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

Inventor： KEEFE G ,  ALMASI G ,  HENDEL R

IPC: G11C11/14 ,  G01R33/12 ,  G11C19/08 ,  G11C19/00

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。

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

Inventor： HENDEL R ,  JAMBA T ,  KEEFE G ,  ROSIER L

IPC: G11C11/14 ,  G11C19/08

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。