公开(公告)号：US3780312A

公开(公告)日：1973-12-18

申请号：US3780312D

申请日：1971-12-30

Applicant: IBM

Inventor： LIN Y ,  YAO Y

IPC: H03K19/168 ,  G11C11/14

CPC classification number: H03K19/168

Abstract: A threshold logic device is provided using magnetic bubble domains. The presence and absence of bubble domains are the logic inputs to the device and the logic gate itself is comprised of a plurality of series connected sensing elements. Magnetoresistive sensing devices are particularly suitable. Each sensing element is given a particular geometry or thickness in order to achieve weighting of the logic inputs. The threshold of the device is internal in an associated detector and can be varied by changing the measuring current through the sensing elements in the case of magnetoresistive sensing elements. Depending on the sum of the weighted inputs being at least equal to the threshold value, or less than this value, the binary output of the device will be one or zero, respectively.

Abstract translation: 使用磁性气泡域提供阈值逻辑器件。 气泡区域的存在和不存在是器件的逻辑输入，逻辑门本身由多个串联连接的感测元件组成。 磁阻感测装置是特别合适的。 给每个传感元件一个特定的几何形状或厚度，以实现逻辑输入的加权。 器件的阈值在相关的检测器内部，并且可以通过在磁阻感测元件的情况下改变通过感测元件的测量电流来改变。 根据加权输入的总和至少等于阈值或小于该值，设备的二进制输出将分别为1或0。

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

IPC: G11C11/14 ,  G01R33/09 ,  G11B5/02 ,  G11B5/39 ,  G01R33/02

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.

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

Inventor： ALMASI G ,  KEEFE G ,  LIN Y

IPC: G01R33/09 ,  G11C19/08 ,  G11C11/14 ,  G11C19/00

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。

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

Inventor： LIN Y ,  KEEFE G ,  ALMASI G

IPC: G01R33/09 ,  G11C19/08

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.