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61. 发明申请

US20100226037A1 COMBINING INFORMATION FROM PARALLEL SERVO CHANNELS 失效
标题翻译：从并行伺服通道组合信息
公开(公告)号：US20100226037A1
公开(公告)日：2010-09-09
申请号：US12400369
申请日：2009-03-09
申请人： Nhan Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
发明人： Nhan Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
IPC分类号： G11B5/596 , G11B5/584
CPC分类号： G11B5/584
摘要： A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module servo module comprises two servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have outputs for an unweighted metric and for a measure of the channel reliability. A weight computation module provides first and second weight signals using the measures of channel reliability from the servo channels. A first multiplying node receives a first unweighted metric and a first weight signal and is operable to output a first weighted metric. A second multiplying node receives a second unweighted metric and a second weight signal and outputs a second weighted metric. A summing node receives the first and second weighted metrics and outputs a combined weighted metric to an LPOS word decoder.
摘要翻译：加权组合方案利用来自并行操作的两个伺服通道的信息。基于定时的伺服模块伺服模块包括分别耦合的两个伺服通道，以接收从数据磁带读取的两个数字伺服信号。两个通道都具有未加权度量的输出和通道可靠性的度量。权重计算模块使用来自伺服信道的信道可靠性的测量来提供第一和第二加权信号。第一乘法节点接收第一未加权度量和第一加权信号，并且可操作以输出第一加权度量。第二乘法节点接收第二未加权度量和第二加权信号并输出第二加权度量。求和节点接收第一和第二加权度量，并将组合加权度量输出到LPOS字解码器。

62. 发明授权

US07742254B2 Servo channel for tape drive systems 有权
标题翻译：磁带驱动系统的伺服通道
公开(公告)号：US07742254B2
公开(公告)日：2010-06-22
申请号：US11969184
申请日：2008-01-03
申请人： Giovanni Cherubini , Roy Daron Cideciyan , Evangelos S. Eleftheriou , Robert Allen Hutchins , Jens Jelitto
发明人： Giovanni Cherubini , Roy Daron Cideciyan , Evangelos S. Eleftheriou , Robert Allen Hutchins , Jens Jelitto
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： Provided are techniques for synchronous servo channel for a data tape drive. A servo reader is configured to read servo bursts from a data tape. An anti-aliasing filter is operable to output a bandlimited signal and is coupled to receive a servo channel signal comprising servo bursts from the servo reader. An analog-to-digital converter (ADC) is operable to output signal samples and is coupled to receive the bandlimited signal from the anti-aliasing filter. An interpolation and control unit is operable to output interpolated signal samples and control signals, has a first input coupled to receive the signal samples from the ADC, and has a second input coupled to receive the correlation signal samples from the dibit correlator. A dibit correlator is operable to output correlation signal samples and is coupled to receive the interpolated signal samples and control signals from the interpolation and control unit.
摘要翻译：提供了用于数据磁带驱动器的同步伺服通道的技术。伺服读取器被配置为从数据磁带读取伺服脉冲串。抗混叠滤波器可操作以输出带限信号，并且耦合以接收包括来自伺服读取器的伺服脉冲串的伺服信道信号。模数转换器（ADC）可操作以输出信号采样并被耦合以从抗混叠滤波器接收带限信号。内插和控制单元可操作以输出内插信号样本和控制信号，具有耦合以从ADC接收信号样本的第一输入，并具有耦合以从双位相关器接收相关信号样本的第二输入。双向相关器可操作以输出相关信号样本，并被耦合以从内插和控制单元接收内插的信号样本和控制信号。

63. 发明授权

US07733592B2 Methods for multi-channel data detection phase locked loop frequency error combination 失效
标题翻译：多通道数据检测方法锁相环频率误差组合
公开(公告)号：US07733592B2
公开(公告)日：2010-06-08
申请号：US11870934
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： H04L7/0029 , H03L7/07 , H03L7/087 , H03L7/091 , H04L7/0025 , H04L7/0062 , H04L7/0083
摘要： Frequency error combination for a multi-channel data detection system with a phase locked loop for each channel, comprises receiving frequency error information of a signal relevant to a phase locked loop with respect to each channel; combining the received error signal information and generating a combined error signal, weighting the received error signal information from each channel, for example with reliability information. The combined frequency error signal is applied to at least one channel phase locked loop.
摘要翻译：针对每个通道具有锁相环的多通道数据检测系统的频率误差组合包括相对于每个通道接收与锁相环相关的信号的频率误差信息; 组合接收到的误差信号信息并产生组合误差信号，例如用可靠性信息对来自每个信道的接收到的误差信号进行加权。组合的频率误差信号被施加到至少一个通道锁相环。

