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公开(公告)号：US09734854B2
公开(公告)日：2017-08-15
申请号：US14829921
申请日：2015-08-19
CPC分类号： G11B5/6082 , G11B5/00813 , G11B5/1871 , G11B5/255 , G11B5/60
摘要： A unidirectional and bi-directional tape head with sub-ambient pressure cavities. The tape head is adapted for reading and/or writing to a magnetic tape. The tape head includes: a tape-bearing surface; a transducer area, having at least one transducer designed for reading and/or writing to the magnetic tape; and a cavity open on the tape-bearing surface adjacent to the transducer area that extends parallel to the transducer area and transversally to the longitudinal direction of circulation of the tape such that an opening of the cavity faces the tape in operation. The cavity is further dimensioned and arranged with respect to the transducer area to create, upon circulation of the tape in operation, sub-ambient pressure therein. The present invention allows for a very close tape-head spacing.
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公开(公告)号：US09691414B1
公开(公告)日：2017-06-27
申请号：US15201074
申请日：2016-07-01
CPC分类号： G11B5/00813 , G11B5/102 , G11B5/1871 , G11B5/3169
摘要： A tape head includes a body, which includes a transducer. The transducer may be a read or write element, respectively configured so as for the tape head to read from or write to a tape, in operation. The body exhibits a tape-bearing surface, which is typically configured to face and interact with the tape, in operation. The tape head further includes a closure. The closure is fixed on a leading side or a trailing side of the body and includes a skiving edge vis-à-vis the transducer. The skiving edge is adjoined by non-skiving edges. Finally, the closure has a top surface that meets the skiving edge; the top surface is level with the tape-bearing surface. Also included are related devices; tape head apparatuses for recording and/or reproducing tapes, comprising such tape heads; and methods of fabrication thereof.
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公开(公告)号：US09612905B2
公开(公告)日：2017-04-04
申请号：US14984086
申请日：2015-12-30
发明人： Roy D. Cideciyan , Simeon Furrer , Mark A. Lantz , Keisuke Tanaka
CPC分类号： G06F11/1076 , G06F3/0619 , G06F3/064 , G06F3/0682 , H03M13/1102 , H03M13/1515 , H03M13/152 , H03M13/2707 , H03M13/2909
摘要： A block of data is partitioned into a plurality of sub-blocks each including a logical array having rows and columns of data symbols, encoded using a row linear block code and a column linear block code. Each product codeword includes a logical array of code symbols having rows which include respective row codewords and columns which include respective column codewords. The product codewords are encoded by encoding groups of L symbols, using a rate-L/(L+M) linear block code to produce a plurality of (L+M)-symbol codewords which are logically arranged in nQ encoded blocks (where n is an integer greater than zero). Each of the nQ encoded blocks includes an array having rows and columns of code symbols in which each column includes a codeword of the column code.
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84.发明授权Mechanical resonator with a spring-mass system comprising a phase-change material 有权具有包括相变材料的弹簧质量系统的机械谐振器公开(公告)号：US09584092B2
公开(公告)日：2017-02-28
申请号：US14686509
申请日：2015-04-14
CPC分类号： H03H9/02393 , B81B3/0045 , B81B3/007 , B81B7/008 , B81B2203/0163 , B81C1/00698 , B81C2201/017 , H02N11/00 , H03H9/02244 , H03H2009/02165 , H03H2009/02299 , H03H2009/02322
摘要： A mechanical resonator includes a spring-mass system, wherein the spring-mass system comprises a phase-change material. The mechanical resonator typically comprises an electrical circuit portion, coupled to the phase-change material to alter a phase configuration within the phase-change material. Methods of operation are also disclosed.
摘要翻译： 机械谐振器包括弹簧质量系统，其中弹簧质量系统包括相变材料。 机械谐振器通常包括耦合到相变材料的电路部分，以改变相变材料内的相位配置。 还公开了操作方法。
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85.发明授权Method for controlling the lateral position of a tape head of a magnetic tape drive 有权用于控制磁带驱动器的磁带头的横向位置的方法公开(公告)号：US09564161B1
公开(公告)日：2017-02-07
申请号：US14937028
申请日：2015-11-10
摘要： Embodiments include methods, systems and computer program products for controlling a lateral position of a tape head of a magnetic tape drive. Aspects include determining a first servo signal by reading position marks from a first servo band on a magnetic tape using a first sensor and determining a second servo signal by reading position marks from a second servo band on the magnetic tape using a second sensor. Aspects also include delaying the first servo signal relative to the second servo signal by a delay and calculating an average signal based on the first and the delayed second servo signal. Aspects further include determining servo information from the average signal indicative of a deviation of the lateral position of the tape head from an ideal lateral position of the tape head and controlling the tape head to adjust its lateral position such that the deviation is decreased.
