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11. 发明授权

US07768728B2 Detecting head/disk contact using timing jitter 有权
标题翻译：使用定时抖动检测磁头/磁盘接触
公开(公告)号：US07768728B2
公开(公告)日：2010-08-03
申请号：US12001231
申请日：2007-12-10
申请人： Yawshing Tang , Carl Xiaodong Che
发明人： Yawshing Tang , Carl Xiaodong Che
IPC分类号： G11B27/36
CPC分类号： G11B27/3027 , G11B20/10222 , G11B20/18 , G11B2220/2516
摘要： A disk drive that includes a head and a disk. The disk drive also includes a circuit that can detect head/disk contact from a jitter determined from a read signal provided by the head. The jitter may correspond to the time interval between two detected sync marks. Alternatively, the jitter may correspond to a change in frequency of a read clock generated from the read signal. These approaches allow for detection of head movement in a down track direction. Down track is a direction that is essentially parallel with the longitudinal axis of the head.
摘要翻译：包含磁头和磁盘的磁盘驱动器。磁盘驱动器还包括可以从由头提供的读取信号确定的抖动来检测磁头/磁盘接触的电路。抖动可以对应于两个检测到的同步标记之间的时间间隔。或者，抖动可以对应于从读取信号产生的读取时钟的频率变化。这些方法允许在下行轨道方向上检测头部运动。下轨道是基本上与头部的纵向轴线平行的方向。

12. 发明申请

US20100177418A1 WRITER AND READER CENTER ALIGNMENT WITH SERVO AND DATA TRACK IN DISCRETE TRACK RECORDING 审中-公开
标题翻译： WRITER和READER中心对齐与伺服和数据跟踪在分离轨迹记录
公开(公告)号：US20100177418A1
公开(公告)日：2010-07-15
申请号：US12353918
申请日：2009-01-14
申请人： Yawshing Tang , Carl Xiaodong Che
发明人： Yawshing Tang , Carl Xiaodong Che
IPC分类号： G11B27/36 , G11B5/596
CPC分类号： G11B5/5547 , B82Y10/00 , G11B5/743 , G11B20/22 , G11B27/36 , G11B2005/0002 , G11B2220/2516
摘要： A hard disk drive with a patterned disk that has a discrete track. The disk drive includes a controller that controls a head and a voice coil motor to optimize a writing of information onto the discrete track. Writing optimization can occur by initially writing a track of information and recording the write position. The written track is then located by reading the information with a read element of a drive head and analyzing a quality of the read signal, such as signal amplitude or error rate. The read position is then recorded. The information is erased and the head is moved. The process of writing, finding the written track location, storing the write and read positions and again moving the head is repeated. The write and read positions that provide the best quality signal is saved and subsequently used to write and read data on the discrete track.
摘要翻译：具有带有离散轨道的图案化磁盘的硬盘驱动器。磁盘驱动器包括控制头和音圈电机的控制器，以优化将信息写入离散轨道。写入优化可以通过初始写入信息轨迹并记录写入位置来进行。然后通过用驱动头的读取元件读取信息并分析诸如信号幅度或错误率的读取信号的质量来定位写入的轨迹。然后记录读取位置。信息被清除，头部移动。重复写入过程，找到写入的轨迹位置，存储写入和读取位置以及再次移动头部。提供最佳质量信号的写入和读取位置被保存并随后用于在离散轨道上写入和读取数据。

