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89 条记录 (耗时 0.051 秒)

    Apparatus, system, and method for mitigating signal asymmetry
    3.
    发明授权
    Apparatus, system, and method for mitigating signal asymmetry 失效
    用于减轻信号不对称的装置，系统和方法

    公开(公告)号：US07106533B2

    公开(公告)日：2006-09-12

    申请号：US10966531

    申请日：2004-10-15

    申请人： Evangelos S. Eleftheriou ,  Ernest Stewart Gale ,  Robert Allen Hutchins ,  Glen Alan Jaquette ,  Sedat Oelcer

    发明人： Evangelos S. Eleftheriou ,  Ernest Stewart Gale ,  Robert Allen Hutchins ,  Glen Alan Jaquette ,  Sedat Oelcer

    IPC分类号： G11B20/10

    CPC分类号： H03M1/1042 ,  G11B20/10 ,  G11B2220/90

    摘要： An apparatus, system, and method are disclosed for mitigating signal asymmetry. An analog to digital converter samples an analog signal from a read head and converts the sample to a digital input signal. The digital input signal addresses a look-up module, and the look-up module outputs a modified digital signal. The modified digital signal value is a specified function of the digital input signal value, wherein the specified function is configured to mitigate the asymmetry of the digital input signal. The modified digital signal value may be periodically recalculated to adjust for read head wear.

    摘要翻译： 公开了一种减轻信号不对称性的装置，系统和方法。 模数转换器从读取头采样模拟信号，并将样本转换为数字输入信号。 数字输入信号寻址查找模块，查找模块输出修改后的数字信号。 修改的数字信号值是数字输入信号值的指定函数，其中指定的功能被配置为减轻数字输入信号的不对称性。 可以周期性地重新计算修改的数字信号值以调整读头磨损。

    Fixing tap coefficients in a programmable finite-impulse-response equalizer
    4.
    发明授权
    Fixing tap coefficients in a programmable finite-impulse-response equalizer 有权
    在可编程有限脉冲响应均衡器中固定抽头系数

    公开(公告)号：US08625226B2

    公开(公告)日：2014-01-07

    申请号：US13304227

    申请日：2011-11-23

    申请人： Eric Rolf Christensen ,  Ernest Stewart Gale ,  Robert Allen Hutchins ,  Sedat Oelcer

    发明人： Eric Rolf Christensen ,  Ernest Stewart Gale ,  Robert Allen Hutchins ,  Sedat Oelcer

    IPC分类号： G11B5/035 ,  G11B20/10 ,  H03H7/30 ,  H03H7/40 ,  H03K5/159

    CPC分类号： G11B20/10046 ,  G11B20/10509 ,  G11B2220/90 ,  H03H21/0012 ,  H03H2021/0072

    摘要： A method for selecting which tap coefficients of a programmable finite-impulse-response (FIR) equalizer to fix is disclosed. In one embodiment, such a method includes performing an initial calibration to determine an initial value for each tap coefficient of a FIR equalizer. These initial values may be used to produce a first waveform. The method then performs an operation on the first waveform to produce a second waveform comprising multiple lobes. The second waveform is then analyzed to determine one or more lobes of the second waveform that have the largest area. The method then fixes coefficients of one or more taps that are closest to the lobe or lobes having the largest area. A corresponding apparatus and computer program product are also disclosed.

    摘要翻译： 公开了一种用于选择可修复有限脉冲响应（FIR）均衡器的抽头系数以进行固定的方法。 在一个实施例中，这种方法包括执行初始校准以确定FIR均衡器的每个抽头系数的初始值。 这些初始值可用于产生第一波形。 该方法然后对第一波形执行操作以产生包括多个波瓣的第二波形。 然后分析第二波形以确定具有最大面积的第二波形的一个或多个波瓣。 该方法然后固定最靠近具有最大面积的凸角或凸角的一个或多个抽头的系数。 还公开了相应的装置和计算机程序产品。

    Technique for fixing tap coefficients in a programmable finite-impulse-response equalizer
    5.
    发明授权
    Technique for fixing tap coefficients in a programmable finite-impulse-response equalizer 失效
    在可编程有限脉冲响应均衡器中固定抽头系数的技术

    公开(公告)号：US08605380B1

    公开(公告)日：2013-12-10

    申请号：US13550603

    申请日：2012-07-17

    申请人： Eric Rolf Christensen ,  Ernest Stewart Gale ,  Robert Allen Hutchins ,  Sedat Oelcer

    发明人： Eric Rolf Christensen ,  Ernest Stewart Gale ,  Robert Allen Hutchins ,  Sedat Oelcer

    IPC分类号： G11B5/035

    CPC分类号： G11B5/00817 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/10046 ,  G11B2220/90

    摘要： A method for selecting which tap coefficients of a programmable finite-impulse-response (FIR) equalizer to fix includes performing an initial calibration to determine an initial value for each tap coefficient of a FIR equalizer. Using these initial values, a “total” FIR equalizer is determined which sets the tap coefficients to their initial values. The method further determines multiple sets of tap coefficients that may potentially be fixed in the FIR equalizer. For each set of tap coefficients that may potentially be fixed, the method determines a “fixed” FIR equalizer that sets the tap coefficients in the set to their initial values and other tap coefficients to zero. The method then determines a phase-difference energy between the “total” FIR equalizer and the “fixed” FIR equalizer for each set of tap coefficients that may potentially be fixed. The set of tap coefficients associated with the lowest phase-difference energy are then fixed.