摘要翻译： 实施例包括用于控制磁带驱动器的磁带头的横向位置的方法，系统和计算机程序产品。 方面包括通过使用第一传感器从磁带上的第一伺服带读取位置标记来确定第一伺服信号，并且使用第二传感器通过从磁带上的第二伺服带读取位置标记来确定第二伺服信号。 方面还包括延迟相对于第二伺服信号的第一伺服信号延迟并基于第一和延迟的第二伺服信号计算平均信号。 方面还包括从平均信号中确定伺服信息，该平均信号指示磁带头的横向位置与磁带头的理想横向位置的偏差，并且控制磁带头以调整其横向位置，使得偏差减小。
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公开(公告)号：US20160365110A1
公开(公告)日：2016-12-15
申请号：US14985255
申请日：2015-12-30
发明人： Simeon Furrer , Robert A. Hutchins , Jens Jelitto , Mark A. Lantz
CPC分类号： G11B20/10259 , G01R31/31922 , G11B5/00813 , G11B5/00826 , G11B5/02 , G11B5/29 , G11B5/584 , G11B20/10037 , G11B20/10046 , H04L25/05
摘要： An apparatus includes a loop filter that receives a plurality of input signals. Each of the input signals is based on a different timing error detector output signal. The apparatus also includes a plurality of read channels, a plurality of interpolation filters, and an array of transducers. Each of the interpolation filters is in communication with a corresponding one of the read channels. Each of the transducers is in communication with a corresponding one of the read channels. The loop filter processes the plurality of input signals, and outputs a different total phase signal for each received input signal. Each of the interpolation filters samples the corresponding read channel based on one of the total phase signals output by the loop filter. The loop filter processes the plurality of input signals by calculating a phase estimate of the samples, and a skew estimate of the samples, relative to written data.
摘要翻译： 一种装置包括接收多个输入信号的环路滤波器。 每个输入信号基于不同的定时误差检测器输出信号。 该装置还包括多个读取通道，多个内插滤波器和换能器阵列。 每个内插滤波器与所读取的通道中的相应一个通信。 每个换能器与相应的一个读通道通信。 环路滤波器处理多个输入信号，并且为每个接收到的输入信号输出不同的总相位信号。 每个内插滤波器基于环路滤波器输出的总相位信号之一对相应的读取通道进行采样。 环路滤波器通过计算采样的相位估计和相对于写入数据的样本的偏斜估计来处理多个输入信号。
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87.发明授权Method for writing a servo pattern to a magnetic tape medium with magnetically encoded servo band bursts 有权将伺服模式写入具有磁编码伺服带阵列的磁带介质的方法公开(公告)号：US09514769B2
公开(公告)日：2016-12-06
申请号：US14791668
申请日：2015-07-06
IPC分类号： G11B5/265 , G11B5/17 , G11B15/087 , G11B5/584 , G11B5/78 , G11B5/008 , G11B20/12 , G11B5/592
CPC分类号： G11B20/1201 , G11B5/00813 , G11B5/00817 , G11B5/00826 , G11B5/17 , G11B5/265 , G11B5/584 , G11B5/5928 , G11B15/087 , G11B2220/956
摘要： A method for writing a servo pattern to a magnetic tape medium by a write head is described. The write head includes a coil configured to generate a magnetic flux when applying an electric current thereto, and a pole piece structure configured to guide the generated magnetic flux. The method includes moving the magnetic tape medium with its servo band above the two gaps in a direction along the longitudinal extension of the magnetic tape medium, applying a current pulse to the coil, continuing to move the magnetic tape medium, and applying another current pulse to the coil. The magnetic tape medium includes at least one servo band along the longitudinal extension of the tape medium having servo patterns organized in servo frames for supporting to determine positional information.