64. 发明申请

US20100073800A1 RECOVERING SERVO INFORMATION FROM A SYNCHRONOUS SERVO CHANNEL 失效
标题翻译：从同步伺服通道恢复伺服信息
公开(公告)号：US20100073800A1
公开(公告)日：2010-03-25
申请号：US12236450
申请日：2008-09-23
申请人： Giovanni Cherubini , Robert Allen Hutchins , Jens Jelitto
发明人： Giovanni Cherubini , Robert Allen Hutchins , Jens Jelitto
IPC分类号： G11B5/09
CPC分类号： G11B5/59644 , G11B20/10009 , G11B20/10037 , G11B20/10231 , G11B20/10527 , G11B2020/10759 , G11B2020/1281 , G11B2220/956
摘要： Provided are a method, servo channel, and tape drive for recovering servo information from a synchronous servo channel. An interpolator reads samples of a servo signal obtained from a servo reader at a rate of one servo sample per clock interval, to produce up to M interpolated servo samples per clock interval. A first buffer buffers interpolation time instants at which the interpolator generates interpolated servo samples. The interpolated servo samples are buffered in a second buffer and the interpolated servo samples are outputted from the second buffer to a correlator to produce correlation signal samples.
摘要翻译：提供了用于从同步伺服通道恢复伺服信息的方法，伺服通道和磁带驱动器。内插器以每个时钟间隔的一个伺服采样的速率读取从伺服读取器获得的伺服信号的采样，以便每个时钟间隔产生多达M个内插的伺服采样。第一缓冲器缓冲内插时间内插器产生内插伺服采样的时间。内插伺服采样被缓冲在第二缓冲器中，并且内插伺服采样从第二缓冲器输出到相关器以产生相关信号采样。

65. 发明申请

US20090279202A1 HEAD DESIGN FOR WRITING SERVO PATTERNS ON MAGNETIC TAPE 有权
标题翻译：用于在磁带上书写伺服模式的头设计
公开(公告)号：US20090279202A1
公开(公告)日：2009-11-12
申请号：US12118251
申请日：2008-05-09
申请人： Giovanni Cherubini , Roy D. Cideciyan , Evangelos S. Eleftheriou , Jens Jelitto , Mark A. Lantz
发明人： Giovanni Cherubini , Roy D. Cideciyan , Evangelos S. Eleftheriou , Jens Jelitto , Mark A. Lantz
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： A servo write head is provided and is configured to simultaneously write at least two servo patterns in respective servo bands on linear magnetic tape. Centerlines of the servo patterns are substantially uniformly spaced in the lateral direction. In addition, the servo patterns of all adjacent respective servo bands are displaced relative to each other in a longitudinal direction by an amount that is related to a length of a servo frame and a type of the servo patterns.
摘要翻译：提供了伺服写入头，并被配置为在线性磁带上的相应伺服带中同时写入至少两个伺服模式。伺服图案的中心线在横向方向上基本上均匀间隔开。此外，所有相邻的各个伺服带的伺服模式在纵向方向上相对于伺服帧的长度和伺服模式的类型相关的量而移位。

66. 发明申请

US20090097603A1 COMMON STATE-SPACE MULTI-CHANNEL DIGITAL SAMPLE TIMING PHASE CONTROL OF MULTIPLE READ CHANNELS FOR CORRELATED SIGNALS 失效
标题翻译：通用状态空间多通道数字样本时序相位控制多个读取通道的相关信号
公开(公告)号：US20090097603A1
公开(公告)日：2009-04-16
申请号：US11870765
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： H04L7/00
CPC分类号： H03L7/0994 , G11B20/10037 , G11B20/1403 , G11B20/20 , H03L7/07 , H03L7/093
摘要： Common sample timing control for sample timing of multiple read channels, wherein the signal clocking of the signals received by the multiple read channels are correlated, for example from parallel tracks of magnetic tape that have been written simultaneously. In one embodiment, a common sample timing control comprises multiple phase error inputs, each indicating phase error of one of the read channels. Logic responsive to the multiple phase error inputs is configured to weight and crosscouple the phase error indication of each phase error input with the phase error indication of each other phase error input, and to apply gain related to the variance of noise of the phase error indications. Feedback logic is responsive to the crosscoupling and is configured to provide a sample timing phase estimate for each read channel.
摘要翻译：用于多个读取通道的采样定时的公共采样定时控制，其中由多个读取通道接收的信号的信号时钟与例如已经被同时写入的磁带的平行磁道相关。在一个实施例中，公共采样定时控制包括多个相位误差输入，每个相位误差输入指示一个读取通道的相位误差。响应于多个相位误差输入的逻辑被配置为对每个相位误差输入的相位误差指示进行加权和交叉耦合，并且将每个相位误差输入的相位误差指示与相位误差指示的噪声方差相关联。反馈逻辑响应于交叉耦合，并且被配置为为每个读取通道提供采样定时相位估计。

