组件径向偏移
公开(公告)号：US07746594B1
公开(公告)日：2010-06-29
申请号：US12240374
申请日：2008-09-29
申请人： Guoxiao Guo , Jie Yu
发明人： Guoxiao Guo , Jie Yu
IPC分类号： G11B5/596
CPC分类号： G11B5/59688 , G11B5/59655
摘要： A disk drive is disclosed comprising a disk having servo data defining a plurality of servo tracks. The servo data comprises a preamble, and a plurality of slanted line servo bursts recorded at a tilt angle with respect to the preamble. The slanted line servo bursts comprises a first plurality of slanted line servo bursts and a second plurality of slanted line servo bursts, wherein the second plurality of slanted line servo bursts are offset radially from the first plurality of slanted line servo bursts. A position error signal (PES) is generated in response to a phase difference when reading the preamble and the slanted line servo bursts.
摘要翻译：公开了一种磁盘驱动器，其包括具有定义多个伺服磁道的伺服数据的磁盘。伺服数据包括相对于前导码以倾斜角度记录的前导码和多个斜线伺服脉冲串。斜线伺服脉冲串包括第一多个倾斜线伺服突发和第二多个倾斜线伺服突发，其中第二多个倾斜线伺服突发从第一多个倾斜线伺服脉冲串径向偏移。响应于读取前导码和斜线伺服脉冲串时的相位差产生位置误差信号（PES）。

23. 发明授权

US07663835B1 System and method for identifying track squeeze errors (TSEs) of a disk of a disk drive 失效
标题翻译：用于识别磁盘驱动器的磁盘的磁道挤压误差（TSE）的系统和方法
公开(公告)号：US07663835B1
公开(公告)日：2010-02-16
申请号：US11770554
申请日：2007-06-28
申请人： Jie Yu , Guoxiao Guo
发明人： Jie Yu , Guoxiao Guo
IPC分类号： G11B5/596
CPC分类号： G11B5/59627 , G11B19/045
摘要： A system and method for efficiently identifying track squeeze errors (TSEs) of a disk of a disk drive during a testing process for the disk drive is disclosed. The method includes reading servo bursts from a track of the disk, utilizing a modeled scan variable, and determining a gain comprising a ratio of a first matrix A and a second matrix B. TSEs associated with the SWEs of the servo bursts are determined for the track. The TSEs are determined as a product of the gain and a measured scan variable wherein the measured scan variable is calculated as being the difference between a measured scan value and an estimated nominal scan value.
摘要翻译：公开了一种用于在磁盘驱动器的测试过程期间有效地识别磁盘驱动器的磁盘的磁道挤压错误（TSE）的系统和方法。该方法包括从盘的轨道读取伺服脉冲串，利用建模的扫描变量，以及确定包括第一矩阵A和第二矩阵B的比率的增益。与伺服脉冲串的SWE相关联的TSE被确定为跟踪。 TSE被确定为增益和测量的扫描变量的乘积，其中测量的扫描变量被计算为测量的扫描值和估计的标称扫描值之间的差。

24. 发明授权

US06624553B2 Head suspension assembly for magnetic disk drives 失效
公开(公告)号：US06624553B2
公开(公告)日：2003-09-23
申请号：US09826173
申请日：2001-04-04
申请人： Kodikkunnathukulangara Sivadasan , Guoxiao Guo
发明人： Kodikkunnathukulangara Sivadasan , Guoxiao Guo
IPC分类号： H01L4108
CPC分类号： G11B21/21 , G11B5/5552
摘要： A microactuator (30) is provided for positioning a read/write head relative to a mounting region of a head suspension assembly of a magnetic disk drive. The microactuator (30) comprises a substantially C-shaped member (32) having a first end (34) and a second end (38) defining an air gap (42) therebetween. In one embodiment the member (32) is a piezoelectric bimorph expander; in another embodiment the member is a ferromagnetic core. Under an applied electric or magnetic field as appropriate, the size of the air gap (42) may be altered and, because the member (32) is resilient, the original air gap may be restored on removing the applied field. The microactuator may be mounted on the load beam of the head suspension assembly, or between the load beam and head slider supporting the read/write head.