摘要翻译： 描述了一种通过写头将伺服模式写入磁带介质的方法。 写头包括被配置为在施加电流时产生磁通量的线圈，以及构造成引导所产生的磁通量的极片结构。 该方法包括将磁带介质的两个间隙的磁带介质沿着磁带介质的纵向延伸方向移动到两个间隙之上，向线圈施加电流脉冲，继续移动磁带介质，并施加另一个电流脉冲 到线圈。 磁带介质包括沿着带介质的纵向延伸的至少一个伺服带，其具有组织在伺服框架中的伺服图案，用于确定位置信息。
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公开(公告)号：US20160329914A1
公开(公告)日：2016-11-10
申请号：US14703756
申请日：2015-05-04
CPC分类号： H03M13/2909 , G06F11/1076 , G11B20/1833 , H03M13/1102 , H03M13/1515 , H03M13/152 , H03M13/2707 , H03M13/2918 , H03M13/293 , H03M13/616
摘要： In one embodiment, a method includes reading packets of data from M parallel data tracks of a magnetic tape to obtain a plurality of (D+P)-symbol codewords which are logically arranged in nM encoded blocks, each packet including a row of an encoded block, where each encoded block includes an array having rows and columns of code symbols, wherein symbols of each of the (D+P)-symbol codewords are distributed over corresponding rows of the nM encoded blocks, decoding sub-blocks from rows and columns of a plurality of product codewords from the nM encoded blocks, each product codeword including a logical array of code symbols having the rows which include respective row codewords and the columns which include respective column codewords, where each sub-block includes a logical array having rows and columns of data symbols, combining the sub-blocks to form a block of data, and outputting the block of data.
摘要翻译： 在一个实施例中，一种方法包括从磁带的M个并行数据磁道读取数据包，以获得逻辑上排列成nM个编码块的多个（D + P）符号码字，每个数据包包括编码 块，其中每个编码块包括具有代码符号的行和列的阵列，其中每个（D + P）符号码字符号的符号分布在nM个编码块的相应行上，从行和列解码子块 从nM个编码块的多个产品码字中，每个产品码字包括具有包括各行代码字的行的代码符号的逻辑阵列和包括相应的列码字的列，其中每个子块包括具有行的逻辑阵列 和数据符号列，组合子块以形成数据块，并输出数据块。
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公开(公告)号：US20160329069A1
公开(公告)日：2016-11-10
申请号：US15215495
申请日：2016-07-20
发明人： Robert G. Biskeborn , Mark A. Lantz
CPC分类号： G11B5/584 , G11B5/00817 , G11B15/18 , G11B20/1202
摘要： A product according to one embodiment includes a magnetic recording tape having opposite ends and at least one servo track, a longitudinal axis of the magnetic recording tape being defined between the ends. The at least one servo track has a plurality of straight first magnetic bars, and a plurality of straight second magnetic bars spaced from the first magnetic bars. A width of each of the at least one servo track is defined in a direction perpendicular to the longitudinal axis of the magnetic recording tape between sides of the servo track. Lengths of the second magnetic bars between outermost ends thereof are less than 80% of the width of the associated servo track, straight portions of the second magnetic bars each having a longitudinal axis oriented substantially 90 degrees from the longitudinal axis of the magnetic recording tape.
摘要翻译： 根据一个实施例的产品包括具有相对端和至少一个伺服轨道的磁记录带，磁记录带的纵向轴线被限定在端部之间。 所述至少一个伺服轨道具有多个直的第一磁条和与所述第一磁条间隔开的多个直的第二磁条。 所述至少一个伺服轨道中的每一个的宽度在与所述伺服轨道的侧面之间的磁记录带的纵向轴线垂直的方向上被限定。 其最外端之间的第二磁条的长度小于相关伺服轨道的宽度的80％，第二磁棒的直线部分各自具有从磁记录带的纵向轴线大致成90度的纵向轴线。
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公开(公告)号：US09443540B2
公开(公告)日：2016-09-13
申请号：US14849525
申请日：2015-09-09
发明人： Robert G. Biskeborn , Mark A. Lantz
CPC分类号： G11B5/584 , G11B5/00817 , G11B15/18 , G11B20/1202
摘要： A product according to one embodiment includes a magnetic recording tape having opposite ends and at least one servo track, a longitudinal axis of the magnetic recording tape being defined between the ends. The at least one servo track has a plurality of straight first magnetic bars, and a plurality of straight second magnetic bars spaced from the first magnetic bars. A width of each of the at least one servo track is defined in a direction perpendicular to the longitudinal axis of the magnetic recording tape between sides of the servo track, the sides of each servo track extending along opposite ends of the each of the first magnetic bars. Lengths of the second magnetic bars between outermost ends thereof are less than the width of the associated servo track.
摘要翻译： 根据一个实施例的产品包括具有相对端和至少一个伺服轨道的磁记录带，磁记录带的纵向轴线被限定在端部之间。 所述至少一个伺服轨道具有多个直的第一磁条和与所述第一磁条间隔开的多个直的第二磁条。 所述至少一个伺服轨道中的每一个的宽度在与所述伺服轨道的侧面之间的所述磁记录带的纵向轴线垂直的方向上被限定，每个伺服轨道的每个所述第一磁体 酒吧。 其最外端之间的第二磁条的长度小于相关联的伺服轨道的宽度。
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