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公开(公告)号：US3811119A
公开(公告)日：1974-05-14
申请号：US31981772
申请日：1972-12-29
Applicant: IBM
CPC classification number: G11C19/0858
Abstract: By suitably pulsing a coil overlying a magnetic film or platelet in which magnetic bubble domains exist, the domains within the coil reverse their magnetization vectors with respect to bubble domains in the magnetic material outside of the coil, thus enabling the controlled generation of hollow bubbles.
Abstract translation: 通过适当地脉冲覆盖存在磁性气泡畴的磁性膜或血小板的线圈，线圈内的磁畴相对于线圈外部的磁性材料中的气泡畴的磁化矢量反转，从而能够控制产生中空气泡。
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公开(公告)号：US3815107A
公开(公告)日：1974-06-04
申请号：US15849471
申请日：1971-06-30
Applicant: IBM
Inventor： ALMASI G
CPC classification number: G09G3/00
Abstract: A flat display system using cylindrical magnetic domains existing within a magnetic sheet, such as orthoferrite or garnet. Located on the magnetic sheet is a propagation means corresponding to a horizontal shift register and a plurality of vertical shift registers for transferring the content of the horizontal shift register in a direction transverse to the data flow in the horizontal shift register. The vertical shift registers are terminated with domain collapsers. The domain generator supplies domains serially into the horizontal shift register in accordance with an applied data signal. When fully loaded, the contents of the horizontal register are shifted in parallel by the vertical registers. This continues until the entire pattern is on the magnetic sheet, after which the sheet is illuminated by incident polarized light. An analyzer is used to differentiate light which passes through a domain from that which does not pass through a domain. Consequently, an image corresponding to the stored domain pattern is viewed. Commercial TV applications are possible.
Abstract translation: 使用存在于磁性片内的圆柱形磁畴的平面显示系统，例如正铁或石榴石。 位于磁片上的是对应于水平移位寄存器和多个垂直移位寄存器的传播装置，用于沿横向于水平移位寄存器中的数据流的方向传送水平移位寄存器的内容。 垂直移位寄存器由域崩溃器终止。 域生成器根据应用的数据信号将域串联地提供到水平移位寄存器中。 当满载时，水平寄存器的内容由垂直寄存器并行移位。 这一直到整个图案都在磁性片上，之后片材被入射的偏振光照亮。 分析仪用于区分通过域的光不通过域的光。 因此，查看与存储的域模式对应的图像。 商业电视应用是可能的。
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公开(公告)号：US3750154A
公开(公告)日：1973-07-31
申请号：US3750154D
申请日：1972-05-01
Applicant: IBM
Inventor： ALMASI G
CPC classification number: G11C19/0875
Abstract: A space displacement arrangement of magnetic domain chips with respect to each other, which allows packaging with a minimum number of memory interconnections and low operating power. In addition, reduction of the number of preamplifiers and the number of sensors is achieved. Each chip contains bubble domain devices thereon, and provides a complete bubble domain memory system. Spatially rotating the chips with respect to one another means that the same reorienting magnetic drive field will have a time displaced effect on each of the chips. That is, each chip will see the reorienting drive field at a different time. In this manner, multiplexing on a chip-to-chip basis is achieved. The chips can be arranged so that no interconnection cross-overs result, even though they are rotationally displaced with respect to one another.