67. 发明申请

US20080297937A1 USING A MEASURED ERROR TO DETERMINE COEFFICIENTS TO PROVIDE TO AN EQUALIZER TO USE TO EQUALIZE AN INPUT SIGNAL 失效
标题翻译：使用测量错误确定系数以提供均衡器以均衡输入信号
公开(公告)号：US20080297937A1
公开(公告)日：2008-12-04
申请号：US12189096
申请日：2008-08-08
申请人： Evangelos S. Eleftheriou , Robert Allen Hutchins , Jens Jelitto , Sedat Oelcer
发明人： Evangelos S. Eleftheriou , Robert Allen Hutchins , Jens Jelitto , Sedat Oelcer
IPC分类号： G11B5/35
CPC分类号： G11B5/09 , G11B5/00817 , G11B20/10009 , G11B20/10046
摘要： Provided are a read channel, storage drive and method using a measured error to determine coefficients to provide to an equalizer to use to equalize an input signal. A read channel is incorporated in a storage device to process signals read from a storage medium. An equalizer uses coefficients to equalize input read signals to produce equalizer output signals. A detector processes adjusted equalizer output signals to determine output values comprising data represented by the input read signals. An equalizer adaptor is enabled to provide a reference measured error and coefficients used to produce the adjusted equalizer signals that are associated with the reference measured error. The equalizer adaptor computes new equalizer coefficients to use to equalize input read signals that result in a new measured error from the detector and computes a new measured error for the new equalizer coefficients. The equalizer adaptor determines whether the new measured error is degraded with respect to the reference measured error and saves the new equalizer coefficients and the new measured error in response to determining that the new measured error is not degraded with respect to the reference measured error. The equalizer adaptor provides the equalizer coefficients associated with the reference measured error to the equalizer to use to equalize input read signals in response to determining that the new measured error is degraded with respect to the reference measured error.
摘要翻译：提供了读通道，存储驱动器和使用测量误差的方法来确定提供给均衡器的系数以用于均衡输入信号。读取通道并入存储装置中以处理从存储介质读取的信号。均衡器使用系数来均衡输入读取信号以产生均衡器输出信号。检测器处理经调整的均衡器输出信号以确定包括由输入读信号表示的数据的输出值。启用均衡器适配器以提供参考测量误差和用于产生与参考测量误差相关联的经调整的均衡器信号的系数。均衡器适配器计算新的均衡器系数以用于均衡来自检测器的导致新的测量误差的输入读取信号，并且计算新的均衡器系数的新的测量误差。均衡器适配器确定新的测量误差是否相对于参考测量误差降级，并且响应于确定新的测量误差相对于参考测量误差而不降级而保存新的均衡器系数和新的测量误差。均衡器适配器将与参考测量误差相关联的均衡器系数提供给均衡器以用于响应于确定新的测量误差相对于参考测量误差而降级来均衡输入读取信号。

