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公开(公告)号：US3858188A
公开(公告)日：1974-12-31
申请号：US26784272
申请日：1972-06-30
Applicant: IBM
Inventor： KEEFE G
CPC classification number: H03M7/002 , G11C19/0883
Abstract: A multiphase bubble domain decoder having significantly reduced interconnections and requiring a minimum of drivers. Bubble domains are steered in various channels rather than being inhibited in their propagation, thereby leading to reduced power consumption. Decoding is achieved using magnetic overlays and current carrying conductors to provide a steering magnetic field for propagation of domains in selected paths. Domains propagate in accordance with a series of attractive magnetic poles established by the magnetic overlays in response to a reorienting magnetic field in the plane of the magnetic sheet in which the domains exist. Current pulses in the conductors occur at times corresponding to various orientations of the reorienting magnetic field, rather than at only one orientation of the reorienting field as was done in the prior art. This decoder can be used to write information into any one of a number of storage locations and read out information from any one of these storage locations.
Abstract translation: 多相气泡域解码器具有明显减少的互连并且需要最小的驱动器。 气泡域在各种通道中被引导，而不是在其传播中被抑制，从而导致功率消耗的降低。 使用磁覆盖层和载流导体来实现译码，以提供用于在选定路径中传播域的转向磁场。 磁畴响应磁畴中存在磁性层的平面上的重新取向磁场，由磁性层叠构成的一系列有吸引力的磁极传播。 导体中的电流脉冲发生在对应于重新定向磁场的各种取向的时间，而不是如现有技术中那样仅在重新定向场的一个取向上。 该解码器可用于将信息写入多个存储位置中的任何一个并从这些存储位置中的任一个读出信息。
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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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5.发明授权
公开(公告)号：US3858189A
公开(公告)日：1974-12-31
申请号：US31940872
申请日：1972-12-29
Applicant: IBM
Inventor： WALKER E , BEAUSOLEIL W , KEEFE G
CPC classification number: G11C19/0866 , G01R33/09
Abstract: A plurality of magneto-resistive sensing elements are connected in series and positioned adjacent magnetic bubble domain propagation paths in a compressor circuit. If a data representing bubble is injected into the beginning of the circuit, each bubble already present is forced over to the next idler position. As the bubbles pass the sensing elements their magnetization vectors are rotated producing corresponding changes in the resistance values of the sensors, which may be easily detected as a large magnitude signal indicating the presence of a data bubble.
Abstract translation: 多个磁阻感测元件串联连接并定位在压缩机电路中的与气泡扩散路径相邻的位置。 如果将表示气泡的数据注入到电路的开始处，则已经存在的每个气泡被迫过渡到下一个惰轮位置。 当气泡通过感测元件时，它们的磁化矢量被旋转，从而产生传感器的电阻值的相应变化，这可以容易地被检测为指示数据气泡存在的大幅度信号。
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Patent Agency Ranking
公开(公告)号：US3825885A
公开(公告)日：1974-07-23
申请号：US26675872
申请日：1972-06-27
Applicant: IBM
CPC classification number: G11C19/0816 , G11C19/0875
Abstract: A structure for increasing the reliability of a magnetic bubble domain memory system in which the operating margins of various components within the system are enlarged so that the margins of the components will have a larger area of overlap. For components in which a lessening of the effect of the bias field Hz is desirable (splitters, generators, corner propagation elements, etc.), a thin layer of magnetically soft material (for instance, permalloy) is provided which extends over the area of the magnetic sheet in which the component function takes place. This thin layer is in addition to the overlay elements used to provide the function. In a memory system, selectively placed ''''thin patches'''' of permalloy or strips of permalloy are used in the critical component areas to improve operating margins of these components.
Abstract translation: 一种用于增加气泡域存储系统的可靠性的结构，其中系统内的各种部件的操作余量被扩大，使得部件的边缘将具有更大的重叠面积。 对于其中希望减小偏置场Hz的影响（分离器，发生器，拐角传播元件等）的部件，提供了薄的软磁材料（例如坡莫合金），其延伸在 发生组件功能的磁性片。 这个薄层是用于提供功能的叠加元素的补充。 在存储器系统中，在关键部件区域中使用选择性地放置坡莫合金或坡莫合金条的“薄贴片”以改善这些部件的操作裕度。
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7.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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公开(公告)号：CA939059A
公开(公告)日：1973-12-25
申请号：CA145366
申请日：1972-06-22
Applicant: IBM
Inventor： KEEFE G , CHANG HSU , ROSIER L , LIN YEONG S
Abstract: A decoder for cylindrical magnetic domain shift registers having means to clear the information from selected registers thus enabling new information to be written into those registers. The decoder is incorporated into 2N closed loop shift registers and uses only a small part of the storage area of the magnetic sheet in which domains exist. It is activated by 2N control lines (N pairs). Depending upon the activation of the decoder, the information in a selected shift register is passed to a clear means which sends it into one of two paths depending upon the activation of the clear means. One path brings the information to a detector for destructive readout, while the other path brings the information to a domain splitter. The domain splitter splits the input domains into two parts, one of which propagates to the detector while the other returns to the proper shift register. Thus, non-destructive readout (NDRO) or destructive read-out (DRO) is provided depending upon the activation of the clear means.
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公开(公告)号：SE321706B
公开(公告)日：1970-03-16
申请号：SE10465
申请日：1965-01-07
Applicant: IBM
Inventor： KEEFE G , MIDDELHOEK S
Abstract: 1,069,529. Magnetic storage devices. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 21, 1964 [Jan. 7, 1964], No. 51757/64. Heading H1T. [Also in Division H3] Information is written into an anisotropic magnetic film structure (which may be a single film or multiple single domain films side-by-side with or without air gap) by applying a hard direction field or fields and an over-lapping easy direction field to the film structure, the hard direction field or fields being varied or terminated in such a way that a portion (domain) only of the film structure becomes magnetized in a given direction, an adjacent portion or portions being magnetized in the opposite direction. Fig. 6 shows a matrix in which, e.g., the single magnetic film 10.7 is subjected to hard direction fields by a pulse in line 20.1 and an overlapping longer lasting pulse in line 22.1, a coincident easy direction bit pulse in line 16.1 terminating after the termination of the hard direction pulse in line 20.1 so that the magnetic vector in the part of the film under line 20.1 is swung into a direction along the easy axis determined by the bit pulse in 16.1. The hard direction pulse in line 22.1 terminates after cessation of the bit pulse and the magnetic vector in the portion of the film under line 22.1 is said to assume a direction along the easy axis opposite to that of the magnetic vector in the part of the film under 20.1 (Fig. 2, not shown). Magnetic films which demagnetize, after application of hard direction field, into four or more domains may be used, the word conductors over alternate domains being connected serially. Non-destructive readout is obtained by passing an interrogating pulse through one of the word conductors 20.1 or 22.1. In another arrangement (Figs. 7 and 8, not shown) a single word conductor (18a) passing over the centre part of the part of the film applies a large hard direction field which saturates the whole film in the hard direction. This field is reduced while an easy direction field is applied by a bit conductor (16) so that in the areas of the film on each side of conductor (18a) the magnetization vectors turn towards a first easy axis direction determined by the direction of the bit field. With further reduction and removal of the hard direction field the magnetization vector in the part of the film below conductor (18a) is said to assume a direction along the easy axis opposite to the first direction. The word line may be slotted.
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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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