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    HEAD DESIGN FOR WRITING SERVO PATTERNS ON MAGNETIC TAPE
    21.
    发明申请
    HEAD DESIGN FOR WRITING SERVO PATTERNS ON MAGNETIC TAPE 有权
    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。

    Synchronous servo channel for longitudinal position detection and position error signal generation in tape drive systems
    23.
    发明授权
    Synchronous servo channel for longitudinal position detection and position error signal generation in tape drive systems 有权
    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。

    Magnetic tape servo format allowing for increased linear tape density and systems thereof
    24.
    发明授权
    Magnetic tape servo format allowing for increased linear tape density and systems thereof 有权
    磁带伺服格式允许增加线性带密度及其系统

    公开(公告)号：US08446684B2

    公开(公告)日：2013-05-21

    申请号：US12691604

    申请日：2010-01-21

    申请人： Nhan X. Bui ,  Giovanni Cherubini ,  Evangelos S. Eleftheriou ,  Reed A. Hancock ,  Robert A. Hutchins

    发明人： Nhan X. Bui ,  Giovanni Cherubini ,  Evangelos S. Eleftheriou ,  Reed A. Hancock ,  Robert A. Hutchins

    IPC分类号： G11B5/09

    CPC分类号： G11B21/103 ,  G11B5/584 ,  G11B15/18

    摘要： According to one embodiment, a magnetic recording tape includes a plurality of servo tracks, each servo track comprising a series of magnetically defined bars having an average height of between about 80 microns and about 120 microns, wherein an average stripe angle of the bars is between about 10° and about 25°. A stripe angle is measured between a longitudinal axis of each respective bar and a line oriented perpendicular to a direction of tape travel and parallel to a plane of the tape, wherein an average stripe width of the bars is between about 1.0 micron and about 2.2 microns and an average servo frame length of groups of the bars comprising a servo frame is between about 120 microns and about 180 microns. In more embodiments, a servo format and a system including a servo format are disclosed, along with other embodiments of magnetic tapes.

    摘要翻译： 根据一个实施例，磁记录带包括多个伺服轨道，每个伺服轨道包括一系列具有介于约80微米与约120微米之间的平均高度的磁力限定的杆，其中杆的平均条纹角在 约10°和约25°。 在每个相应的条的纵向轴线和垂直于带行进方向并且平行于带的平面定向的线之间测量条纹角度，其中条的平均条纹宽度在约1.0微米至约2.2微米之间 并且包括伺服框架的杆的组的平均伺服框架长度在大约120微米和大约180微米之间。 在更多实施例中，公开了伺服格式和包括伺服格式的系统以及磁带的其他实施例。

    Storage device and operating method therefor
    25.
    发明授权
    Storage device and operating method therefor 失效
    存储设备及其操作方法

    公开(公告)号：US08089833B2

    公开(公告)日：2012-01-03

    申请号：US11506229

    申请日：2006-08-18

    申请人： Giovanni Cherubini ,  Evangelos S. Eleftheriou ,  Charalampos Pozidis

    发明人： Giovanni Cherubini ,  Evangelos S. Eleftheriou ,  Charalampos Pozidis

    IPC分类号： G11B7/00

    CPC分类号： G11B9/1454 ,  B82Y10/00 ,  G11B11/007 ,  G11B2005/0021

    摘要： A storage device including a storage medium for storing data in the form of marks in multiple tracks aligned along track center lines, at least one read transducer for writing and reading said data stored in said storage medium, and an actuator for moving said storage medium relative to said at least one read transducer. The storage device further includes stored servo sequences, which are replicated by use of at least two different types of servo marks displaced by a given unique distance in a cross track direction relative to a respective track centerline, wherein the storage device is operable to retrieve servo sequences using read-back signals obtained from at least two different types of servo marks.

    摘要翻译： 一种存储装置，包括存储介质，用于以沿轨道中心线对准的多个轨道中的标记形式存储数据;至少一个读取换能器，用于写入和读取存储在所述存储介质中的所述数据;以及致动器，用于移动所述存储介质相对 到所述至少一个读取换能器。 存储装置还包括存储的伺服序列，其通过使用相对于相应轨道中心线在交叉轨道方向上移位给给定唯一距离的至少两种不同类型的伺服标记来复制，其中存储装置可操作以检索伺服 使用从至少两种不同类型的伺服标记获得的读回信号的序列。

    WORD SYNCHRONIZATION FOR SERVO READ SIGNALS IN TAPE DRIVES
    27.
    发明申请
    WORD SYNCHRONIZATION FOR SERVO READ SIGNALS IN TAPE DRIVES 有权
    用于伺服读取信号在磁带驱动器中的字同步

    公开(公告)号：US20090316773A1

    公开(公告)日：2009-12-24

    申请号：US12487050

    申请日：2009-06-18

    申请人： Roy Daron Cideciyan ,  Giovanni Cherubini ,  Evangelos S. Eleftheriou ,  Jens Jelitto

    发明人： Roy Daron Cideciyan ,  Giovanni Cherubini ,  Evangelos S. Eleftheriou ,  Jens Jelitto

    IPC分类号： H03K9/04

    CPC分类号： G11B5/584

    摘要： Methods and apparatus for detecting L-bit sync words occurring at N-bit intervals in PPM-encoded servo pattern read signals read in magnetic tape drives. A soft output detector processes the PPM-encoded servo pattern read signal to produce a series of soft output samples corresponding to respective bits encoded in the servo pattern. A sync word detector then produces block correlation values for respective positions of a sliding L-sample block in the series of soft output samples by (i) calculating at each block position bit correlation values indicating correlation between respective samples and corresponding bits of the sync word and (ii) summing each bit correlation value minus a predetermined function of the corresponding sample value. The sync word detector then detects a sync word at the block position with the maximum block correlation value in an (N+L−1)-sample sequence of the series of soft output samples.

    摘要翻译： 用于检测在磁带驱动器中读取的PPM编码的伺服模式读取信号中以N位间隔发生的L位同步字的方法和装置。 软输出检测器处理PPM编码的伺服模式读取信号以产生与伺服模式中编码的各个位对应的一系列软输出样本。 同步字检测器然后通过以下步骤产生一系列软输出样本中的滑动L样本块的相应位置的块相关值：（i）在每个块位置计算指示相应采样和同步字的相应位之间的相关性的位相关值 和（ii）将每个比特相关值减去减去对应样本值的预定函数。 同步字检测器随后在软输出样本序列的（N + L-1） - 采样序列中检测具有最大块相关值的块位置处的同步字。