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543 条记录 (耗时 0.028 秒)

    Digital servo track format with leading and trailing identifiers
    1.
    发明授权
    Digital servo track format with leading and trailing identifiers 失效
    数字伺服轨迹格式，带有前导标识符和尾随标识符

    公开(公告)号：US6124993A

    公开(公告)日：2000-09-26

    申请号：US246805

    申请日：1994-05-20

    申请人： Kurt F. Hallamasek

    发明人： Kurt F. Hallamasek

    IPC分类号： G11B5/008 ,  G11B5/584 ,  G11B5/588 ,  G11B15/08 ,  G11B15/087 ,  G11B15/665 ,  G11B15/68 ,  G11B20/12 ,  G11B27/32 ,  G11B5/09

    CPC分类号： G11B5/0086 ,  G11B15/08 ,  G11B15/087 ,  G11B15/6653 ,  G11B15/689 ,  G11B20/1209 ,  G11B27/322 ,  G11B5/00813 ,  G11B5/584 ,  G11B5/588

    摘要： A digital servo track pattern for a magnetic medium which can be recorded and reproduced by a recording and reproducing system. The servo track pattern has a plurality of digital mark patterns recorded thereon, each of said digital mark patterns having a leading identifier field of digital bits, a trailing identifier field of digital bits and a field of digital synchronizing data located between said leading and trailing identifier fields. The leading identifier field of digital bits is electrically equivalent during reproducing while the medium is moving in a first direction to the trailing identifier field of digital bits while the medium is moving in a direction opposite to said first direction.

    摘要翻译： 一种用于磁介质的数字伺服磁道图案，其可由记录和再现系统记录和再现。 伺服轨迹图案上记录有多个数字标记图案，每个所述数字标记图案具有数字位的前导标识符字段，数字位的尾部标识符字段和位于所述前导标识符和尾部标识符之间的数字同步数据字段 领域。 当介质沿着与所述第一方向相反的方向移动时，数字位的前导标识符字段在再现期间是电等效的，同时介质沿着第一方向移动到数字位的尾部标识符字段。

    Hybrid arm-position/tape-tension servocontrol system
    3.
    发明授权
    Hybrid arm-position/tape-tension servocontrol system 失效
    混合臂位置/带张力伺服控制系统

    公开(公告)号：US5836533A

    公开(公告)日：1998-11-17

    申请号：US740674

    申请日：1996-10-31

    申请人： Kurt F. Hallamasek

    发明人： Kurt F. Hallamasek

    IPC分类号： G11B15/43 ,  G11B15/665

    CPC分类号： G11B15/6653 ,  G11B15/43

    摘要： Servomechanisms (58 and 60) control a takeup reel (12) and a tension arm (16) in a cassette recorder. The servomechanisms receive control signals (54 and 56) generated in accordance with respective control functions, each of which includes a respective constituent function of the difference between a commanded tension-arm position and a measured tension-arm position. In a position of the tension arm that prevails at the beginning of tape threading the constituent of the tension-arm control function that depends on this arm-position error is a relatively large contribution and gradually decreases to zero as the tension arm moves to the position that it assumes for normal recording and playback. During the same time, the the constituent of the reel-control function that depends on arm-position error begins at zero and gradually increases. Such a gradual transfer of position-error-based control suppresses tape-tension transients that would otherwise result.

    摘要翻译： 伺服机构（58和60）控制收录卷轴（12）和卡式录音机中的张力臂（16）。 伺服机构接收根据各自的控制功能生成的控制信号（54和56），每个控制功能包括指令的张力臂位置和测量的张力臂位置之间的差的各自组成函数。 在张带开始处的张力臂的位置，依赖于该臂位置误差的张力臂控制功能的构成是相对较大的贡献，并且随着张力臂移动到位置而逐渐减小到零 它假定为正常的录制和播放。 在同一时间，取决于手臂位置误差的卷轴控制功能的成分从零开始逐渐增加。 这种基于位置误差的控制的逐渐转移抑制了否则会导致的带张力瞬变。

    Magnetic core with field confinement structure
    5.
    发明授权
    Magnetic core with field confinement structure 失效
    具有磁场约束结构的磁芯

    公开(公告)号：US5717552A

    公开(公告)日：1998-02-10

    申请号：US709800

    申请日：1996-09-10

    申请人： George R. Varian

    发明人： George R. Varian

    IPC分类号： G11B5/00 ,  G11B5/11 ,  G11B5/31 ,  G11B5/39 ,  H01F27/36 ,  G11B5/127

    CPC分类号： G11B5/39 ,  G11B5/11 ,  G11B5/313 ,  G11B5/3143 ,  H01F27/367 ,  G11B2005/0002

    摘要： An improved, shielded magnetic core structure is disclosed that is particularly well suited for use in magnetic read and write heads adapted for narrow track, short wavelength magnetic recording systems, and for transformers of high performance, wide band application. The improved magnetic cores use novel field confinement structures to reduce or eliminate leakage magnetic paths which normally do not link the head gap or do not link the transformer windings. This shielding arrangement substantially improves the performance of such devices, as compared to conventional, unshielded heads and transformers. Embodiments involving toroidal cores, thin film heads, and MR heads are disclosed, along with high performance, wide band transformer structures.

