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41. 发明授权

US08625216B2 Servo zone detector 有权
标题翻译：伺服区域检测器
公开(公告)号：US08625216B2
公开(公告)日：2014-01-07
申请号：US13490913
申请日：2012-06-07
申请人： Xun Zhang , Dahua Qin , Haitao Xia
发明人： Xun Zhang , Dahua Qin , Haitao Xia
IPC分类号： G11B5/09 , G11B21/02 , G11B5/596
CPC分类号： G11B5/59655 , G11B5/59688
摘要： The present inventions are related to systems and methods for transferring information to and from a storage medium, and more particularly to systems and methods for positioning a sensor in relation to a storage medium. For example, an apparatus for determining a sensor position is disclosed that includes discrete Fourier transform calculators operable to process input data to yield a magnitude response of the input data at each of a number of candidate frequencies, a comparator operable to compare the magnitude responses to yield a winning candidate frequency, a servo controller operable to process at least one servo field in the input data to identify a position of a sensor based on the at least one servo field, and a servo frequency synthesizer operable to establish a frequency of operation in the servo controller based at least in part on the winning candidate frequency.
摘要翻译：本发明涉及用于将信息传送到存储介质和从存储介质传送信息的系统和方法，更具体地涉及用于相对于存储介质定位传感器的系统和方法。例如，公开了一种用于确定传感器位置的装置，其包括离散付里叶变换计算器，其可操作以处理输入数据以在多个候选频率的每一个处产生输入数据的幅度响应，比较器，可操作以将幅度响应与产生获胜候选频率，伺服控制器，其可操作以处理所述输入数据中的至少一个伺服字段，以基于所述至少一个伺服字段识别传感器的位置;以及伺服频率合成器，其可操作以建立操作频率所述伺服控制器至少部分地基于所述获胜候选频率。

42. 发明申请

US20130329313A1 Servo Zone Detector 有权
标题翻译：伺服区检测器
公开(公告)号：US20130329313A1
公开(公告)日：2013-12-12
申请号：US13490913
申请日：2012-06-07
申请人： Xun Zhang , Dahua Qin , Haitao Xia
发明人： Xun Zhang , Dahua Qin , Haitao Xia
IPC分类号： G11B27/24 , G11B5/09
CPC分类号： G11B5/59655 , G11B5/59688
摘要： The present inventions are related to systems and methods for transferring information to and from a storage medium, and more particularly to systems and methods for positioning a sensor in relation to a storage medium. For example, an apparatus for determining a sensor position is disclosed that includes discrete Fourier transform calculators operable to process input data to yield a magnitude response of the input data at each of a number of candidate frequencies, a comparator operable to compare the magnitude responses to yield a winning candidate frequency, a servo controller operable to process at least one servo field in the input data to identify a position of a sensor based on the at least one servo field, and a servo frequency synthesizer operable to establish a frequency of operation in the servo controller based at least in part on the winning candidate frequency.
摘要翻译：本发明涉及用于将信息传送到存储介质和从存储介质传送信息的系统和方法，更具体地涉及用于相对于存储介质定位传感器的系统和方法。例如，公开了一种用于确定传感器位置的装置，其包括离散付里叶变换计算器，其可操作以处理输入数据以在多个候选频率的每一个处产生输入数据的幅度响应，比较器，可操作以将幅度响应与产生获胜候选频率，伺服控制器，其可操作以处理所述输入数据中的至少一个伺服字段，以基于所述至少一个伺服字段识别传感器的位置;以及伺服频率合成器，其可操作以建立操作频率所述伺服控制器至少部分地基于所述获胜候选频率。

43. 发明申请

US20120303327A1 Systems and Methods for Pattern Detection 有权
标题翻译：模式检测系统与方法
公开(公告)号：US20120303327A1
公开(公告)日：2012-11-29
申请号：US13113210
申请日：2011-05-23
申请人： Xun Zhang , Mark D. Thornley , Viswanath Annampedu , Peter J. Windler
发明人： Xun Zhang , Mark D. Thornley , Viswanath Annampedu , Peter J. Windler
IPC分类号： G06F15/00
CPC分类号： H04L7/0334 , G11B20/10222 , H04L7/046 , H04L2007/047
摘要： Various embodiments of the present invention provide systems and methods related to pattern detection. As an example, a system for sample selection is disclosed that includes a difference calculation circuit, a comparator circuit, and an output selector circuit. The difference calculation circuit is operable to calculate a first difference between a first value corresponding to a first digital sample and a second value corresponding to a second digital sample, and to calculate a second difference between a third value corresponding to a third digital sample and a fourth value corresponding to a fourth digital sample. The comparator circuit is operable to compare the first difference with the second difference to yield a comparison output. The output selector circuit is operable to select one of the second value and the fourth value as an output based at least upon the comparison output.
摘要翻译：本发明的各种实施例提供了与模式检测有关的系统和方法。作为示例，公开了一种用于样本选择的系统，其包括差分计算电路，比较器电路和输出选择器电路。差分计算电路可操作以计算对应于第一数字样本的第一值与对应于第二数字样本的第二值之间的第一差，并计算与第三数字样本相对应的第三值和第四值对应于第四数字样本。比较器电路可操作以将第一差异与第二差值进行比较以产生比较输出。输出选择器电路可操作以至少基于比较输出来选择第二值和第四值之一作为输出。

