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。

公开(公告)号：US07916416B1

公开(公告)日：2011-03-29

申请号：US12240212

申请日：2008-09-29

申请人： Guoxiao Guo ,  Jie Yu

发明人： Guoxiao Guo ,  Jie Yu

IPC分类号： G11B5/09

CPC分类号： G11B5/59655 ,  G11B5/59688

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 comprising a varying length across a radius of the disk, and a plurality of slanted line servo bursts recorded at a tilt angle with respect to the preamble. The tilt angle varies across the radius of the disk commensurate with the varying length of the preamble. 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。 伺服数据包括前导码，其包括跨越盘的半径的变化的长度，以及相对于前导码以倾斜角度记录的多个斜线伺服突发。 倾斜角随磁头的半径而变化，与前导码的长度不同。 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）。

公开(公告)号：US07746595B1

公开(公告)日：2010-06-29

申请号：US12240254

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： G11B5/59655 ,  G11B5/59688

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. At least one of the slanted line servo bursts comprises a first polarity along a first segment of the slanted line and a second polarity along a second segment of the slanted line. 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。 斜线伺服脉冲串中的至少一个包括沿着倾斜线的第一段的第一极性和沿着倾斜线的第二段的第二极性。 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）。

公开(公告)号：US07583470B1

公开(公告)日：2009-09-01

申请号：US11847110

申请日：2007-08-29

申请人： Teddy T.C. Chen ,  Guoxiao Guo ,  Kuang-Yang Tu

发明人： Teddy T.C. Chen ,  Guoxiao Guo ,  Kuang-Yang Tu

IPC分类号： G11B5/596

CPC分类号： G11B5/59627

摘要： A disk drive is disclosed including a disk having a plurality of tracks, wherein each track comprises a plurality of servo sectors. The disk drive further comprises a head having a read element offset from a write element by a reader/writer offset. The read element is positioned over a first track and the write element is positioned over a second track. A first servo control signal is generated for servoing the head in response to the servo sectors in the first track, and first wedge repeatable runout (RRO) data is written to the second track along a substantially sinusoidal path corresponding to the reader/writer offset, wherein the first wedge RRO data are for writing data to a third track.

摘要翻译： 公开了一种磁盘驱动器，其包括具有多个磁道的磁盘，其中每个磁道包括多个伺服扇区。 磁盘驱动器还包括具有通过读取器/写入器偏置从读取元件偏移的读取元件的磁头。 读取元件位于第一轨道上，并且写入元件位于第二轨道上。 产生第一伺服控制信号以响应于第一轨道中的伺服扇区来伺服磁头，并且第一楔形可重复跳动（RRO）数据沿对应于读取器/写入器偏移的基本上正弦的路径写入第二磁道， 其中所述第一楔形RRO数据用于将数据写入第三轨道。