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21.发明授权Encoded servo track configurations, servo writer and systems/method regarding same 失效编码伺服磁道配置，伺服写入器和系统/方法相同
公开(公告)号：US6134070A
公开(公告)日：2000-10-17
申请号：US861664
申请日：1997-05-22
申请人： Hung T. Tran , Theodore A. Schwarz , Robert J. Youngquist , Alan R. Olson , Richard W. Molstad , Gary D. Moeller , Richard E. Jewett , Christopher L. Hill
发明人： Hung T. Tran , Theodore A. Schwarz , Robert J. Youngquist , Alan R. Olson , Richard W. Molstad , Gary D. Moeller , Richard E. Jewett , Christopher L. Hill
IPC分类号： G11B5/31 , G11B5/008 , G11B5/265 , G11B5/48 , G11B5/55 , G11B5/584 , G11B21/08 , G11B21/10 , G11B21/02
CPC分类号： G11B5/4893 , G11B21/086 , G11B21/103 , G11B5/5504 , G11B5/584 , G11B5/5508
摘要： A servo track recording tape includes a plurality of data tracks and a servo band dedicated for servo information. The servo band includes substantially uniformly written servo carrier information across a predetermined servo carrier width along the length of the tape with at least one encoded track pitch defined therein. Each encoded track pitch has alternating erased and non-erased portions along the length of the tape for defining servo tracks. The alternating erased and non-erased portions of the at least one encoded track pitch include encoded information provided by varying the length of one or more of the erased portions. The encoded information may be representative of tape locations along the length of the tape. The servo band may include two or more encoded track pitches defined in the substantially uniformly written servo carrier information with each encoded track pitch defining corresponding servo tracks. The alternating erased and non-erased portions of each of the two or more encoded track pitches may include encoded information uniquely identifying the corresponding servo tracks. Another servo tracking data recording tape includes a servo band including at least one single frequency servo track written in an erased width of the servo band along the length of the tape. The single frequency servo track includes encoded blocks of information along the length of the tape representative of at least one characteristic of the tape. Systems, head assemblies and encoding methods for use in providing such encoded servo track recording tape configurations are also described.
摘要翻译： 伺服记录磁带包括多个数据磁道和专用于伺服信息的伺服带。 伺服带包括沿着带长度的预定伺服载波宽度的基本均匀地写入的伺服载波信息，其中限定了至少一个编码的轨道间距。 每个编码的轨道间距具有沿磁带长度的交替擦除和不擦除部分，用于定义伺服磁道。 至少一个编码轨道间距的交替擦除和未擦除部分包括通过改变一个或多个擦除部分的长度而提供的编码信息。 编码信息可以代表沿磁带长度的磁带位置。 伺服带可以包括在基本均匀地写入的伺服载体信息中限定的两个或多个编码的轨道间距，每个编码的轨道间距限定对应的伺服轨道。 两个或多个编码轨道间距中的每一个的交替擦除和未擦除部分可以包括唯一地识别对应的伺服轨道的编码信息。 另一个伺服跟踪数据记录带包括一个伺服带，该伺服带包括至少一个沿着磁带长度写入伺服带的擦除宽度的单个频率伺服磁道。 单频伺服磁道包括代表带的至少一个特征的沿磁带长度的编码信息块。 还描述了用于提供这种编码伺服记录带配置的系统，头组件和编码方法。
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公开(公告)号：US06873487B2
公开(公告)日：2005-03-29
申请号：US09995175
申请日：2001-11-26
申请人： Richard W. Molstad
发明人： Richard W. Molstad
CPC分类号： G11B5/488 , G11B5/3106 , G11B5/3967 , G11B5/4893 , G11B5/53 , G11B5/59633
摘要： Servopositioning systems, methods, formats, and data recording media used in association with the same, employing both time-based and amplitude-based transverse tracking servo bands in the same or different locations on the medium.