44. 外观设计

USD669428S1 Charging station 有权
公开(公告)号：USD669428S1
公开(公告)日：2012-10-23
申请号：US29416356
申请日：2012-03-21
申请人： Meng Li , Lin Tian , Xun Zhang
设计人： Meng Li , Lin Tian , Xun Zhang

45. 发明申请

US20120033323A1 Systems and Methods for Servo Data Based Harmonics Calculation 有权
标题翻译：基于伺服数据的谐波计算系统与方法
公开(公告)号：US20120033323A1
公开(公告)日：2012-02-09
申请号：US12851455
申请日：2010-08-05
申请人： George Mathew , Xun Zhang , Hongwei Song
发明人： George Mathew , Xun Zhang , Hongwei Song
IPC分类号： G11B21/02 , G11B5/127 , G01R23/00
CPC分类号： G11B5/6029
摘要： Various embodiments of the present invention provide systems and methods for servo data based harmonics calculation. For example, a circuit for determining harmonics is disclosed that includes an analog to digital conversion circuit that provides a series of digital samples corresponding to a pattern within a servo data region of a storage medium, and a harmonic calculation circuit. The harmonic calculation circuit is operable to calculate a first harmonic value for the series of digital samples, calculate a second harmonic value for the series of digital samples, and calculate a ratio of the first harmonic value to the second harmonic value.
摘要翻译：本发明的各种实施例提供了用于基于伺服数据的谐波计算的系统和方法。例如，公开了一种用于确定谐波的电路，其包括提供与存储介质的伺服数据区域内的模式相对应的一系列数字样本的模数转换电路和谐波计算电路。谐波计算电路可操作地计算一系列数字采样的一次谐波值，计算一系列数字采样的二次谐波值，并计算一次谐波值与二次谐波值的比值。

46. 发明授权

US08049982B1 Methods and apparatus for measuring servo address mark distance in a read channel using selective fine phase estimate 有权
标题翻译：使用选择性精细相位估计在读通道中测量伺服地址标记距离的方法和装置
公开(公告)号：US08049982B1
公开(公告)日：2011-11-01
申请号：US12847676
申请日：2010-07-30
申请人： Jeffrey P. Grundvig , Viswanath Annampedu , Xun Zhang
发明人： Jeffrey P. Grundvig , Viswanath Annampedu , Xun Zhang
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10037 , G11B20/10074 , G11B20/1024 , G11B20/10277 , G11B20/14 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , G11B2220/2516
摘要： Methods and apparatus are provided for measuring servo address mark distance in a read channel using selective fine phase estimates. A distance between servo address marks (SAMs) in servo data of a magnetic recording media can be computed by obtaining a count of a number of time intervals between SAM patterns; obtaining a plurality of fractional phase estimates; selecting at least one of the plurality of fractional phase estimates as a selected fractional phase estimate based on a selection criteria; and combining the count and the selected fractional phase estimate to compute the distance. The fractional phase estimates can include a first fractional phase estimate having a lower resolution and higher accuracy in the presence of frequency errors relative to a second fractional phase estimate and wherein the second fractional phase estimate has more resolution and lower accuracy in the presence of the frequency errors relative to the first fractional phase estimate. The selection criteria can comprise a frequency error threshold.
摘要翻译：提供了使用选择性精细相位估计来测量读取通道中的伺服地址标记距离的方法和装置。可以通过获得SAM图案之间的时间间隔数的计数来计算磁记录介质的伺服数据中的伺服地址标记（SAM）之间的距离; 获得多个分数阶段估计; 基于选择标准来选择所述多个分数阶段估计中的至少一个作为选择的分数阶段估计; 并结合计数和所选择的分数相位估计来计算距离。分数阶段估计可以包括在存在相对于第二分数阶段估计的频率误差的情况下具有较低分辨率和较高精度的第一分数相位估计，并且其中第二分数相位估计在频率存在的情况下具有更高的分辨率和更低的精度相对于第一分数阶段估计的误差。选择标准可以包括频率误差阈值。

47. 外观设计

USD643020S1 Stacked modular speaker assembly 有权
标题翻译：堆叠模块化扬声器组件
公开(公告)号：USD643020S1
公开(公告)日：2011-08-09
申请号：US29362342
申请日：2010-05-24
申请人： Xun Zhang
设计人： Xun Zhang