Abstract translation: 磁畴芯片相对于彼此的空间位移布置，其允许以最小数量的存储器互连和低工作功率的封装。 此外，实现了前置放大器的数量的减少和传感器的数量。 每个芯片在其上包含气泡域设备，并提供完整的气泡域存储系统。 相对于彼此间歇地旋转芯片意味着相同的重定向磁驱动场将对每个芯片具有时间偏移效应。 也就是说，每个芯片将在不同的时间看到重新定向的驱动器场。 以这种方式，实现了基于芯片到芯片的复用。 芯片可以布置成使得即使它们相对于彼此旋转地移位也不会导致互连交叉。
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4.发明授权
公开(公告)号：US3716781A
公开(公告)日：1973-02-13
申请号：US3716781D
申请日：1971-10-26
Applicant: IBM
Inventor： ALMASI G , KEEFE G , LIN Y , THOMPSON D
CPC classification number: G11B5/3903 , G01R33/09
Abstract: A MAGNETORESISTIVE SENSING DEVICE FOR DETECTION OF MAGNETIC FLUX, COMPRISING A MAGNETORESISTIVE SENSING ELEMENT IN WHICH THE SHAPE ANISOTROPY FIELD IS SUBSTANTIALLY PERPENDICULAR TO THE UNIAXIAL ANISOTROPY FIELD. THE LARGER OF THESE TOW MAGNETIC FIELDS IS IN A DIRECTION WHICH IS SUBSTANTIALLY NORMAL TO THE DIRECTION OF THE SIGNAL FLUX WHICH IS TO BE DETECTED, TO INSURE THAT THE MAGNETIZATION VECTOR OF THE SENSING ELEMENT WILL RETURN TO ITS REST STATE WHEN THE SIGNAL MAGNETIC FLUX IS REMOVED. THE EASY AXIS OF THE SENSING ELEMENT CAN BE EITHER PARALLEL OR NORMAL TO THE SIGNAL MAGNETIC FIELD DIRECTION. CURRENT THROUGH THE SENSING ELEMTN IS PREFERABLY PROVIDED BY A CONSTANT CURRENT SOURCE CONNECTED TO THE ELEMENT. THE DIRECTION OF CURRENT THROUGH THE ELEMENT CAN BE EITHER ALONG THE DIRECTION OF THE QUIESCENT MAGNETIZATION STATE OR PERPENDICULAR TO IT. APPLICATIONS INCLUDE MAGNETIC BUBBLE DOMAIN SENSING AND SENSING OF STORED MAGNETIC SIGNALS ON DISKS OR TAPES.
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Patent Agency Ranking
公开(公告)号：US3792451A
公开(公告)日：1974-02-12
申请号：US3792451D
申请日：1970-11-16
Applicant: IBM
CPC classification number: G01R33/09 , G11C19/0858 , G11C19/0866
Abstract: A magneto-resistive sensing technique for detection of very small single-wall magnetic domains. An apparatus is provided in which magneto-resistive sensing elements are located on a magnetic material capable of supporting single-wall magnetic domains (bubble domains). Since very small bubble domains have only small amounts of magnetic flux associated with them, a transverse magnetic bias field is used to move the operation of each sensing element into a linear region to maximize the sensor''s incremental resistance change for a given change in flux. This transverse bias field is derived from the applied magnetic field used to propagate the bubble domains or from the stabilizing field used to stabilize the domains, thereby eliminating the need for an auxiliary bias field. In order to use the applied propagation and bias fields, the sensing elements are precisely located with respect to the propagation means, and have particular orientations.
Abstract translation: 用于检测非常小的单壁磁畴的磁阻检测技术。 提供了一种装置，其中磁阻感测元件位于能够支撑单壁磁畴（气泡畴）的磁性材料上。 由于非常小的气泡区域仅具有与其相关联的少量磁通量，所以使用横向磁偏置场将每个感测元件的操作移动到线性区域中，以使给定通量变化的传感器的增量电阻变化最大化。 该横向偏置场源自用于传播气泡域的施加磁场或用于稳定畴的稳定场，从而不需要辅助偏置场。 为了使用所施加的传播和偏移场，感测元件相对于传播装置精确地定位，并且具有特定的取向。
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公开(公告)号：US3781832A
公开(公告)日：1973-12-25
申请号：US3781832D
申请日：1971-12-20
Applicant: IBM
CPC classification number: G11C19/0866 , G01R33/1207
Abstract: An improved magnetoresistive sensing device for detection of cylindrical magnetic domains (bubble domains) in which the domains are expanded before being sensed. The sensing element is magnetically soft material, such as permalloy, located in fluxcoupling proximity to bubble domains which exist in a magnetic sheet. Current through the sensing element aids in the bubble domain expansion and does not impede bubble domain motion even though it is of large magnitude. Due to the expansion, a greater output signal is achieved. The structure also is useful in providing bubble domain annihilation after sensing. This eliminates the usual time delay in moving the domain to an annihilator circuit for destruction and also eliminates the need for a separate annihilator circuit.
