公开(公告)号：US20150187384A1

公开(公告)日：2015-07-02

申请号：US14180329

申请日：2014-02-13

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  Eui Seok Hwang ,  George Mathew

IPC: G11B20/10

CPC classification number: G11B20/10046 ,  G11B20/10037 ,  G11B20/10388

Abstract: A method for enhancing read performance in a multi-reader two-dimensional magnetic recording system comprising first and second readers includes: receiving first and second analog read signals from the first and second readers, respectively; sampling the first and second analog read signals to generate first and second sampled signals, respectively, each of the first and second sampled signals comprising an integer component, indicative of a value of a corresponding one of the first and second analog read signals, respectively, at an integer multiple of a corresponding sampling period associated therewith, and/or a fractional component, indicative of a value of the corresponding one of the first and second analog read signals, respectively, at an arbitrary point in time between integer multiples of the corresponding sampling period; and combining the integer and/or fractional components of the respective first and second sampled signals to thereby generate a reader offset estimation signal.

Abstract translation: 一种用于在包括第一和第二读取器的多读取器二维磁记录系统中提高读取性能的方法，包括：分别从第一和第二读取器接收第一和第二模拟读取信号; 对第一和​​第二模拟读取信号进行采样以分别产生第一和第二采样信号，第一和第二采样信号中的每一个分别包括表示第一和第二模拟读取信号中对应的一个的值的整数分量， 在与其相关联的相应采样周期的整数倍和/或分数分量中，分别表示在对应的第一和第二模拟读取信号的整数倍之间的任意时间点的相应一个的值 抽样期 以及组合相应的第一和第二采样信号的整数和/或分数分量，从而产生读取器偏移估计信号。

公开(公告)号：US08929011B1

公开(公告)日：2015-01-06

申请号：US14055886

申请日：2013-10-17

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  Eui Seok Hwang ,  George Mathew

IPC: G11B20/10 ,  G11B27/32 ,  G11B20/14

CPC classification number: G11B20/10222 ,  G11B20/14 ,  G11B27/3027 ,  G11B27/32

Abstract: A data processing system includes an analog to digital converter operable to sample an analog signal obtained from a magnetic storage medium to yield digital samples, and a sync mark detector operable to search for a particular one of a number of sync marks in the digital samples. Each of the data tracks on the magnetic storage medium is associated with one of the sync marks. The sync mark on each of the data tracks has a different pattern than the sync marks on neighboring tracks.

Abstract translation: 数据处理系统包括模数转换器，其可操作以对从磁存储介质获得的模拟信号进行采样以产生数字样本;以及同步标记检测器，其可操作以搜索数字样本中的多个同步标记中的特定一个。 磁存储介质上的每个数据轨道与同步标记中的一个相关联。 每个数据轨道上的同步标记具有与相邻轨道上的同步标记不同的图案。

公开(公告)号：US20140334280A1

公开(公告)日：2014-11-13

申请号：US14156273

申请日：2014-01-15

Applicant: LSI Corporation

Inventor： Xiufeng Song

IPC: G11B5/60

CPC classification number: G11B5/6076 ,  G11B5/607

Abstract: The present inventions are related to systems and methods for determining contact between two elements, and more particularly to systems and methods for determining contact between a head assembly and a storage medium.

Abstract translation: 本发明涉及用于确定两个元件之间的接触的系统和方法，更具体地涉及用于确定头部组件和存储介质之间的接触的系统和方法。

公开(公告)号：US08873194B1

公开(公告)日：2014-10-28

申请号：US14242633

申请日：2014-04-01

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  Richard Rauschmayer

IPC: G11B21/02

CPC classification number: G11B5/6076 ,  G11B5/6029

Abstract: Touchdown detection in magnetic storage devices is provided to detect contact between a storage medium and a magnetic head having an embedded contact sensor. A sample stream is obtained, which includes samples of a sensor signal output from the embedded contact sensor. The sample stream is segmented into multiple segments. A modulation depth is determined for each of the segments. A combined modulation depth is determined by combining the modulation depths of the segments using a weighting function. The combined modulation depth is compared with a threshold. A determination is made as to whether the magnetic head makes contact with the storage medium based on a result of the comparing.

Abstract translation: 提供磁存储装置中的触地屏检测用于检测存储介质和具有嵌入式触点传感器的磁头之间的接触。 获得样品流，其包括从嵌入式接触传感器输出的传感器信号的样品。 样本流被分段成多个段。 确定每个段的调制深度。 通过使用加权函数组合段的调制深度来确定组合调制深度。 将组合的调制深度与阈值进行比较。 基于比较的结果，确定磁头是否与存储介质接触。

公开(公告)号：US08854756B1

公开(公告)日：2014-10-07

申请号：US13894723

申请日：2013-05-15

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  Jun Xiao ,  Jianzhong Huang ,  Lu Lu

IPC: G11B5/09 ,  G11B5/60

CPC classification number: G11B5/6076 ,  G11B5/607

Abstract: The present inventions are related to systems and methods for determining contact between two elements, and more particularly to systems and methods for determining contact between a head assembly and a storage medium.

