公开(公告)号：US07826166B2

公开(公告)日：2010-11-02

申请号：US12215441

申请日：2008-06-27

申请人： Yawshing Tang ,  Peng Luo ,  Na-Young Kim

发明人： Yawshing Tang ,  Peng Luo ,  Na-Young Kim

IPC分类号： G11B21/02 ,  G11B27/36

CPC分类号： G11B5/6029 ,  G11B5/6005 ,  G11B5/6064

摘要： A hard disk drive that includes a disk and a head that is separated from the disk by a flying height. The disk drive also includes a circuit that determines the flying height from an equation that uses a third harmonic of a read signal. The read signal includes a data pattern that is a product of a first data pattern and a second data pattern. The resultant data pattern provides a third harmonic with a relatively high magnitude and improved signal to noise ratio.

摘要翻译： 一个硬盘驱动器，包括一个磁盘和一个与磁盘分开的飞行高度的磁头。 磁盘驱动器还包括从使用读取信号的三次谐波的等式确定飞行高度的电路。 读取信号包括作为第一数据模式和第二数据模式的乘积的数据模式。 所得到的数据模式提供具有相对高的幅度和改善的信噪比的三次谐波。

公开(公告)号：US20090323211A1

公开(公告)日：2009-12-31

申请号：US12215441

申请日：2008-06-27

申请人： Yawshing Tang ,  Peng Luo ,  Na-Young Kim

发明人： Yawshing Tang ,  Peng Luo ,  Na-Young Kim

IPC分类号： G11B27/36

CPC分类号： G11B5/6029 ,  G11B5/6005 ,  G11B5/6064

摘要： A hard disk drive that includes a disk and a head that is separated from the disk by a flying height. The disk drive also includes a circuit that determines the flying height from an equation that uses a third harmonic of a read signal. The read signal includes a data pattern that is a product of a first data pattern and a second data pattern. The resultant data pattern provides a third harmonic with a relatively high magnitude and improved signal to noise ratio.

摘要翻译： 一个硬盘驱动器，包括一个磁盘和一个与磁盘分开的飞行高度的磁头。 磁盘驱动器还包括从使用读取信号的三次谐波的等式确定飞行高度的电路。 读取信号包括作为第一数据模式和第二数据模式的乘积的数据模式。 所得到的数据模式提供具有相对高的幅度和改善的信噪比的三次谐波。

公开(公告)号：US20090135693A1

公开(公告)日：2009-05-28

申请号：US11998396

申请日：2007-11-28

申请人： Na Young Kim ,  Yawshing Tang ,  Carl Xiaodong Che

发明人： Na Young Kim ,  Yawshing Tang ,  Carl Xiaodong Che

IPC分类号： G11B5/02

CPC分类号： G11B5/012 ,  G11B19/041 ,  G11B20/18 ,  G11B2020/183 ,  G11B2220/2516

摘要： A hard disk drive with a disk that contains a target track and an adjacent track. The drive includes a circuit that determines an error in data read from the target track. Data from the adjacent track is stored in memory. The adjacent track is then erased and the target track data is re-read from the target track. Erasing the adjacent track allows the target track data to be read without adjacent track interference. The data from the adjacent track is typically rewritten onto the disk from memory so no data is lost.

摘要翻译： 硬盘驱动器，其中包含目标轨道和相邻轨道的磁盘。 驱动器包括确定从目标轨道读取的数据中的错误的电路。 来自相邻轨道的数据被存储在存储器中。 然后擦除相邻的轨道，并且从目标轨道重新读取目标轨道数据。 擦除相邻轨道允许在没有相邻轨道干涉的情况下读取目标轨道数据。 来自相邻轨道的数据通常从存储器重写到磁盘上，因此没有数据丢失。

公开(公告)号：US20080291564A1

公开(公告)日：2008-11-27

申请号：US11805978

申请日：2007-05-25

申请人： Yawshing Tang ,  Carl Xiaodong Che ,  Na-Young Kim ,  Won C. Yang

发明人： Yawshing Tang ,  Carl Xiaodong Che ,  Na-Young Kim ,  Won C. Yang

IPC分类号： G11B21/02

CPC分类号： G11B21/12 ,  G11B5/5526

摘要： A disk drive that can detect contact between a head and a disk during an off-track operation such as a seek routine, a ramp load or a head take-off. The disk drive includes a circuit that causes the head to move across the disk in a seek routine. A head heater element is driven to move the head into contact with the disk. A read signal provided by the head is filtered through a band pass filter that has a center frequency. The frequency that produces the maximum signal is selected as the center frequency for the band pass filter. The drive can monitor subsequent head contact during an off-track operation by detecting output from the band pass filter.

