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51. 发明授权

US07760459B1 Framing selection and waveform polarity determination for an encoded repeating pattern 有权
标题翻译：编码重复图案的成帧选择和波形极性确定
公开(公告)号：US07760459B1
公开(公告)日：2010-07-20
申请号：US11953794
申请日：2007-12-10
申请人： Ke Han , Pantas Sutardja , Rui Cao
发明人： Ke Han , Pantas Sutardja , Rui Cao
IPC分类号： G11B21/02 , G11B5/596 , G11B20/06
CPC分类号： G11B5/59644 , G11B20/14
摘要： Systems and techniques to select a framing and determine a waveform polarity of an encoded repeating pattern include, in at least one aspect, operations including: decoding an encoded repeating pattern using multiple framings of signal samples of a signal from a machine-readable medium; correlating the signal samples that indicate pattern transitions, for the multiple framings, with valid pattern transitions as defined by the encoding; accumulating the transition pattern correlations for the multiple framings; selecting one of the multiple framings as a correct framing for decoding based on the accumulated correlations; and determining a waveform polarity for the signal based on the repeating pattern and the selected correct framing.
摘要翻译：选择成帧并确定编码的重复图案的波形极性的系统和技术在至少一个方面包括以下操作：包括：使用来自机器可读介质的信号的信号样本的多个成帧来对编码的重复图案进行解码; 对于多个帧，指示模式转换的信号样本与由编码定义的有效模式转换相关; 累积多个帧的过渡模式相关性; 基于累积的相关性，将多个帧中的一个选择为正确的解码帧; 以及基于所述重复图案和所选择的正确框架确定所述信号的波形极性。

52. 发明授权

US07580216B1 Disk servo pattern writing 有权
标题翻译：磁盘伺服模式写入
公开(公告)号：US07580216B1
公开(公告)日：2009-08-25
申请号：US11953811
申请日：2007-12-10
申请人： Ke Han , Pantas Sutardja , Rui Cao
发明人： Ke Han , Pantas Sutardja , Rui Cao
IPC分类号： G11B21/02 , G11B5/596 , G11B20/06
CPC分类号： G11B5/59644 , G11B20/14
摘要： Systems and techniques to write servo patterns on machine-readable media. In general, in one implementation, the technique includes: obtaining timing information from a spiral servo reference track on a machine-readable medium to determine head position, and generating a servo track with servo information based on the determined head position. Obtaining the timing information can involve determining a peak position of a diamond-shaped waveform and identifying occurrences of a timing-reference symbol in the spiral servo reference track. Moreover, identifying occurrences of the timing-reference symbol can involve decoding an encoded repeating pattern using multiple framings, correlating signal samples that indicate pattern transitions with valid pattern transitions as defined by the encoding, accumulating the transition pattern correlations for the multiple framings, selecting one of the multiple framings as a correct framing, and determining a waveform polarity for the signal.
摘要翻译：在机器可读介质上写入伺服模式的系统和技术。通常，在一个实现中，该技术包括：从机器可读介质上的螺旋伺服参考轨道获取定时信息以确定磁头位置，以及基于确定的磁头位置产生具有伺服信息的伺服磁道。获取定时信息可以包括确定菱形波形的峰值位置并且识别螺旋伺服参考轨道中的定时参考符号的出现。此外，识别定时参考符号的出现可以包括使用多个成帧对编码的重复模式进行解码，将指示模式转换的信号样本与由编码定义的有效模式转换相关联，累积多个帧的转换模式相关性，选择一个的多个帧作为正确的帧，并且确定该信号的波形极性。

53. 发明申请

US20080232997A1 Method of producing cobalt-platinum magnetic alloys with improved magnetic properties 有权
标题翻译：具有改善磁性能的钴 - 铂磁性合金的制备方法
公开(公告)号：US20080232997A1
公开(公告)日：2008-09-25
申请号：US12077392
申请日：2008-03-19
申请人： Baozhi Cui , Ke Han
发明人： Baozhi Cui , Ke Han
IPC分类号： C22C19/07 , H01F1/01 , C22C5/04
CPC分类号： C22C5/04 , C22C19/07 , H01F1/047
摘要： A method for processing CoPt alloys with improved magnetic properties. The method includes sealing a sample of a CoPt alloy in an evacuated quartz tube, and heating the alloy to a temperature of approximately 1000 degrees C. to homogenize the alloy for approximately 3 hours. The sample is then cooled at a controlled cooling rate of 120-150 degrees C. per minute to 600 degrees C. The sample is then held at 600 degrees C. for 10 hours to promote isothermal ordering. Finally, the sample is quenched in mineral oil.
摘要翻译：一种具有改善磁性能的CoPt合金的处理方法。该方法包括将真空石英管中的CoPt合金样品密封，并将该合金加热至约1000℃的温度，使合金均匀化约3小时。然后将样品以120-150摄氏度/分钟的受控冷却速度冷却至600摄氏度。然后将样品在600摄氏度下保持10小时以促进等温排序。最后，将样品在矿物油中淬火。