摘要翻译： 与其相关联使用的服务定位系统，方法，格式和数据记录介质，在介质上的相同或不同位置采用基于时间和幅度的横向跟踪伺服带。
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公开(公告)号：US06754022B1
公开(公告)日：2004-06-22
申请号：US09906187
申请日：2001-07-16
申请人： Richard W. Molstad
发明人： Richard W. Molstad
IPC分类号： G11B502
CPC分类号： H03K17/04163 , G11B5/02 , G11B2005/0013 , H03K17/12
摘要： The present invention provides techniques for generating an intense magnetic pulse very quickly. The present invention includes a device that drives high current through a write head, which generates a burst of magnetic flux that in turn generates a high-intensity fringing field. To rapidly build up the current through the write head, the write head is coupled to a high voltage source. A switching circuit prevents current from flowing in the write head. In response to a signal from a control circuit, the switching circuit provides a path for current to flow through the write head. Current flow through the write head rises rapidly, which causes a burst of magnetic flux and generates a high-intensity magnetic fringing field. The high-intensity fringing field may be used to write to a magnetic medium.
摘要翻译： 本发明提供了非常快地产生强磁脉冲的技术。 本发明包括一种通过写入头驱动高电流的装置，该写入头产生一个又一次产生高强度边缘场的磁通突发。 为了通过写入头快速建立电流，写入头耦合到高电压源。 开关电路防止电流在写入头中流动。 响应于来自控制电路的信号，开关电路提供电流流过写入头的路径。 通过写入头的电流迅速上升，这导致磁通的突发并产生高强度的磁边界场。 高强度边缘场可用于写入磁介质。
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公开(公告)号：US06542325B1
公开(公告)日：2003-04-01
申请号：US09265789
申请日：1999-03-10
IPC分类号： G11B5584
CPC分类号： G11B5/5926 , G11B5/584
摘要： A servo track configuration includes at least one servo track having a width. A servo pattern is repeatedly recorded in the at least one servo track. Repeatedly recording the servo pattern includes repeating the simultaneous recording of first and second reference pattern lines and a track pattern line in the at least one servo track. Each of the first and second reference pattern lines has an identical predetermined geometry and extends across the width of the at least one servo track. Further, the track pattern line has a predetermined geometry that is different than the predetermined geometry of the first and second reference pattern lines and extends across the width of the at least one servo track.
摘要翻译： 伺服轨道配置包括具有宽度的至少一个伺服轨道。 伺服图案被重复记录在至少一个伺服轨道中。 重复地记录伺服模式包括在至少一个伺服轨道中重复同时记录第一和第二参考图案线和轨迹图案线。 第一和第二参考图案线中的每一个具有相同的预定几何形状并且延伸跨越至少一个伺服轨道的宽度。 此外，轨道图案线具有与第一和第二参考图案线的预定几何形状不同的预定几何形状，并且跨越至少一个伺服轨道的宽度延伸。
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公开(公告)号：US6078481A
公开(公告)日：2000-06-20
申请号：US93224
申请日：1998-06-08
IPC分类号： G11B23/087 , G11B23/02 , G11B5/78
CPC分类号： G11B23/087
摘要： A tape cartridge includes a first rotatable hub and a second rotatable hub and a tape head receiving region. A flexible recording tape is wound upon the first rotatable hub and the second rotatable hub. The flexible recording tape is routed through the cartridge to provide two levels or layers of tape at the tape head receiving region. The tape path may include a flexible tape routed through the cartridge to provide two levels of tape at least one of the tape guides or tape pins within the tape cartridge. Of course the tape path through the tape cartridge may also include the tape head. At startup the tape always driven in the same direction so that the layer of tape underneath the other layer of tape is initially placed in tension. This prevents binding of one layer with respect to the second layer at startup. If the initial startup direction is opposite from the desired direction, the direction of the tape is reversed within the tape cartridge. A tape for use in a tape drive including a double loop type tape path includes a substrate having a magnetic layer applied to one side of the substrate, and having a backside of soft magnetic material applied to the other side of the substrate. The backside acts as a magnetic shield to prevent writing though the layer of tape nearest the head to the layer of tape underneath the layer of tape being written to.
