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    System and method for protecting head elements of a tape drive
    1.
    发明申请
    System and method for protecting head elements of a tape drive 失效
    用于保护磁带驱动器的磁头元件的系统和方法

    公开(公告)号：US20060209447A1

    公开(公告)日：2006-09-21

    申请号：US11083651

    申请日：2005-03-17

    申请人： John Hamming ,  Robert Heinze ,  Umang Mehta

    发明人： John Hamming ,  Robert Heinze ,  Umang Mehta

    IPC分类号： G11B19/02

    CPC分类号： G11B23/26 ,  G11B5/40 ,  G11B15/62

    摘要： A method and apparatus is provided to protect head elements on a head of a head guide assembly, having a magnetic tape, and a leader coupled to the magnetic tape at a first end, such that the height of the leader is less than the height of the magnetic tape.

    摘要翻译： 提供了一种方法和装置，用于保护具有磁带的磁头引导组件的头部上的磁头元件，以及在第一端处耦合到磁带的磁头，使得磁头的高度小于 磁带。

    MULTI-MODE LOOP ADAPTATION SCHEME FOR HIGH-DENSITY DATA RECORDING CHANNEL
    2.
    发明申请
    MULTI-MODE LOOP ADAPTATION SCHEME FOR HIGH-DENSITY DATA RECORDING CHANNEL 审中-公开
    用于高密度数据记录通道的多模式环路适配方案

    公开(公告)号：US20110032630A1

    公开(公告)日：2011-02-10

    申请号：US12536435

    申请日：2009-08-05

    申请人： Jaewook Lee ,  Sizhen Yang ,  Umang Mehta ,  Jerry Hodges ,  Marc Feller ,  Turguy Goker

    发明人： Jaewook Lee ,  Sizhen Yang ,  Umang Mehta ,  Jerry Hodges ,  Marc Feller ,  Turguy Goker

    IPC分类号： G11B20/20

    CPC分类号： G11B20/10009 ,  G11B20/10027 ,  G11B20/10037 ,  G11B20/10055 ,  G11B20/10074 ,  G11B20/10175 ,  G11B20/1024 ,  G11B20/10296 ,  G11B20/10351 ,  G11B20/10361 ,  G11B20/10425 ,  G11B20/10481 ,  G11B2220/90 ,  G11B2220/93

    摘要： A circuit for a high-density data recording channel includes a first data detector, a second data detector, one or more multiplexers and a sequence identifier. The first data detector generates a first data detector output, and the second data detector generates a second data detector output. The multiplexers change between a first mode and a second mode to alternately receive the first data detector output and the second data detector output. The sequence identifier receives a data sequence including at least one of a first data sequence, such as VFO data, and a second data sequence, such as random data. The second data sequence includes a greater number of signal levels than the first data sequence. The sequence identifier changes the multiplexers between the first mode and the second mode based on whether the data sequence is the first data sequence or the second data sequence. The data sequence includes a plurality of timing stages. The sequence detector can at least partially control a loop bandwidth of the circuit based on the timing stage of the data sequence.

    摘要翻译： 用于高密度数据记录通道的电路包括第一数据检测器，第二数据检测器，一个或多个多路复用器和序列标识符。 第一数据检测器产生第一数据检测器输出，第二数据检测器产生第二数据检测器输出。 复用器在第一模式和第二模式之间改变以交替地接收第一数据检测器输出和第二数据检测器输出。 序列标识符接收包括诸如VFO数据的第一数据序列和诸如随机数据的第二数据序列中的至少一个的数据序列。 第二数据序列包括比第一数据序列更多数量的信号电平。 序列标识符基于数据序列是第一数据序列还是第二数据序列，在第一模式和第二模式之间改变多路复用器。 数据序列包括多个定时阶段。 序列检测器可以至少部分地基于数据序列的定时级来控制电路的环路带宽。

    Multi-rate tracking with a multi-actuator servo control
    3.
    发明授权
    Multi-rate tracking with a multi-actuator servo control 有权
    多速率跟踪与多执行器伺服控制

    公开(公告)号：US07684144B1

    公开(公告)日：2010-03-23

    申请号：US12260937

    申请日：2008-10-29

    申请人： Turguy Goker ,  Ming-Chih Weng ,  Ryan Taylor ,  Umang Mehta

    发明人： Turguy Goker ,  Ming-Chih Weng ,  Ryan Taylor ,  Umang Mehta

    IPC分类号： G11B5/584 ,  G11B5/55

    CPC分类号： G11B5/584

    摘要： In a method of multi-rate tracking with a multi-actuator servo control, a track position error is sampled at an asynchronous sample rate for operating a first actuator. The track position error is also sampled at a synchronous sample rate for operating a second actuator. The sampling from the synchronous sample rate is utilized to reduce a delay associated with the sampling at the asynchronous sample rate.