Abstract translation: 本发明涉及用于确定两个元件之间的接触的系统和方法，更具体地涉及用于确定头部组件和存储介质之间的接触的系统和方法。

公开(公告)号：US09240199B2

公开(公告)日：2016-01-19

申请号：US14217886

申请日：2014-03-18

Applicant: LSI Corporation

Inventor： Xiufeng Song

IPC: G11B5/09 ,  G11B20/18 ,  G11B20/10 ,  G11B27/36

CPC classification number: G11B5/09 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10305 ,  G11B20/10481 ,  G11B20/1876 ,  G11B27/36

Abstract: Systems, methods, devices and circuits for data amplification, and more particularly systems and methods for characterizing distortion introduced during data amplification. In some cases, an amplifier modeling circuit is discussed that receives a preamplifier status input from a preamplifier circuit; applies a vector fitting algorithm to the preamplifier status to yield a pole value; determines that the pole value is greater than unity; and replaces the pole value with an inverse of the pole value when the pole value is greater than unity.

Abstract translation: 用于数据放大的系统，方法，设备和电路，更具体地说，用于表征在数据放大期间引入的失真的系统和方法。 在一些情况下，讨论了从前置放大器电路接收前置放大器状态输入的放大器建模电路; 对前置放大器状态应用向量拟合算法以产生极值; 确定极值大于单位; 并且当极值大于1时，用极值的反相代替极值。

公开(公告)号：US20150170706A1

公开(公告)日：2015-06-18

申请号：US14148407

申请日：2014-01-06

Applicant: LSI Corporation

Inventor： Lu Lu ,  Haitao Xia ,  Lu Pan ,  Xiufeng Song

IPC: G11B20/10

CPC classification number: G11B20/10046 ,  G11B20/10212

Abstract: Systems, methods, devices, circuits for data processing, and more particularly to data processing including adjacent track interference detection and/or characterization.

Abstract translation: 用于数据处理的系统，方法，设备，电路，更具体地涉及包括相邻轨道干扰检测和/或表征的数据处理。

公开(公告)号：US08937781B1

公开(公告)日：2015-01-20

申请号：US14109705

申请日：2013-12-17

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  Jianzhong Huang ,  Fan Zhang ,  Jun Xiao

IPC: G11B5/60

CPC classification number: G11B5/6076

Abstract: A contact detection system includes a comparator operable to compare a signal derived from a contact sensor with a threshold and to indicate contact when the signal is greater than the threshold, a parameter estimation circuit operable to estimate parameters of a probability density function based on the signal derived from the contact sensor, and a threshold calculator operable to calculate the threshold based at least in part on the parameters of the probability density function.

Abstract translation: 接触检测系统包括比较器，可操作以将从接触传感器导出的信号与阈值进行比较，并且当信号大于阈值时指示接触;参数估计电路，用于基于信号估计概率密度函数的参数 以及阈值计算器，其可操作以至少部分地基于所述概率密度函数的参数来计算所述阈值。

公开(公告)号：US09293164B2

公开(公告)日：2016-03-22

申请号：US13894680

申请日：2013-05-15

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  Richard Rauschmayer

IPC: G11B5/127 ,  G11B5/60

CPC classification number: G11B5/6076 ,  G11B5/607

Abstract: The present inventions are related to systems and methods for determining contact between two elements, and more particularly to systems and methods for determining contact between a head assembly and a storage medium.

Abstract translation: 本发明涉及用于确定两个元件之间的接触的系统和方法，更具体地涉及用于确定头部组件和存储介质之间的接触的系统和方法。

公开(公告)号：US09245579B2

公开(公告)日：2016-01-26

申请号：US14180329

申请日：2014-02-13

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  Eui Seok Hwang ,  George Mathew

IPC: G11B20/10

CPC classification number: G11B20/10046 ,  G11B20/10037 ,  G11B20/10388

Abstract: A method for enhancing read performance in a multi-reader two-dimensional magnetic recording system comprising first and second readers includes: receiving first and second analog read signals from the first and second readers, respectively; sampling the first and second analog read signals to generate first and second sampled signals, respectively, each of the first and second sampled signals comprising an integer component, indicative of a value of a corresponding one of the first and second analog read signals, respectively, at an integer multiple of a corresponding sampling period associated therewith, and/or a fractional component, indicative of a value of the corresponding one of the first and second analog read signals, respectively, at an arbitrary point in time between integer multiples of the corresponding sampling period; and combining the integer and/or fractional components of the respective first and second sampled signals to thereby generate a reader offset estimation signal.

Abstract translation: 一种用于在包括第一和第二读取器的多读取器二维磁记录系统中提高读取性能的方法，包括：分别从第一和第二读取器接收第一和第二模拟读取信号; 对第一和​​第二模拟读取信号进行采样以分别产生第一和第二采样信号，第一和第二采样信号中的每一个分别包括表示第一和第二模拟读取信号中对应的一个的值的整数分量， 在与其相关联的相应采样周期的整数倍和/或分数分量中，分别表示在对应的第一和第二模拟读取信号的整数倍之间的任意时间点的相应一个的值 抽样期 以及组合相应的第一和第二采样信号的整数和/或分数分量，从而产生读取器偏移估计信号。