摘要翻译： 带盒包括第一可旋转轮毂和第二可旋转轮毂和带头接收区域。 柔性记录带卷绕在第一可旋转轮毂和第二可旋转轮毂上。 柔性记录带路由通过盒，以在磁带头接收区域提供两层或多层磁带。 磁带路径可以包括通过盒带路由的柔性带，以在带盒内的至少一个带引导件或带引脚提供两层带。 当然，通过磁带盒的磁带路径也可以包括磁带头。 在启动时，磁带总是沿相同的方向驱动，使得另一层磁带下方的磁带层最初处于张紧状态。 这防止了启动时一层相对于第二层的粘结。 如果初始启动方向与所需方向相反，则带的方向在带盒内相反。 用于包括双环型磁带路径的磁带驱动器的磁带包括具有施加到基板的一侧的磁性层并具有施加到基板的另一侧的软磁材料的背面的基板。 背面充当磁性屏蔽，以防止将最靠近磁头的磁带层写入写入的磁带层下面的磁带层。
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公开(公告)号：US5243472A
公开(公告)日：1993-09-07
申请号：US751744
申请日：1991-08-29
申请人： Richard W. Molstad
发明人： Richard W. Molstad
IPC分类号： G11B5/024
CPC分类号： G11B5/024
摘要： A series resonant AC erase head drive circuit apparatus for use with a miniaturized cartridge-type tape drive includes apparatus for generating a non-overlapping pulse wave forms and for driving switches, power switches and a voltage controlled DC current source. The pulse form generating and power switch driving apparatus includes a clock frequency input coupled to an externally supplied clock frequency signal and an enable input coupled to an externally supplied enable signal, and includes a plurality of power switch driving outputs. The power switch driving outputs provide a plurality of power switch control signals which include a non-overlapping interval. Power switches are coupled to the pulse form generating and power switch driving apparatus for switching power to the erase head in an AC fashion in response to the plurality of power switch control signals so as to allow current to flow through the erase head in a first direction for a first time interval, in a second, opposite direction for a second time interval and so as to prevent current from flowing through the erase head during the non-overlapping interval. The power switching apparatus comprises a series resonant H bridge circuit. Apparatus for providing a voltage controlled DC current source is coupled to the power switching apparatus. The erase head drive circuit is capable of operating at clock frequencies greater than 3.6 MHz.
摘要翻译： 用于小型化盒式磁带驱动器的串联谐振AC擦除磁头驱动电路装置包括用于产生非重叠脉冲波形并用于驱动开关，电源开关和电压控制DC电流源的装置。 脉冲形式发生和电源开关驱动装置包括耦合到外部提供的时钟频率信号的时钟频率输入和耦合到外部提供的使能信号的使能输入，并且包括多个电源开关驱动输出。 电源开关驱动输出提供包括非重叠间隔的多个电源开关控制信号。 功率开关耦合到脉冲形式发生器和电源开关驱动装置，用于响应于多个电源开关控制信号以AC方式将功率切换到擦除头，以允许电流在第一方向上流过擦除头 在第一时间间隔中，在第二时间间隔的第二相反方向上，以便在非重叠间隔期间防止电流流过擦除头。 电力开关装置包括串联谐振H桥电路。 用于提供压控DC电流源的装置耦合到电力开关装置。 擦除磁头驱动电路能够在大于3.6MHz的时钟频率下工作。
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公开(公告)号：US4791643A
公开(公告)日：1988-12-13
申请号：US947409
申请日：1986-12-29
CPC分类号： H03M13/31 , G11B20/1809 , H03M13/05
摘要： An error correcting method for use with a continuous serialized stream of digital information, such as present with digitized stereo audio signals, in which data is formatted in frames containing a preselected number of data words, parity words which in combination with data words of other frames enable correction of data in yet other, spatially remote frames, error check words from which errors in any frame may be detected, and frame sync words, and wherein the parity words are encoded from three orthogonal data sets having in common a single data word so that that word can be reconstructed by operating on any of the three sets, thus enabling correction of that word even if one or two of the three sets also contains an error.