摘要翻译： 磁盘驱动器，可以在诸如寻道程序，斜坡载荷或磁头起飞之类的偏离轨道操作期间检测磁头和磁盘之间的接触。 磁盘驱动器包括在寻道例程中使磁头移动通过磁盘的电路。 驱动头部加热器元件以移动头部与盘接触。 由头部提供的读取信号通过具有中心频率的带通滤波器进行滤波。 选择产生最大信号的频率作为带通滤波器的中心频率。 驱动器可以通过检测带通滤波器的输出来监视离轨操作期间的后续头部接触。

公开(公告)号：US07742251B2

公开(公告)日：2010-06-22

申请号：US12150810

申请日：2008-04-30

申请人： Yawshing Tang ,  Carl Xiaodong Che ,  Na-Young Kim

发明人： Yawshing Tang ,  Carl Xiaodong Che ,  Na-Young Kim

IPC分类号： G11B5/09

CPC分类号： G11B5/02 ,  G11B5/6005 ,  G11B5/6029 ,  G11B2005/0018

摘要： A hard disk drive that includes a disk that contains at least one signal and a head that is coupled to the disk. The disk drive also contains a circuit that includes a data sampler that generates a plurality of data samples from the signal, a harmonic sensor coupled to the data sampler and a spectral power accumulator coupled to the harmonic sensor. The harmonic sensor accumulates the data samples. The circuit includes a window generator that determines a window length of the data samples accumulated by the harmonic sensor. The spectral power accumulator accumulates the windows of sample data accumulated by the harmonic sensor. The sample data accumulated by the spectral power accumulator can be accessed by a processor that performs a spectral analysis of the data.

摘要翻译： 一个硬盘驱动器，其中包含一个至少包含一个信号的磁盘和一个耦合到磁盘的磁头。 磁盘驱动器还包含电路，该电路包括从信号产生多个数据样本的数据采样器，耦合到数据采样器的谐波传感器和耦合到谐波传感器的频谱功率累加器。 谐波传感器累积数据样本。 该电路包括窗口发生器，其确定由谐波传感器累积的数据样本的窗口长度。 光谱功率累加器累积由谐波传感器累积的采样数据的窗口。 由频谱功率累加器积累的采样数据可以由执行数据的频谱分析的处理器来访问。

公开(公告)号：US07885028B2

公开(公告)日：2011-02-08

申请号：US12082150

申请日：2008-04-08

申请人： Yawshing Tang ,  Carl Xiaodong Che ,  Na-Young Kim

发明人： Yawshing Tang ,  Carl Xiaodong Che ,  Na-Young Kim

IPC分类号： G11B5/09 ,  G11B27/36 ,  G11B5/03

CPC分类号： G11B5/09 ,  G11B20/18 ,  G11B2020/183 ,  G11B2220/2516

摘要： A hard disk drive with a disk that has a plurality of data bits. The drive includes a circuit that reads each data bit n times and selects a value for the bit based on the most frequent occurrence of one of a plurality of values. This process provides a voting technique that enhances the quality of accurately captured data.

摘要翻译： 具有磁盘的具有多个数据位的硬盘驱动器。 驱动器包括读取每个数据位n次的电路，并且基于多个值中的一个值的最频繁出现来选择位的值。 该过程提供了一种提高精确捕获数据质量的投票技术。

公开(公告)号：US07738208B2

公开(公告)日：2010-06-15

申请号：US11998396

申请日：2007-11-28

申请人： Na Young Kim ,  Yawshing Tang ,  Carl Xiaodong Che

发明人： Na Young Kim ,  Yawshing Tang ,  Carl Xiaodong Che

IPC分类号： G11B15/04

CPC分类号： G11B5/012 ,  G11B19/041 ,  G11B20/18 ,  G11B2020/183 ,  G11B2220/2516

摘要： A hard disk drive with a disk that contains a target track and an adjacent track. The drive includes a circuit that determines an error in data read from the target track. Data from the adjacent track is stored in memory. The adjacent track is then erased and the target track data is re-read from the target track. Erasing the adjacent track allows the target track data to be read without adjacent track interference. The data from the adjacent track is typically rewritten onto the disk from memory so no data is lost.