68. 发明授权

US07436615B2 Using a measured error to determine coefficients to provide to an equalizer to use to equalize an input signal 失效
标题翻译：使用测量误差来确定提供给均衡器的系数以用于均衡输入信号
公开(公告)号：US07436615B2
公开(公告)日：2008-10-14
申请号：US11298386
申请日：2005-12-08
申请人： Evangelos S. Eleftheriou , Robert Allen Hutchins , Jens Jelitto , Sedat Oelcer
发明人： Evangelos S. Eleftheriou , Robert Allen Hutchins , Jens Jelitto , Sedat Oelcer
IPC分类号： G11B5/35
CPC分类号： G11B5/09 , G11B5/00817 , G11B20/10009 , G11B20/10046
摘要： Provided are a read channel, storage drive and method using a measured error to determine coefficients to provide to an equalizer to use to equalize an input signal. A read channel is incorporated in a storage device to process signals read from a storage medium. An equalizer uses coefficients to equalize input read signals to produce equalizer output signals. A detector processes adjusted equalizer output signals to determine output values comprising data represented by the input read signals. An equalizer adaptor is enabled to provide a reference measured error and coefficients used to produce the adjusted equalizer signals that are associated with the reference measured error. The equalizer adaptor computes new equalizer coefficients to use to equalize input read signals that result in a new measured error from the detector and computes a new measured error for the new equalizer coefficients. The equalizer adaptor determines whether the new measured error is degraded with respect to the reference measured error and saves the new equalizer coefficients and the new measured error in response to determining that the new measured error is not degraded with respect to the reference measured error. The equalizer adaptor provides the equalizer coefficients associated with the reference measured error to the equalizer to use to equalize input read signals in response to determining that the new measured error is degraded with respect to the reference measured error.
摘要翻译：提供了读通道，存储驱动器和使用测量误差的方法来确定提供给均衡器的系数以用于均衡输入信号。读取通道并入存储装置中以处理从存储介质读取的信号。均衡器使用系数来均衡输入读取信号以产生均衡器输出信号。检测器处理经调整的均衡器输出信号以确定包括由输入读信号表示的数据的输出值。启用均衡器适配器以提供参考测量误差和用于产生与参考测量误差相关联的经调整的均衡器信号的系数。均衡器适配器计算新的均衡器系数以用于均衡来自检测器的导致新的测量误差的输入读取信号，并且计算新的均衡器系数的新的测量误差。均衡器适配器确定新的测量误差是否相对于参考测量误差降级，并且响应于确定新的测量误差相对于参考测量误差而不降级而保存新的均衡器系数和新的测量误差。均衡器适配器将与参考测量误差相关联的均衡器系数提供给均衡器以用于响应于确定新的测量误差相对于参考测量误差而降级来均衡输入读取信号。

69. 发明申请

US20080024904A1 SYNCHRONOUS SERVO CHANNEL FOR TAPE DRIVE SYSTEMS 失效
标题翻译：用于磁带驱动系统的同步伺服通道
公开(公告)号：US20080024904A1
公开(公告)日：2008-01-31
申请号：US11460987
申请日：2006-07-30
申请人： Giovanni Cherubini , Evangelos Eleftheriou , Robert Allan Hutchins , Jens Jelitto
发明人： Giovanni Cherubini , Evangelos Eleftheriou , Robert Allan Hutchins , Jens Jelitto
IPC分类号： G11B15/46
CPC分类号： G11B5/59688
摘要： A fully synchronous servo channel for a data tape drive is provided which includes the initial acquisition of synchronous servo channel parameters, generation of a timing basis for signal interpolation, generation of a tape velocity estimate and a y-position estimate and an optimum detection of longitudinal position (LPOS) symbols embedded in servo bursts.
摘要翻译：提供了一种用于数据磁带驱动器的完全同步伺服通道，其包括初始采集同步伺服通道参数，产生信号插值的定时基准，产生磁带速度估计和y位置估计以及纵向的最佳检测位置（LPOS）符号嵌入在伺服脉冲串中。

70. 发明授权

US07245450B1 Synchronous servo channel for longitudinal position detection and position error signal generation in tape drive systems 有权
标题翻译：用于纵向位置检测的同步伺服通道和磁带机系统中的位置误差信号产生
公开(公告)号：US07245450B1
公开(公告)日：2007-07-17
申请号：US11340030
申请日：2006-01-26
申请人： Giovanni Cherubini , Evangelos S. Eleftheriou , Robert A. Hutchins , Jens Jelitto
发明人： Giovanni Cherubini , Evangelos S. Eleftheriou , Robert A. Hutchins , Jens Jelitto
IPC分类号： G11B15/52
CPC分类号： G11B5/584
摘要： A fully synchronous longitudinal position (LPOS) detection system is provided for improving the reliability of servo channels in tape systems. The system is based on the interpolation of the servo channel output signal, which is sampled by an analog-to-digital converter (ADC) at a fixed sampling rate, using a clock at a nominal frequency, so that interpolated signal samples are obtained at a predetermined fixed rate, independent of tape velocity. This predetermined fixed rate is defined in terms of samples per unit of length, as opposed to samples per unit of time, which is the measure of the ADC sampling rate. The resolution with which the servo channel signal is obtained at the interpolator output is thus determined by the step interpolation distance.
摘要翻译：提供了全同步纵向位置（LPOS）检测系统，用于提高磁带系统中伺服通道的可靠性。该系统基于使用以标称频率的时钟由固定采样率的模数转换器（ADC）采样的伺服信道输出信号的内插，从而获得内插信号样本一个预定的固定速率，与磁带速度无关。这个预定的固定速率是根据单位长度的样本来定义的，而不是每单位时间的样本，这是ADC采样率的量度。因此，通过步进插补距离来确定在内插器输出处获得伺服信号信号的分辨率。

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