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公开(公告)号：US07595950B2
公开(公告)日：2009-09-29
申请号：US11391574
申请日：2006-03-27
申请人： Larold L. Olson , Brian D. Findlay , C. Thomas Jennings , Douglas W. Johnson , Denis J. Langlois , Richard W. Molstad
发明人： Larold L. Olson , Brian D. Findlay , C. Thomas Jennings , Douglas W. Johnson , Denis J. Langlois , Richard W. Molstad
IPC分类号： G11B5/09
CPC分类号： G11B5/00813 , G11B5/86 , G11B20/1201 , G11B20/1833 , G11B2220/232 , G11B2220/90
摘要： In an embodiment, a data storage tape includes a first side including recorded data and a second side including recorded error correcting code data for the recorded data on the first side. In another embodiment, a data storage tape comprises a first side including recorded data and a second side including a copy of the recorded data. Embodiments of the invention may distribute related data across both sides of a data storage tape and as a result may reduce the probability that a location-dependent error in the data storage tape will result in irretrievable data loss. Embodiments of the invention may be particularly useful for systems that can simultaneously retrieve or record data on both sides of a dual-sided data storage tape.
摘要翻译： 在一个实施例中，数据存储带包括包括记录数据的第一侧和包括第一侧上记录数据的记录纠错码数据的第二侧。 在另一个实施例中，数据存储带包括包括记录数据的第一侧和包括记录数据的副本的第二侧。 本发明的实施例可以在数据存储磁带的两侧分布相关数据，并且因此可能降低数据存储磁带中与位置相关的错误将导致不可恢复的数据丢失的可能性。 本发明的实施例对于能够同时在双面数据存储带的两侧检索或记录数据的系统可能特别有用。
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公开(公告)号：US07495859B2
公开(公告)日：2009-02-24
申请号：US11708762
申请日：2007-02-20
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： In general, the invention is directed to servo techniques that utilize servo patterns to facilitate head positioning relative to the data tracks. For example, the servo techniques may include a first series of servo patterns configured to allow calculation of a position error signal that substantially mitigates error resulting from a variation in velocity of the data storage tape during detection of the at least one of the servo patterns in the first series. The servo techniques may also include a second series of servo patterns interleaved within the first series of servo patterns in order to encode data. The encoded data may include linear position information. Embodiments may allow a data storage tape meeting a currently accepted data storage tape specification, e.g., an LTO Ultrium specification, to record data in a higher density than currently implemented with the specification.
摘要翻译： 通常，本发明涉及利用伺服模式以便于相对于数据轨道进行头部定位的伺服技术。 例如，伺服技术可以包括第一系列伺服模式，所述第一系列伺服模式被配置为允许计算位置误差信号，所述位置误差信号基本上减轻在检测到所述伺服模式中的至少一个伺服模式期间数据存储带的速度变化导致的误差 第一个系列。 伺服技术还可以包括在第一系列伺服模式中交错的第二系列伺服模式，以便对数据进行编码。 编码数据可以包括线性位置信息。 实施例可以允许满足当前接受的数据存储磁带规范（例如LTO Ultrium规范）的数据存储磁带以比当前在说明书中实现的密度更高的密度记录数据。
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公开(公告)号：US07204446B2
公开(公告)日：2007-04-17
申请号：US10914032
申请日：2004-08-05
IPC分类号： G03B23/02
CPC分类号： G11B15/605
摘要： The invention is directed to arrangements of tapered data storage tape guides which can improve the guiding of data storage tape. Tapered data storage tape guides having specific sizes relative to the data storage tape are also disclosed. The tapered data storage tape guides and arrangements of tapered guides can improve the ability to properly guide the data storage tape, e.g., during media fabrication, servo recording or readout, data recording or data readout. In one embodiment, a data storage tape guiding system may include a first tapered guide and a second tapered guide. The taper in the first guide can be opposite the taper in the second guide such that the data storage tape is forced against an upper flange of the first guide and forced against a lower flange of the second guide, or vice versa.
摘要翻译： 本发明涉及锥形数据存储带引导件的布置，其可以改进数据存储带的引导。 还公开了相对于数据存储带具有特定尺寸的锥形数据存储磁带引导件。 锥形数据存储带引导件和锥形引导件的布置可以提高例如在介质制造，伺服记录或读出，数据记录或数据读出期间适当引导数据存储带的能力。 在一个实施例中，数据存储带引导系统可以包括第一锥形引导件和第二锥形引导件。 第一引导件中的锥度可以与第二引导件中的锥度相反，使得数据存储带被迫抵抗第一引导件的上凸缘并且被迫抵靠第二引导件的下凸缘，反之亦然。
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