25. 发明授权

US06522050B2 Head suspension assembly with piezoelectric beam micron actuator 失效
标题翻译：头悬挂组件与压电梁微型执行机构
公开(公告)号：US06522050B2
公开(公告)日：2003-02-18
申请号：US09898596
申请日：2001-07-03
申请人： Kodikkunnathukulangara Sivadasan , Guoxiao Guo
发明人： Kodikkunnathukulangara Sivadasan , Guoxiao Guo
IPC分类号： H01L4108
CPC分类号： G11B5/5552
摘要： A micro actuator driven load beam mechanism for use in a head suspension assembly is disclosed. The mechanism includes a load beam including a proximal end portion and a distal end portion, a hinge portion connecting the proximal and distal end portions of the load beam for permitting relative movement therebetween, and a piezoelectric beam connecting the proximal and distal end portions, the piezoelectric beam being selectively energizable to effect relative movement between the proximal and distal end portions. The load beam includes a pocket for holding at least one end of the piezoelectric beam. The piezoelectric beam and the pocket may be inclined relative to a hinge plane to control the load beam twist and minimize the altitude variations of the beam tip.
摘要翻译：公开了一种用于头悬挂组件中的微致动器驱动的负载梁机构。该机构包括：负载梁，其包括近端部分和远端部分;铰接部分，连接负载梁的近端部分和远端部分，用于允许其相对移动;以及压电梁，其连接近端部分和远端部分，压电梁可以选择性地激励，以实现近端部分和远端部分之间的相对运动。负载梁包括用于保持压电梁的至少一端的凹部。压电梁和凹槽可以相对于铰链平面倾斜以控制负载梁扭曲并使梁尖的高度变化最小化。

26. 发明授权

US09052701B1 Disk drive measuring a resonance mode by injecting sinusoids into a servo control system 有权
标题翻译：磁盘驱动器通过将正弦曲线注入伺服控制系统来测量谐振模式
公开(公告)号：US09052701B1
公开(公告)日：2015-06-09
申请号：US13585679
申请日：2012-08-14
申请人： Qingwei Jia , Shuyu Cao , Guoxiao Guo , Jie Yu
发明人： Qingwei Jia , Shuyu Cao , Guoxiao Guo , Jie Yu
IPC分类号： G05B5/01
CPC分类号： G05B5/01 , G11B5/59611 , G11B5/59622 , H02P25/034
摘要： A disk drive is disclosed comprising a disk comprising a plurality of servo tracks defined by servo sectors recorded around the circumference of the disk at a servo sampling frequency, and a servo control system operable to actuate a head over the disk by generating a control signal applied to an actuator. A first sinusoid is injected into the servo control system and a first DC component (dc1) is measured in the control signal. A second sinusoid is injected into the servo control system and a second DC component (dc2) is measured in the control signal, wherein the second sinusoid comprises a phase offset from the first sinusoid. A resonance mode of the servo control system is measured based on dc1 and dc2.
摘要翻译：公开了一种磁盘驱动器，其包括盘，该盘包括以伺服采样频率记录在盘周围的伺服扇区所限定的多个伺服轨迹;以及伺服控制系统，可操作以通过产生施加的控制信号来驱动磁盘上的磁头到致动器。在伺服控制系统中注入第一个正弦曲线，并在控制信号中测量第一个直流分量（dc1）。将第二正弦波注入到伺服控制系统中，并且在控制信号中测量第二直流分量（dc2），其中第二正弦波包括与第一正弦波相位偏移。基于dc1和dc2测量伺服控制系统的谐振模式。

27. 发明授权

US08917469B1 Disk drive correcting an error in a detected gray code 有权
标题翻译：磁盘驱动器校正检测到的灰色代码中的错误
公开(公告)号：US08917469B1
公开(公告)日：2014-12-23
申请号：US13614894
申请日：2012-09-13
申请人： Guoxiao Guo , Donald Brunnett , Jianguo Zhou , Wai Ee Wong
发明人： Guoxiao Guo , Donald Brunnett , Jianguo Zhou , Wai Ee Wong
IPC分类号： G11B5/09
CPC分类号： G11B5/59655 , G11B5/59627 , G11B5/59644 , G11B20/10268 , G11B20/1403 , G11B20/18 , G11B2020/10916
摘要： A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of tracks defined by a plurality of servo sectors. An estimated track ID is generated and a plurality of proximate track IDs is generated having values proximate the estimated track ID. A set of Gray codes is generated each corresponding to the estimated track ID and the proximate track IDs, wherein each Gray code in the set of Gray codes comprises N bits, and M bits out of a high order of the N bits comprise the same value. A recorded Gray code is detected in a first servo sector to generate a detected Gray code, and an error in the detected Gray code is corrected by inverting at least one bit in the detected Gray code comprising a value that is different from the value of the corresponding bit in the M bits.
摘要翻译：公开了一种磁盘驱动器，包括在包括由多个伺服扇区限定的多个磁道的盘上驱动的磁头。产生估计的轨道ID，并且生成具有接近估计轨道ID的值的多个邻近轨道ID。产生一组格雷码，每组格对应于估计的轨道ID和邻近轨道ID，其中格雷码组中的每个格雷码包括N比特，并且N比特的高阶中的M比特包含相同的值。在第一伺服扇区中检测到记录的格雷码，以产生检测到的格雷码，并且通过将检测到的格雷码中的至少一个比特反相来校正检测格雷码中的误差，该比特包括不同于 M位中的相应位。

