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    Semicircular magnetic domain propagation apparatus
    1.
    发明授权
    Semicircular magnetic domain propagation apparatus 失效
    半圆磁场传播装置

    公开(公告)号：US3906468A

    公开(公告)日：1975-09-16

    申请号：US47395274

    申请日：1974-05-28

    Applicant: IBM

    Inventor： VOEGELI OTTO

    IPC: G11C11/14 ,  G11C19/08 ,  H01F41/14

    CPC classification number: H01F41/14 ,  G11C19/0833

    Abstract: Semicircular magnetic domains are propagated along a narrow track. Magnetostatic interaction prevents two domains from being situated directly opposite each other on the track and thus binary data storage can occur using bubble presence on the sides of the track as 1''s or 0''s. A shift register can comprise a pair of domain generators, the propagation track with or without propagating means and a pair of sensors and annihilators, one of the domain generators, sensors and annihilators being located on each side of the track. A loop store may comprise tracks formed on the circumference of a cylinder of the domain medium. The track can be formed by a physical separation in the domain medium, such as a physical crack scribed by a laser beam or by ion-milling grooves. The track can also be defined by a narrow region with in-plane anisotropy formed by ion implantation.

    Abstract translation: 半圆磁畴沿窄轨传播。 静电相互作用防止两个区域在轨道上彼此直接相对定位，因此二进制数据存储可以使用轨道边缘上的气泡存在为1或0来进行。 移位寄存器可以包括一对域发生器，具有或不具有传播装置的传播轨迹和一对传感器和湮灭器，位于轨道的每一侧的域发生器，传感器和歼灭者之一。 环路存储器可以包括形成在域介质的圆柱体的圆周上的轨道。 轨道可以通过在介质中的物理分离形成，例如由激光束刻划的物理裂纹或通过离子铣削槽。 轨道也可以由具有通过离子注入形成的面内各向异性的窄区域限定。

    Bubble domain lattice buffer arrangement
    3.
    发明授权
    Bubble domain lattice buffer arrangement 失效
    气泡域格子缓冲器布置

    公开(公告)号：US3930244A

    公开(公告)日：1975-12-30

    申请号：US49494074

    申请日：1974-08-05

    Applicant: IBM

    Inventor： VOEGELI OTTO

    IPC: G11C11/14 ,  G11C19/08

    CPC classification number: G11C19/0858 ,  G11C19/0833 ,  G11C19/0841

    Abstract: Bubble domains in an enclosed lattice are translated for data accessing and buffered by providing stripe domains on both ends of a bubble lattice parallel to the direction of the bubble domain propagation. The stripe domains elongate at one end and contract at the other end in the positioning of a column of information carrying bubble domains into a column accessing device. Current in conductors at each end of the lattice and/or in propagation conductors near the column accessing devices change the shape of the stripe arrays so that the interposed bubble lattice is propagated while maintaining lattice integrity. Any one or all of the rows of bubble domains in the lattice file can be translated to position information carrying bubble domains for column accessing.

    Abstract translation: 翻译用于数据访问和缓冲的封闭晶格中的气泡域，通过在与气泡域传播方向平行的气泡晶格的两端提供条带域。 条带域在一端延伸并且在将气泡域的一列信息定位到列访问装置中的另一端收缩。 在栅格的每一端和/或靠近列访问器件的传播导体中的导体中的电流改变条形阵列的形状，使得插入的气泡晶格在保持晶格完整性的同时传播。 点阵文件中的任何一个或全部气泡域的行可被转换为携带用于列访问的气泡域的位置信息。

    Magnetoresistive read head assembly having matched elements for common mode rejection
    5.
    发明授权
    Magnetoresistive read head assembly having matched elements for common mode rejection 失效
    具有共同模式拒绝的匹配元素的磁电读头组件

    公开(公告)号：US3860965A

    公开(公告)日：1975-01-14

    申请号：US40370473

    申请日：1973-10-04

    Applicant: IBM

    Inventor： VOEGELI OTTO

    IPC: G01D5/18 ,  G01D5/245 ,  G01R33/09 ,  G07D7/00 ,  G07D7/08 ,  G11B5/39 ,  G11B23/00 ,  G11B5/30

    CPC classification number: G11B5/3954 ,  G11B5/399 ,  G11B23/0007

    Abstract: A magnetic read head assembly comprises two magnetostatically coupled magnetoresistive (MR) elements, and conducting means for supplying a drive current to the elements. The drive current serves as a sense current as well as a bias current. The drive current is provided to both elements concurrently, so that the current through each element serves to magnetically bias the other element. An output differential read signal is obtained from the two MR elements.

    Abstract translation: 磁读头组件包括两个静磁耦合磁阻（MR）元件，以及用于向元件提供驱动电流的导电装置。 驱动电流用作感测电流以及偏置电流。 驱动电流同时提供给两个元件，使得通过每个元件的电流用于磁偏置另一元件。 从两个MR元件获得输出差分读取信号。

    RETURN-TO-ZERO MAGNETIC RECORDING SYSTEM
    10.
    发明专利
    RETURN-TO-ZERO MAGNETIC RECORDING SYSTEM 未知

    公开(公告)号：CA1253618A

    公开(公告)日：1989-05-02

    申请号：CA513651

    申请日：1986-07-11

    Applicant: IBM

    Inventor： VOEGELI OTTO

    IPC: G11B5/00

    Abstract: RETURN TO ZERO VERTICAL MAGNETIC RECORDING SYSTEM An return-to-zero (RZ) vertical digital magnetic recording method and apparatus comprising a selectively magnetizable recording medium which includes a recording layer of magnetic material having a low vertical remanence. A magnetic recording head is positioned in close proximity to the recording medium, and relative motion is produced between the recording medium and the recording head. To record data, the recording head is energized with one short duration current pulse for each unit of data to be recorded. The resulting bipolar magnetic write field closes substantially perpendicular through the recording medium thereby producing, in the medium, a similarly bipolar flux configuration having the magnetic transition centered about the gap of the magnetic recording head. Data is represented by the transition in RZ vertical magnetic recording. SA984009

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