    摘要翻译： 在使用多执行器伺服控制的多速率跟踪的方法中，轨迹位置误差以用于操作第一致动器的异步采样率进行采样。 跟踪位置误差也以用于操作第二致动器的同步采样率进行采样。 利用来自同步采样率的采样来减少与异步采样速率下的采样相关的延迟。

    REEL MOTOR TORQUE CALIBRATION DURING TAPE MOTION
    4.
    发明申请
    REEL MOTOR TORQUE CALIBRATION DURING TAPE MOTION 审中-公开
    滚筒运动期间的旋转电机扭矩校准

    公开(公告)号：US20090222232A1

    公开(公告)日：2009-09-03

    申请号：US12251246

    申请日：2008-10-14

    申请人： Kempton Redhead ,  Yoshitomi Koike ,  John Sverida ,  Umang Mehta ,  Junichi Hyogo

    发明人： Kempton Redhead ,  Yoshitomi Koike ,  John Sverida ,  Umang Mehta ,  Junichi Hyogo

    IPC分类号： G01L25/00 ,  G01L3/00 ,  G06F19/00

    CPC分类号： G11B15/43

    摘要： Methods, apparatuses and systems directed to calculation of a reel motor torque constant (“KT”). In one implementation, calibration logic energizes supply and take-up reel motors to wind tape from a supply reel to a take-up reel. The calibration logic, during winding, selectively disengages the supply reel motor and measures one or more attributes of the supply reel motor, such as the resulting voltage observed at the winding terminals of the supply reel motor and the angular velocity of the supply reel motor during the period of disengagement. The calibration logic then calculates KT based on the observed attributes.

    摘要翻译： 用于计算卷轴电机转矩常数（“KT”）的方法，装置和系统。 在一个实施方案中，校准逻辑激励供应和卷取电机将卷带从供应卷轴卷绕到卷取卷轴。 校准逻辑在卷绕期间选择性地脱离供带盘马达并测量供带盘马达的一个或多个属性，例如在供带盘马达的绕组端子处观察到的最终电压和供带盘马达的角速度 脱离接触的时期。 然后，校准逻辑基于观察到的属性来计算KT。

    Adaptive disturbance compensation with multi-rate synchronized sampling
    5.
    发明授权
    Adaptive disturbance compensation with multi-rate synchronized sampling 有权
    具有多速率同步采样的自适应干扰补偿

    公开(公告)号：US08773800B2

    公开(公告)日：2014-07-08

    申请号：US12900919

    申请日：2010-10-08

    申请人： Turguy Goker ,  Ming-chih Weng ,  Umang Mehta ,  Ryan Taylor

    发明人： Turguy Goker ,  Ming-chih Weng ,  Umang Mehta ,  Ryan Taylor

    IPC分类号： G11B5/584

    CPC分类号： G11B5/584 ,  G11B20/10046

    摘要： An apparatus and method for providing adaptive disturbance compensation with multi-rate synchronized sampling is disclosed herein. The dynamic disturbance occurring in a media drive during read/write operations is attenuated using the adaptive disturbance compensation scheme. A plurality of compensation filters are used, each of the compensation filters configured to attenuate a disturbance caused by a particular source within the media drive. Each of the compensation filters is computed based on a sampling rate relevant to the respective disturbances.

    摘要翻译： 本文公开了一种用多速率同步采样提供自适应干扰补偿的装置和方法。 在读/写操作期间在介质驱动器中发生的动态干扰使用自适应干扰补偿方案被衰减。 使用多个补偿滤波器，每个补偿滤波器被配置为衰减由介质驱动器内的特定源引起的干扰。 基于与相应干扰相关的采样率来计算每个补偿滤波器。

    Adaptive Correction of Symmetrical and Asymmetrical Saturation in Magnetic Recording Devices
    6.
    发明申请
    Adaptive Correction of Symmetrical and Asymmetrical Saturation in Magnetic Recording Devices 有权
    磁记录装置中对称和不对称饱和度的自适应校正

    公开(公告)号：US20130077187A1

    公开(公告)日：2013-03-28

    申请号：US13240745

    申请日：2011-09-22

    申请人： Marc Feller ,  Jaewook Lee ,  Umang Mehta

    发明人： Marc Feller ,  Jaewook Lee ,  Umang Mehta

    IPC分类号： G11B5/09

    CPC分类号： G11B20/025 ,  G11B5/09 ,  G11B20/10046 ,  G11B20/10203 ,  G11B20/10231 ,  G11B20/10314 ,  G11B20/10324 ,  G11B20/1492 ,  G11B2220/2508

    摘要： In one embodiment, a read channel comprises: a preprocessor for receiving a first signal and producing a second signal from the first signal using current values of a positive coefficient, a zero coefficient, and a negative coefficient; an interpolator for producing a third signal based on the second signal; and a slicer for producing a fourth signal from the third signal by estimating a level for the third signal. The fourth signal is at one of three levels consisting of a positive level, a zero level, and a negative level. For every n first signals received by the preprocessor, the current value of one of the positive coefficient, the zero coefficient, and the negative coefficient is adjusted depending on which of the three levels the fourth signal is at.