Abstract translation: 用于检测圆柱形磁畴（气泡畴）的改进的磁阻感测装置，其中在被感测之前这些畴被扩展。 感测元件是磁性软的材料，例如坡莫合金，位于与磁性片中存在的气泡区域的磁通耦合中。 通过感应元件的电流有助于气泡域膨胀，并且不会妨碍气泡域运动，即使它是大的量级。 由于扩展，实现了更大的输出信号。 该结构也可用于在感测后提供气泡域湮灭。 这消除了将域移动到湮没器电路以进行破坏的通常的时间延迟，并且也消除了对单独的湮灭器电路的需要。
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公开(公告)号：US3736419A
公开(公告)日：1973-05-29
申请号：US3736419D
申请日：1971-10-26
Applicant: IBM
CPC classification number: G01R33/1207 , G11C19/0866
Abstract: A magnetoresistive sensing device for detection of cylindrical magnetic domains (bubble domains) in magnetic bubble sheets. Cancellation of noise due to fields (such as the propagation (drive) field) which intercept the sensing element is achieved by using two magnetoresistive sensing elements whose combined voltage (or current) output is constant in the absence of a bubble domain. In one sensing element, the measuring current through the element is substantially parallel to the magnetization direction of that element, while in the second element, the measuring current is substantially perpendicular to the magnetization direction of the second element. In a preferred embodiment, two sensing elements are electrically connected in series and the sum of their resistances is constant when the device is being operated, in the absence of domains. When a domain is present, the sum of the resistances is different, so the output of the device changes. Each sensor can be associated with a different information channel (or group of channels) in which domains are propagated.
Abstract translation: 用于检测磁性气泡片中的圆柱形磁畴（气泡畴）的磁阻感测装置。 通过使用两个磁阻感测元件（其组合电压（或电流）输出在不存在气泡畴的情况下是恒定的）来实现拦截感测元件的场（例如传播（驱动）场）引起的噪声的消除。 在一个感测元件中，穿过元件的测量电流基本上平行于该元件的磁化方向，而在第二元件中，测量电流基本上垂直于第二元件的磁化方向。 在优选实施例中，两个感测元件串联电连接，并且在不存在畴的情况下，当器件被操作时，它们的电阻之和是恒定的。 当存在域时，电阻的总和不同，因此设备的输出发生变化。 每个传感器可以与其中传播域的不同信息信道（或信道组）相关联。
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公开(公告)号：US3729724A
公开(公告)日：1973-04-24
申请号：US3729724D
申请日：1971-06-08
Applicant: IBM
Inventor： AHEARN W , ALMASI G , GENOVESE E
CPC classification number: H01S3/1124 , G11B11/10 , G11C13/06 , G11C19/0866
Abstract: The presence and absence of cylindrical domains in a magnetic material is determined by using either the Faraday or Kerr effect in conjunction with two semiconductor lasers. When both lasers are biased just below their lasing thresholds, the magnetic material, in conjunction with the cylindrical domains, functions as a Q-switch wherein the cylindrical domains establish an optical cavity when they enter the optical path between the two lasers. When one laser is biased just below its lasing threshold and the other is biased in its lasing mode, the apparatus functions in a source-detector mode. The apparatus operating in either mode is very adaptable for multicell or array implementation.
Abstract translation: 通过使用法拉第或克尔效应与两个半导体激光器结合来确定磁性材料中圆柱形畴的存在和不存在。 当两个激光器偏压刚好低于它们的激光阈值时，与圆柱形畴结合的磁性材料用作Q开关，其中当它们进入两个激光器之间的光路时，圆柱形域建立光腔。 当一个激光器偏置刚好低于其激光阈值，另一个激光器以其激光模式偏置时，该器件在源检测器模式下起作用。 在任一模式下工作的设备非常适用于多单元或阵列实现。
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公开(公告)号：CA925206A
公开(公告)日：1973-04-24
申请号：CA126399
申请日：1971-10-29
Applicant: IBM
Abstract: A magneto-resistive sensing technique for detection of very small single-wall magnetic domains. An apparatus is provided in which magneto-resistive sensing elements are located on a magnetic material capable of supporting single-wall magnetic domains (bubble domains). Since very small bubble domains have only small amounts of magnetic flux associated with them, a transverse magnetic bias field is used to move the operation of each sensing element into a linear region to maximize the sensor's incremental resistance change for a given change in flux. This transverse bias field is derived from the applied magnetic field used to propagate the bubble domains or from the stabilizing field used to stabilize the domains, thereby eliminating the need for an auxiliary bias field. In order to use the applied propagation and bias fields, the sensing elements are precisely located with respect to the propagation means, and have particular orientations.
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