28. 发明授权

US08780477B1 Disk drive adjusting servo timing to compensate for transient when crossing a servo zone boundary 有权
标题翻译：磁盘驱动器调整伺服定时，以补偿穿过伺服区域边界时的瞬态
公开(公告)号：US08780477B1
公开(公告)日：2014-07-15
申请号：US13529904
申请日：2012-06-21
申请人： Wei Guo , Michael Chang , Guoxiao Guo , Jie Yu
发明人： Wei Guo , Michael Chang , Guoxiao Guo , Jie Yu
IPC分类号： G11B5/09
CPC分类号： G11B5/59616 , G11B5/5547 , G11B20/10222
摘要： A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of servo sectors defining a plurality of servo tracks, wherein the servo tracks form a plurality of servo zones, and a servo data rate of servo sectors in a first servo zone is different than a servo data rate of servo sectors in a second servo zone. A disk locked clock is synchronized to the data rate of the servo sectors in the first servo zone, wherein the disk locked clock for generating a timing window relative to the servo sectors. When the head crosses from the first servo zone to the second servo zone, at least one of the disk locked clock and the timing window is adjusted to compensate for a timing transient.
摘要翻译：公开了一种磁盘驱动器，其包括在包括多个伺服扇区的磁盘上启动的磁头，所述多个伺服扇区限定多个伺服磁道，其中所述伺服磁道形成多个伺服区，并且第一伺服区中的伺服扇区的伺服数据速率为与第二伺服区域中的伺服扇区的伺服数据速率不同。磁盘锁定时钟与第一伺服区域中的伺服扇区的数据速率同步，其中盘锁定时钟用于相对于伺服扇区产生定时窗口。当头从第一伺服区跨越到第二伺服区时，调整盘锁定时钟和定时窗中的至少一个以补偿定时瞬变。

29. 发明授权

US08717704B1 Disk drive defining non-circular data tracks relative to a rotation axis of the disk 有权
标题翻译：磁盘驱动器定义相对于磁盘的旋转轴的非圆形数据轨道
公开(公告)号：US08717704B1
公开(公告)日：2014-05-06
申请号：US13406797
申请日：2012-02-28
申请人： Jie Yu , Guoxiao Guo , Jianguo Zhou , Sanghoon Chu , Young-Hoon Kim , Abhishek Dhanda
发明人： Jie Yu , Guoxiao Guo , Jianguo Zhou , Sanghoon Chu , Young-Hoon Kim , Abhishek Dhanda
IPC分类号： G11B5/58
CPC分类号： G11B5/58 , G11B5/59644
摘要： A disk drive is disclosed comprising a disk having a plurality of servo tracks defined by servo sectors, and a head actuated over the disk. The disk drive further comprises control circuitry comprising a servo control system operable to position the head over the disk. A disturbance is induced in the servo control system, and while positioning the head over the disk, a data track is accessed. The disturbance induced in the servo control system causes the data track to be non-circular relative to a rotation axis of the disk such that the non-circular data track crosses multiple of the servo tracks over a revolution of the disk.
摘要翻译：公开了一种磁盘驱动器，其包括具有由伺服扇区限定的多个伺服磁道的盘，以及在该盘上启动的磁头。磁盘驱动器还包括控制电路，其包括可操作以将磁头定位在磁盘上的伺服控制系统。在伺服控制系统中引起干扰，并且当将磁头定位在磁盘上时，可以访问数据磁道。在伺服控制系统中引起的干扰使得数据轨道相对于盘的旋转轴线是非圆形的，使得非圆形数据轨道在盘的一圈上跨越多个伺服轨道。

30. 发明授权

US08213106B1 Zoned servo system 有权
标题翻译：分区伺服系统
公开(公告)号：US08213106B1
公开(公告)日：2012-07-03
申请号：US12401494
申请日：2009-03-10
申请人： Guoxiao Guo , Jie Yu
发明人： Guoxiao Guo , Jie Yu
IPC分类号： G11B5/596 , G11B5/02
CPC分类号： G11B5/59688 , G11B5/59616 , G11B5/59655
摘要： A disk drive includes a plurality of servo zones of different servo frequencies and a read channel. The disk drive also includes a frequency detector operable to determine a servo frequency associated with a servo sector. The read channel includes a voltage-controlled oscillator operable to provide a reference clock; frequency multiplier/divider circuitry operable to multiply or divide the reference clock from the voltage-controlled oscillator by a first factor to generate a first servo timing recovery clock for the first servo zone, the first factor selected based at least in part on the servo frequency determined by the frequency detector; and a servo demodulator operable to demodulate the at least a portion of a servo sector using the first servo timing recovery clock.
摘要翻译：磁盘驱动器包括具有不同伺服频率的多个伺服区和读通道。磁盘驱动器还包括可用于确定与伺服扇区相关联的伺服频率的频率检测器。读通道包括可操作以提供参考时钟的压控振荡器; 频率乘法器/分频器电路，其可操作以将来自压控振荡器的参考时钟乘以或除以第一因子，以产生用于第一伺服区的第一伺服定时恢复时钟，第一因素至少部分地基于伺服频率由频率检测器确定; 以及伺服解调器，其可操作以使用第一伺服定时恢复时钟来解调伺服扇区的至少一部分。

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