    摘要翻译： 在一个实施例中，读通道包括：预处理器，用于接收第一信号，并使用正系数，零系数和负系数的当前值从第一信号产生第二信号; 用于基于所述第二信号产生第三信号的内插器; 以及切片器，用于通过估计第三信号的电平来从第三信号产生第四信号。 第四信号是由正电平，零电平和负电平组成的三个电平之一。 对于由预处理器接收的每n个第一信号，根据第四信号所处的三个电平中的哪一个来调整正系数，零系数和负系数之一的当前值。

    Adaptive correction of symmetrical and asymmetrical saturation in magnetic recording devices
    8.
    发明授权
    Adaptive correction of symmetrical and asymmetrical saturation in magnetic recording devices 有权
    磁记录装置中对称和不对称饱和度的自适应校正

    公开(公告)号：US08760789B2

    公开(公告)日：2014-06-24

    申请号：US13240745

    申请日：2011-09-22

    申请人： Marc Feller ,  Jaewook Lee ,  Umang Mehta

    发明人： Marc Feller ,  Jaewook Lee ,  Umang Mehta

    IPC分类号： G11B5/035

    CPC分类号： G11B20/025 ,  G11B5/09 ,  G11B20/10046 ,  G11B20/10203 ,  G11B20/10231 ,  G11B20/10314 ,  G11B20/10324 ,  G11B20/1492 ,  G11B2220/2508

    摘要： In one embodiment, a read channel comprises: a preprocessor for receiving a first signal and producing a second signal from the first signal using current values of a positive coefficient, a zero coefficient, and a negative coefficient; an interpolator for producing a third signal based on the second signal; and a slicer for producing a fourth signal from the third signal by estimating a level for the third signal. The fourth signal is at one of three levels consisting of a positive level, a zero level, and a negative level. For every n first signals received by the preprocessor, the current value of one of the positive coefficient, the zero coefficient, and the negative coefficient is adjusted depending on which of the three levels the fourth signal is at.

    摘要翻译： 在一个实施例中，读通道包括：预处理器，用于接收第一信号，并使用正系数，零系数和负系数的当前值从第一信号产生第二信号; 用于基于所述第二信号产生第三信号的内插器; 以及切片器，用于通过估计第三信号的电平来从第三信号产生第四信号。 第四信号是由正电平，零电平和负电平组成的三个电平之一。 对于由预处理器接收的每n个第一信号，根据第四信号所处的三个电平中的哪一个来调整正系数，零系数和负系数之一的当前值。

    Waveform interpolator architecture for accurate timing recovery based on up-sampling technique
    9.
    发明授权
    Waveform interpolator architecture for accurate timing recovery based on up-sampling technique 有权
    基于上采样技术的波形插值器架构，用于精确的定时恢复

    公开(公告)号：US08594254B2

    公开(公告)日：2013-11-26

    申请号：US12891647

    申请日：2010-09-27

    申请人： Jaewook Lee ,  Umang Mehta ,  Jerry Hodges

    发明人： Jaewook Lee ,  Umang Mehta ,  Jerry Hodges

    IPC分类号： H04L25/08 ,  H04L27/28

    CPC分类号： H04L7/0029 ,  H03H17/0282 ,  H03H17/0657

    摘要： In one embodiment, an interpolator-based timing recovery system improves accuracy by calculating additional sampled signals of a digital signal and generating an interpolation based on the additional sampled signals and the digital signal, while employing a parallel architecture to maintain system clock frequency and a pipeline architecture to minimize sampled data memory requirement.

    摘要翻译： 在一个实施例中，基于内插器的定时恢复系统通过计算附加的数字信号采样信号并基于附加采样信号和数字信号产生内插来提高精度，同时采用并行架构来维持系统时钟频率和管线 架构以最小化采样数据存储器要求。

    ADAPTIVE DISTURBANCE COMPENSATION WITH MULTI-RATE SYNCHRONIZED SAMPLING
    10.
    发明申请
    ADAPTIVE DISTURBANCE COMPENSATION WITH MULTI-RATE SYNCHRONIZED SAMPLING 有权
    自适应干扰补偿与多速同步采样

    公开(公告)号：US20120087031A1

    公开(公告)日：2012-04-12

    申请号：US12900919

    申请日：2010-10-08

    申请人： Turguy Goker ,  Ming-chih Weng ,  Umang Mehta ,  Ryan Taylor

    发明人： Turguy Goker ,  Ming-chih Weng ,  Umang Mehta ,  Ryan Taylor

    IPC分类号： G11B5/09

    CPC分类号： G11B5/584 ,  G11B20/10046

    摘要： An apparatus and method for providing adaptive disturbance compensation with multi-rate synchronized sampling is disclosed herein. The dynamic disturbance occurring in a media drive during read/write operations is attenuated using the adaptive disturbance compensation scheme. A plurality of compensation filters are used, each of the compensation filters configured to attenuate a disturbance caused by a particular source within the media drive. Each of the compensation filters is computed based on a sampling rate relevant to the respective disturbances.

    摘要翻译： 本文公开了一种用多速率同步采样提供自适应干扰补偿的装置和方法。 在读/写操作期间在介质驱动器中发生的动态干扰使用自适应干扰补偿方案被衰减。 使用多个补偿滤波器，每个补偿滤波器被配置为衰减由介质驱动器内的特定源引起的干扰。 基于与相应干扰相关的采样率来计算每个补偿滤波器。