    摘要翻译： 用于选择要修复的可编程有限脉冲响应（FIR）均衡器的抽头系数的方法包括执行初始校准以确定FIR均衡器的每个抽头系数的初始值。 使用这些初始值，确定“总共”FIR均衡器，其将抽头系数设置为其初始值。 该方法还确定可能在FIR均衡器中可能固定的多组抽头系数。 对于潜在固定的每组抽头系数，该方法确定一个“固定”FIR均衡器，其将集合中的抽头系数设置为其初始值和其他抽头系数为零。 该方法然后确定可能可能固定的每组抽头系数的“总”FIR均衡器和“固定”FIR均衡器之间的相位差能量。 然后，与最低相位差能量相关联的抽头系数的集合是固定的。

    Apparatus and method for reducing data loss in tape media due to media edge damage on thrown wraps
    6.
    发明授权
    Apparatus and method for reducing data loss in tape media due to media edge damage on thrown wraps 失效
    用于减少由于介质边缘损坏引起的包裹带在磁带介质中的数据丢失的装置和方法

    公开(公告)号：US06850381B2

    公开(公告)日：2005-02-01

    申请号：US09846847

    申请日：2001-05-01

    申请人： Alex Chliwnyj ,  Robert Allen Hutchins ,  James Mitchell Karp

    发明人： Alex Chliwnyj ,  Robert Allen Hutchins ,  James Mitchell Karp

    IPC分类号： G11B15/06 ,  G11B15/087 ,  G11B15/18 ,  G11B15/48 ,  G11B19/02

    CPC分类号： G11B15/48 ,  G11B15/06 ,  G11B15/087 ,  G11B15/18 ,  G11B15/67

    摘要： A data storage magnetic tape uses a volume control region (VCR) that contains all of the control information for the tape. There is a large span of blank tape after the VCR region before the actual data storage region of the tape. When a tape drive spools the tape between the VCR and data storage region, the tape motion is continued past the VCR region, after the VCR region is updated, into the region of tape where there is no data of any kind. Just before reaching the data storage region, the motion of the tape is reversed and the tape is rewound into the cartridge. The portion of the tape that experiences the motion reversal is prone to be thrown such that it protrudes from the other layers of uniformly layered tape. Even if these thrown wraps are damaged, this portion of the tape has no stored data, which increases the overall reliability of the information stored on the tape.

    摘要翻译： 数据存储磁带使用包含磁带的所有控制信息的音量控制区域（VCR）。 在磁带的实际数据存储区域之前，在VCR区域之后存在大量的空白磁带。 当磁带驱动器在VCR和数据存储区域之间卷绕磁带时，磁带运动在VCR区域被更新之后继续经过VCR区域进入没有任何数据的磁带区域。 在到达数据存储区域之前，磁带的运动被反转，并且磁带被倒回到磁带盒中。 经历运动反转的带的部分容易被抛出，使得其从均匀分层的带的其它层突出。 即使这些丢弃的包装被损坏，磁带的这部分也没有存储数据，这增加了存储在磁带上的信息的整体可靠性。

    Multi-channel data detection phase locked loop error combination logic
    10.
    发明授权
    Multi-channel data detection phase locked loop error combination logic 失效
    多通道数据检测锁相环路错误组合逻辑

    公开(公告)号：US07777980B2

    公开(公告)日：2010-08-17

    申请号：US11870853

    申请日：2007-10-11

    申请人： Robert Allen Hutchins ,  Jens Jelitto ,  Sedat Oelcer

    发明人： Robert Allen Hutchins ,  Jens Jelitto ,  Sedat Oelcer

    IPC分类号： G11B5/09

    CPC分类号： G11B20/10009 ,  G11B20/10037 ,  G11B20/10425

    摘要： Phase-error combination for a multi-channel data detection system with a phase locked loop for each channel, comprises receiving phase error information with respect to each channel; combination logic configured to combine the received phase error information and generate a combined phase error; and a phase-error output configured to apply the combined phase error to at least one channel phase locked loop. Additionally, error signal combination comprises receiving error information of a signal relevant to a phase locked loop with respect to each channel; combination logic configured to combine the received error signal information and generate a combined error signal, weighting the received error signal information from each channel, for example with reliability information. An error compensation output is configured to apply the combined, weighted error signal to at least one channel phase locked loop.

    摘要翻译： 具有用于每个通道的锁相环的多通道数据检测系统的相位误差组合包括接收关于每个通道的相位误差信息; 组合逻辑，被配置为组合所接收的相位误差信息并产生组合的相位误差; 以及被配置为将组合的相位误差应用于至少一个通道锁相环的相位误差输出。 另外，误差信号组合包括相对于每个信道接收与锁相环相关的信号的误差信息; 组合逻辑，其被配置为组合所接收的误差信号信息并产生组合误差信号，例如对可靠性信息加权来自每个信道的接收到的误差信号信息。 误差补偿输出被配置为将组合的加权误差信号应用于至少一个通道锁相环。