13. 发明授权

US07612959B2 Method for correcting added and lost bits in a hard disk drive using error correction codes 失效
标题翻译：使用纠错码校正硬盘驱动器中添加和丢失位的方法
公开(公告)号：US07612959B2
公开(公告)日：2009-11-03
申请号：US11600669
申请日：2006-11-15
申请人： Yawshing Tang , Carl Xiaodong Che
发明人： Yawshing Tang , Carl Xiaodong Che
IPC分类号： G11B20/14
CPC分类号： G11B20/1803
摘要： A hard disk drive with an encoder that writes data onto a disk in accordance with a plurality of first codes. Each code contains a plurality of digital bits. The first codes are selected so that if a bit is added or dropped during a write or read process the resulting bitstream can only be one of the selected first codes. This allows the bitstream to be accurately decoded to detect and correct for the added/dropped bit.
摘要翻译：具有编码器的硬盘驱动器，其根据多个第一代码将数据写入盘。每个代码包含多个数字位。选择第一代码，使得如果在写入或读取处理期间添加或丢弃位，则所得到的比特流只能是所选择的第一代码之一。这允许比特流被精确地解码以检测和校正添加/丢弃的比特。

14. 发明申请

US20080316639A1 Large data block written on overlapping tracks in a hard disk drive 有权
标题翻译：写在硬盘驱动器中的重叠轨道上的大数据块
公开(公告)号：US20080316639A1
公开(公告)日：2008-12-25
申请号：US11820707
申请日：2007-06-19
申请人： Yawshing Tang , Carl Xiaodong Che
发明人： Yawshing Tang , Carl Xiaodong Che
IPC分类号： G11B5/596
CPC分类号： G11B5/596 , G11B5/012 , G11B20/1262 , G11B2020/10537 , G11B2020/1292 , G11B2220/2516
摘要： A hard disk drive with a disk that includes a first group of tracks and a second group of tracks. The second group of tracks are used to write large blocks of data. For example, data in the second group may be video or audio. The second group of tracks has a higher track density than the first group of tracks. The large data block is written sequentially in the second group of tracks so that there is only one adjacent track write within the group. Using only one adjacent track write allows the tracks within the second group to be overlapped to increase track density.
摘要翻译：具有包括第一组轨道和第二组轨道的盘的硬盘驱动器。第二组轨道用于写入大块数据。例如，第二组中的数据可以是视频或音频。第二组轨道具有比第一组轨道更高的轨道密度。大数据块被顺序地写入第二组轨道，使得在该组内只有一个相邻轨迹写入。仅使用一个相邻轨道写入允许第二组内的轨道重叠以增加轨道密度。

15. 发明申请

US20100128399A1 HARMONIC MEASUREMENT FOR HEAD-DISK SPACING CONTROL USING USER DATA 失效
标题翻译：使用用户数据进行头盘间距控制的谐波测量
公开(公告)号：US20100128399A1
公开(公告)日：2010-05-27
申请号：US12323367
申请日：2008-11-25
申请人： Carl Xiaodong Che , Yawshing Tang , Haejung Lee
发明人： Carl Xiaodong Che , Yawshing Tang , Haejung Lee
IPC分类号： G11B21/24
CPC分类号： G11B5/6029 , G11B5/5534 , G11B5/6064 , G11B5/607
摘要： A hard disk drive that determines a flying height from a ratio of a first harmonic transfer function and a third harmonic transfer function. The transfer functions can be determined from a response to an impulse function. The impulse function (also known as an impulse response) can be a playback waveform de-convolved by channel data sequence. Any change in the ratio of the first and third harmonic transfer functions corresponds to a change in the flying height. The disk drive may utilize the transfer function ratios in a feedback routine to control the flying height.
摘要翻译：硬盘驱动器，从一次谐波传递函数和三次谐波传递函数的比率确定飞行高度。传递函数可以根据对脉冲函数的响应来确定。脉冲函数（也称为脉冲响应）可以是通过通道数据序列去卷积的重放波形。第一和第三谐波传递函数的比率的任何变化对应于飞行高度的变化。磁盘驱动器可以利用反馈程序中的传递函数比来控制飞行高度。