48. 发明申请

US20100142078A1 Systems and Methods for Memory Efficient Repeatable Run Out Processing 有权
标题翻译：用于存储器高效重复运行处理的系统和方法
公开(公告)号：US20100142078A1
公开(公告)日：2010-06-10
申请号：US12328024
申请日：2008-12-04
申请人： Viswanath Annampedu , Terence Karanink , Xun Zhang , Jeffrey P. Grundvig
发明人： Viswanath Annampedu , Terence Karanink , Xun Zhang , Jeffrey P. Grundvig
IPC分类号： G11B5/09
CPC分类号： G11B5/59627
摘要： Various embodiments of the present invention provide systems and methods for low overhead disk wobble compensation. As an example, a method for performing synchronous wobble compensation processing is disclosed. The method includes providing a medium that includes a servo data region and a user data region. The servo data region includes a clock recovery pattern and a location pattern. A detectable pattern is written to the user data region a known number of bit periods from the location pattern. The detectable pattern is read back, and a fractional processing delay is calculated. Based at least on the fractional processing delay and a known number of bit periods from the location pattern to the end of the servo data region, a wobble compensation pattern is written an integral number of bit periods from the location pattern.
摘要翻译：本发明的各种实施例提供了用于低架空磁盘摆动补偿的系统和方法。作为示例，公开了一种用于执行同步摆动补偿处理的方法。该方法包括提供包括伺服数据区和用户数据区的介质。伺服数据区域包括时钟恢复模式和位置模式。将可检测图案从位置图案写入用户数据区域已知数量的位周期。读取可检测图案，并计算分数处理延迟。至少基于分数处理延迟和从位置模式到伺服数据区域的结束的已知数量的位周期，摆动补偿模式从位置模式写入整数个位周期。

49. 发明申请

US20090131262A1 METHOD OF FORMING A MULTIFILAMENT AC TOLERANT CONDUCTOR WITH STRIATED STABILIZER, ARTICLES RELATED TO THE SAME, AND DEVICES INCORPORATING THE SAME 有权
标题翻译：形成具有结构稳定剂的多元耐压导体的方法，与其相关的制品以及与其同时进行的装置
公开(公告)号：US20090131262A1
公开(公告)日：2009-05-21
申请号：US11487204
申请日：2006-07-14
申请人： Xun Zhang , Venkat Selvamanickam
发明人： Xun Zhang , Venkat Selvamanickam
IPC分类号： H01L39/02 , H01L39/24
CPC分类号： H01L39/143 , H01L39/248 , Y10S428/933 , Y10T29/49014 , Y10T428/265
摘要： A multifilament high temperature superconductor with thick, striated stabilizer is disclosed, including a substrate, a buffer layer, a multifilament superconductor layer, and at least one thick stabilizer layer. Also disclosed are components incorporating superconducting tapes and methods for manufacturing same.
摘要翻译：公开了一种具有厚的条纹稳定剂的复丝高温超导体，包括基底，缓冲层，复丝超导体层和至少一个厚的稳定剂层。还公开了包含超导带的部件及其制造方法。

50. 发明授权

US07424077B2 Jitter sensitive maximum-a-posteriori sequence detection 有权
标题翻译：抖动敏感最大后验序列检测
公开(公告)号：US07424077B2
公开(公告)日：2008-09-09
申请号：US11105008
申请日：2005-04-13
申请人： Xueshi Yang , Erozan Mehmet Kurtas , Rohit Negi , Xun Zhang
发明人： Xueshi Yang , Erozan Mehmet Kurtas , Rohit Negi , Xun Zhang
IPC分类号： H04L7/02
CPC分类号： H04L25/03178 , G11B20/10046 , G11B20/10212
摘要： A channel detector has an anchor points inserter, a desired signal calculator, a distance calculator and a data detector. The anchor points inserter is adapted to choose values of expected transition locations for transition shifts within a received signal and to insert anchor points corresponding to the chosen values within a bit detection interval. The desired signal calculator is coupled to the anchor points inserter and is adapted to estimate desired signals corresponding to transition location information from the anchor points inserter. The distance calculator is coupled to the desired signal calculator and is adapted to generate a distance calculator output based on distances between the received signal and each of the desired signals. The data detector is coupled to the distance calculator and is adapted to identify a bit sequence corresponding to a desired signal having a minimum distance from the received signal. The data detector is adapted to generate an output based on the distance calculator output.
摘要翻译：信道检测器具有锚点插入器，期望的信号计算器，距离计算器和数据检测器。锚点插入器适于选择接收信号内的转变位移的预期转换位置的值，并且在位检测间隔内插入与所选择的值对应的锚定点。期望的信号计算器耦合到锚点插入器，并且适于估计对应于来自锚点插入器的转换位置信息的期望信号。距离计算器耦合到期望的信号计算器，并且适于基于接收信号和每个期望信号之间的距离产生距离计算器输出。数据检测器耦合到距离计算器，并且适于识别与从接收信号具有最小距离的期望信号相对应的比特序列。数据检测器适于基于距离计算器输出生成输出。

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