54. 发明授权

US07403351B1 Sequence-permutation control information detection and signal polarity determination 有权
标题翻译：序列置换控制信息检测和信号极性确定
公开(公告)号：US07403351B1
公开(公告)日：2008-07-22
申请号：US10944506
申请日：2004-09-17
申请人： Ke Han , Zining Wu
发明人： Ke Han , Zining Wu
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B5/59633 , G11B2020/1281 , G11B2220/2516
摘要： Systems and techniques relating to interpreting signals on a noisy channel with polarity uncertainty. A signal processor, such as a read channel transceiver device usable in a magnetic recording system, includes a detector operable to find a data pattern that indicates control information in a read signal and to determine a signal polarity of the read signal by determining Euclidean distances between a sampled sequence from the read signal and multiple possible sequences corresponding to preamble-shifted and polarity-reversed versions of the data pattern. The read signal is obtained from a partial response channel, such as in a storage device, and the data pattern can be a servo mark selected based on Euclidean distances between the servo mark and preamble-shifted and polarity-reversed versions of the servo mark generated according to a target channel and an encoding scheme specified for the storage medium.
摘要翻译：与极性不确定性的噪声信道上解码信号相关的系统和技术。诸如可用于磁记录系统中的读通道收发器装置的信号处理器包括检测器，其可操作以找到指示读信号中的控制信息的数据模式，并通过确定读信号的信号极性，通过确定读信号的欧几里得距离来自读取信号的采样序列和对应于数据模式的前导码移位和极性反转版本的多个可能序列。读取信号从诸如存储装置中的部分响应信道获得，并且数据模式可以是基于伺服标记与产生的伺服标记的前导码移位和极性反转版本之间的欧氏距离而选择的伺服标记根据针对存储介质指定的目标通道和编码方案。

55. 发明授权

US07203013B1 Method and apparatus for asymmetry correction in magnetic recording channels 有权
标题翻译：磁记录通道中不对称校正的方法和装置
公开(公告)号：US07203013B1
公开(公告)日：2007-04-10
申请号：US11424106
申请日：2006-06-14
申请人： Ke Han , Zining Wu
发明人： Ke Han , Zining Wu
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10046 , G11B2005/0016 , G11B2220/2516
摘要： Asymmetry correction for an MR read head in a magnetic recording channel employs an exponential function to correct MR read head asymmetry. The asymmetry correction function has the form fASC (y)=y−q(eay+e−ay−2), wherein a is a parameter that can be adjusted for optimal channel performance, and q is an asymmetry correction coefficient.
摘要翻译：磁记录通道中的MR读取头的不对称校正采用指数函数来校正MR读取头不对称。不对称校正函数具有形式为（ASC）（y）= yq（e ^{ay）+ e - - - （2）），其中a为参数可以调整以获得最佳的通道性能，q是非对称校正系数。}

56. 发明授权

US06310739B1 Method and system for detection recording media defacts 失效
标题翻译：用于检测记录媒体的方法和系统
公开(公告)号：US06310739B1
公开(公告)日：2001-10-30
申请号：US09283351
申请日：1999-03-31
申请人： Peter A. McEwen , Bahjat Zafer , Kelly K. Fitzpatrick , Ke Han , Steve Aronson , Kevin Fisher
发明人： Peter A. McEwen , Bahjat Zafer , Kelly K. Fitzpatrick , Ke Han , Steve Aronson , Kevin Fisher
IPC分类号： G11B502
CPC分类号： G11B27/36 , G01R33/1207 , G11B5/00 , G11B5/012 , G11B33/10 , G11B2220/20
摘要： A discrete-time filtering method for identifying defects in a magnetic medium, comprising the steps of: reading data signals from at least a portion of the medium; sampling the data signals to generate discrete time sample data; processing the sample data in a discrete time filter to detect deviation of the signal corresponding to media defects; and comparing the deviation of the signal to one or more threshold values to identify corresponding defect types on the recording medium. The filter can be configured to have an impulse response substantially matched to deviation of the signal corresponding to media defects.
摘要翻译：一种用于识别磁介质中的缺陷的离散时间滤波方法，包括以下步骤：从介质的至少一部分读取数据信号; 对数据信号进行采样以产生离散时间采样数据; 在离散时间滤波器中处理样本数据以检测对应于介质缺陷的信号的偏差; 以及将信号的偏差与一个或多个阈值进行比较，以识别记录介质上的相应缺陷类型。滤波器可以被配置为具有与对应于介质缺陷的信号的偏差基本匹配的脉冲响应。

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