16. 发明申请

US20100128380A1 SES ASSISTED WRITE FLY HEIGHT MONITOR AND CONTROL 审中-公开
标题翻译： SES辅助写入飞行高度监控和控制
公开(公告)号：US20100128380A1
公开(公告)日：2010-05-27
申请号：US12323047
申请日：2008-11-25
申请人： Yawshing Tang , Carl Xiaodong Che
发明人： Yawshing Tang , Carl Xiaodong Che
IPC分类号： G11B21/02
CPC分类号： G11B5/6029 , G11B5/6005 , G11B5/6064 , G11B19/046
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 a signal read during a write operation of the drive. The circuit performs a calibration routine to determine a temperature dependent variable of the signal to offset any temperature effects on the signal used to determine the flying height. The calibration routine can be performed using a spacing error signal (“SES”) generated by the drive.
摘要翻译：包含磁盘的硬盘驱动器和与磁盘分开的飞行高度的磁头。磁盘驱动器还包括一个电路，其确定在驱动器的写入操作期间读取的信号的飞行高度。电路执行校准程序，以确定信号的温度变化，以抵消任何温度对用于确定飞行高度的信号的影响。可以使用由驱动器产生的间隔误差信号（“SES”）来执行校准程序。

17. 发明申请

US20090147390A1 Detecting head/disk contact using timing jitter 有权
标题翻译：使用定时抖动检测磁头/磁盘接触
公开(公告)号：US20090147390A1
公开(公告)日：2009-06-11
申请号：US12001231
申请日：2007-12-10
申请人： Yawshing Tang , Carl Xiaodong Che
发明人： Yawshing Tang , Carl Xiaodong Che
IPC分类号： G11B27/36
CPC分类号： G11B27/3027 , G11B20/10222 , G11B20/18 , G11B2220/2516
摘要： A disk drive that includes a head and a disk. The disk drive also includes a circuit that can detect head/disk contact from a jitter determined from a read signal provided by the head. The jitter may correspond to the time interval between two detected sync marks. Alternatively, the jitter may correspond to a change in frequency of a read clock generated from the read signal. These approaches allow for detection of head movement in a down track direction. Down track is a direction that is essentially parallel with the longitudinal axis of the head.
摘要翻译：包含磁头和磁盘的磁盘驱动器。磁盘驱动器还包括可以从由头提供的读取信号确定的抖动来检测磁头/磁盘接触的电路。抖动可以对应于两个检测到的同步标记之间的时间间隔。或者，抖动可以对应于从读取信号产生的读取时钟的频率变化。这些方法允许在下行轨道方向上检测头部运动。下轨道是基本上与头部的纵向轴线平行的方向。

18. 发明申请

US20080112071A1 Method for correcting added and lost bits in a hard disk drive using error correction codes 失效
标题翻译：使用纠错码校正硬盘驱动器中添加和丢失位的方法
公开(公告)号：US20080112071A1
公开(公告)日：2008-05-15
申请号：US11600669
申请日：2006-11-15
申请人： Yawshing Tang , Carl Xiaodong Che
发明人： Yawshing Tang , Carl Xiaodong Che
IPC分类号： G11B5/09
CPC分类号： G11B20/1803
摘要： A hard disk drive with an encoder that writes data onto a disk in accordance with a plurality of first codes. Each code contains a plurality of digital bits. The first codes are selected so that if a bit is added or dropped during a write or read process the resulting bitstream can only be one of the selected first codes. This allows the bitstream to be accurately decoded to detect and correct for the added/dropped bit.
摘要翻译：具有编码器的硬盘驱动器，其根据多个第一代码将数据写入盘。每个代码包含多个数字位。选择第一代码，使得如果在写入或读取处理期间添加或丢弃位，则所得到的比特流只能是所选择的第一代码之一。这允许比特流被精确地解码以检测和校正添加/丢弃的比特。

19. 发明授权

US07826166B2 Data pattern for fly height measurement 失效
标题翻译：飞高测量数据模式
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。

20. 发明申请

US20090323211A1 New data pattern for fly height measurement 失效
标题翻译：飞行高度测量的新数据模式
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。

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