    摘要翻译： 公开了一种改进的屏蔽磁芯结构，其特别适用于适用于窄轨，短波长磁记录系统的磁读写头和用于高性能，宽带应用的变压器。 改进的磁芯使用新颖的场约束结构来减少或消除通常不链接磁头间隙或不连接变压器绕组的泄漏磁路。 与常规的非屏蔽磁头和变压器相比，该屏蔽装置显着地改善了这种装置的性能。 公开了涉及环形磁芯，薄膜磁头和MR磁头的实施例，以及高性能的宽带变压器结构。

    Pipelined viterbi decoder
    6.
    发明授权
    Pipelined viterbi decoder 失效
    流水线维特比解码器

    公开(公告)号：US5410556A

    公开(公告)日：1995-04-25

    申请号：US146365

    申请日：1993-10-29

    申请人： Nan-Hsiung Yeh ,  Charles R. Olson

    发明人： Nan-Hsiung Yeh ,  Charles R. Olson

    IPC分类号： G06F11/10 ,  G11B20/10 ,  G11B20/18 ,  H03M13/23 ,  H03M13/41 ,  H04B3/06 ,  H03M13/12

    CPC分类号： H03M13/6343 ,  H03M13/41

    摘要： A pipelined Viterbi decoder includes a plurality of circuit stages and a synchronous clocking arrangement for controlling the operations of the circuits within each stage. Specifically, an input stage converts multi-level input signals into streams of even and odd digital data samples. A parallel-precomputation stage adaptively establishes a threshold range for each sample, while a sequence detection stage designates one of the multiple levels for that sample and then determines the validity of that designation. Validity is determined in accordance with the sequence property of alternate samples in multi-level coding. Violations of the sequence property are corrected by a sequence correction stage so that valid, coded data and clock signals are provided at the outputs of the decoder.

    摘要翻译： 流水线维特比解码器包括多个电路级和用于控制每个级内的电路的操作的同步计时装置。 具体地，输入级将多电平输入信号转换成偶数和奇数数字数据样本的流。 并行预计算阶段自适应地建立每个样本的阈值范围，而序列检测阶段指定该样本的多个级别之一，然后确定该指定的有效性。 根据多级编码中的替代样本的序列性质确定有效性。 通过序列校正级来校正对序列特性的违反，从而在解码器的输出处提供有效的编码数据和时钟信号。

    Scanning transducer having transverse information and control flux paths for reduced interference between fluxes
    8.
    发明授权
    Scanning transducer having transverse information and control flux paths for reduced interference between fluxes 失效
    具有横向信息和控制磁通路径的扫描传感器，以减少通量之间的干扰

    公开(公告)号：US5227939A

    公开(公告)日：1993-07-13

    申请号：US31713

    申请日：1987-03-27

    申请人： Beverley R. Gooch

    发明人： Beverley R. Gooch

    IPC分类号： G01R33/00 ,  G11B5/00 ,  G11B5/127 ,  G11B5/187 ,  G11B5/245 ,  G11B5/49 ,  G11B5/53 ,  G11B5/588

    CPC分类号： G11B5/00 ,  G01R33/00 ,  G11B5/127 ,  G11B5/187 ,  G11B5/245 ,  G11B5/2452 ,  G11B5/4907 ,  G11B5/4969 ,  G11B5/53 ,  G11B5/588

    摘要： A preferred embodiment of an electromagnetically controlled scanning magnetic transducer is described having two confronting core poles defining a physical transducing gap therebetween. A control winding is associated with each core pole. A control current applied to each control winding selectively saturates a portion of each core pole facing a record medium. Each saturated face portion defines an adjacent unsaturated highly permeable face portion. The highly permeable face portions of each core pole overlap across the gap to define a transducing zone. The information signal and control windings are arranged relative to one another to obtain information signal and control flux paths extending perpendicular to one another.

    摘要翻译： 描述了一种电磁控制的扫描磁换能器的优选实施例，其具有在它们之间限定物理换能间隙的两个相对的芯极。 控制绕组与每个磁芯相连。 施加到每个控制绕组的控制电流选择性地使面对记录介质的每个芯极的一部分饱和。 每个饱和面部分限定相邻的不可渗透的面部部分。 每个芯柱的高度可渗透的面部分跨越间隙重叠以限定换能区。 信息信号和控制绕组相对于彼此布置以获得彼此垂直延伸的信息信号和控制磁通路径。