摘要翻译： 硬盘驱动器，其中包含目标轨道和相邻轨道的磁盘。 驱动器包括确定从目标轨道读取的数据中的错误的电路。 来自相邻轨道的数据被存储在存储器中。 然后擦除相邻的轨道，并且从目标轨道重新读取目标轨道数据。 擦除相邻轨道允许在没有相邻轨道干涉的情况下读取目标轨道数据。 来自相邻轨道的数据通常从存储器重写到磁盘上，因此没有数据丢失。

公开(公告)号：US20090251817A1

公开(公告)日：2009-10-08

申请号：US12082150

申请日：2008-04-08

申请人： Yawshing Tang ,  Carl Xiaodong Che ,  Na-Young Kim

发明人： Yawshing Tang ,  Carl Xiaodong Che ,  Na-Young Kim

IPC分类号： G11B5/17

CPC分类号： G11B5/09 ,  G11B20/18 ,  G11B2020/183 ,  G11B2220/2516

摘要： A hard disk drive with a disk that has a plurality of data bits. The drive includes a circuit that reads each data bit n times and selects a value for the bit based on the most frequent occurrence of one of a plurality of values. This process provides a voting technique that enhances the quality of accurately captured data.

摘要翻译： 具有磁盘的具有多个数据位的硬盘驱动器。 驱动器包括读取每个数据位n次的电路，并且基于多个值中的一个值的最频繁出现来选择位的值。 该过程提供了一种提高精确捕获数据质量的投票技术。

公开(公告)号：US20090273856A1

公开(公告)日：2009-11-05

申请号：US12150810

申请日：2008-04-30

申请人： Yawshing Tang ,  Carl Xiaodong Che ,  Na-Young Kim

发明人： Yawshing Tang ,  Carl Xiaodong Che ,  Na-Young Kim

IPC分类号： G11B5/09

CPC分类号： G11B5/02 ,  G11B5/6005 ,  G11B5/6029 ,  G11B2005/0018

摘要： A hard disk drive that includes a disk that contains at least one signal and a head that is coupled to the disk. The disk drive also contains a circuit that includes a data sampler that-generates a plurality of data samples from the signal, a harmonic sensor coupled to the data sampler and a spectral power accumulator coupled to the harmonic sensor. The harmonic sensor accumulates the data samples. The circuit includes a window generator that determines a window length of the data samples accumulated by the harmonic sensor. The spectral power accumulator accumulates the windows of sample data accumulated by the harmonic sensor. The sample data accumulated by the spectral power accumulator can be accessed by a processor that performs a spectral analysis of the data.

摘要翻译： 一个硬盘驱动器，其中包含一个至少包含一个信号的磁盘和一个耦合到磁盘的磁头。 磁盘驱动器还包含一个电路，该电路包括数据采样器，该数据采样器从该信号产生多个数据样本，耦合到数据采样器的谐波传感器和耦合到谐波传感器的频谱功率累加器。 谐波传感器累积数据样本。 该电路包括窗口发生器，其确定由谐波传感器累积的数据样本的窗口长度。 光谱功率累加器累积由谐波传感器累积的采样数据的窗口。 由频谱功率累加器积累的采样数据可以由执行数据的频谱分析的处理器来访问。

公开(公告)号：US20100309578A1

公开(公告)日：2010-12-09

申请号：US12478716

申请日：2009-06-04

申请人： SungChang Lee ,  Yawshing Tang ,  Mike Suk

发明人： SungChang Lee ,  Yawshing Tang ,  Mike Suk

IPC分类号： G11B21/02

CPC分类号： G11B5/6029 ,  G11B5/40 ,  G11B5/455 ,  G11B5/6005 ,  G11B5/6064

摘要： This application discloses a hard disk drive and operates it based upon using a first and third harmonic amplitude generated from reading a repeated pattern of bits written to a track on a disk surface. Both amplitudes are used to create a first data set and the third harmonic amplitude is used as a single tone to create a second data set. A conversion factor between these two is determine, which may be used to convert the first data set under other conditions into a temperature insensitive table of the electrical stimulus of a vertical micro-actuator and the flying height change of the slider. The hard disk drive may be calibrated during manufacture and/or in the field.

摘要翻译： 本申请公开了一种硬盘驱动器，并且基于使用从读取写入盘表面上的轨道的重复比特模式产生的第一和第三谐波幅度来操作它。 两个幅度用于创建第一数据集，并且三次谐波幅度用作单音以创建第二数据集。 确定这两者之间的转换因子，其可以用于将其他条件下的第一数据集转换成垂直微致动器的电刺激的温度不敏感表和滑块的飞行高度变化。 硬盘驱动器可能在制造和/或现场进行校准。