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    • 13. 发明申请
    • METHOD AND APPARATUS FOR INITIALIZING REFERENCE CELLS OF A TOGGLE SWITCHED MRAM DEVICE
    • 用于初始化切换MRAM器件的参考电池的方法和装置
    • US20080175043A1
    • 2008-07-24
    • US11624707
    • 2007-01-19
    • John K. DeBrosseMark C. H. Lamorey
    • John K. DeBrosseMark C. H. Lamorey
    • G11C11/00G11C7/00
    • G11C7/14G11C11/16G11C2207/2254
    • A method of determining an initial state of a reference cell in a fabricated memory array includes performing a first read operation of the reference cell by comparing current through the reference cell with the average current passing through a pair of data cells, and storing the result of the first read operation; inverting the value of one of the pair of the data cells; performing a second read operation of the reference cell, and storing the result of the second read operation; inverting the value of the other of the pair of the data cells; performing a third read operation of the reference cell, and storing the result of the third read operation. A majority compare operation of the results of the first, second and third operations is performed, wherein the result of the majority compare operation is the initial state of the reference cell.
    • 确定制造的存储器阵列中的参考单元的初始状态的方法包括通过将通过参考单元的电流与通过一对数据单元的平均电流进行比较来执行参考单元的第一读取操作,并且存储 第一次读取操作; 反转一对数据单元之一的值; 执行参考单元的第二读取操作,并存储第二读取操作的结果; 反转一对数据单元中的另一个的值; 执行参考单元的第三读取操作,并存储第三读取操作的结果。 执行第一,第二和第三操作的结果的多数比较操作,其中多数比较操作的结果是参考单元的初始状态。
    • 16. 发明授权
    • Four F-squared gapless dual layer bitline DRAM array architecture
    • 四个F平方无间隙双层位线DRAM阵列架构
    • US06282113B1
    • 2001-08-28
    • US09408349
    • 1999-09-29
    • John K. DeBrosse
    • John K. DeBrosse
    • G11C506
    • G11C5/063G11C7/18G11C11/4097Y10S257/907
    • A semiconductor device having a compact folded bitline architecture. Bitlines for a memory cell array arranged into bitline pairs constituting, when in use, a selected bitline and its complement. The selected bitline and its complement are adjacent in upper and lower levels, and exchange levels at selected breakpoints in the lower level bitline. The breakpoints are determined so as to establish a diagonally-oriented pattern of “twist regions” across the array. Adjacent bitline pairs exchange levels in alternating twist regions. The upper bitlines are positioned at a predetermined angle, relative to the lower bitlines, in selected intervals between the twist regions. The predetermined angle introduces an offset between the upper bitlines and their associated complement lower bitlines as the upper bitlines enter twist regions to exchange levels. The diagonal orientation of the twist regions, alternating pattern of breakpoints, and offsets eliminate gaps in the memory array which would otherwise be introduced in the twist regions, providing for enhanced cell density and a minimum cell area of approximately 4F2.
    • 具有紧凑折叠位线架构的半导体器件。 存储单元阵列的位线布置成位线对,在使用时构成选定的位线及其补码。 所选择的位线及其补码在上下位置相邻,并且在较低级别位线中的选定断点处的交换水平。 确定断点以便在整个阵列中建立“扭转区域”的对角线定向图案。 相邻的位线对交替扭转区域交换水平。 在扭转区域之间以选定的间隔相对于下位线将上位线定位在预定角度。 当上位线进入扭转区域以交换电平时,预定角度在上位线及其相关联的补码下位线之间引入偏移。 扭转区域的对角方向,断点的交替模式和偏移量消除了存储器阵列中的间隙,否则将在引导区域中引入,从而提供增强的单元密度和约4F2的最小单元面积。
    • 17. 发明授权
    • DRAM signal margin test method
    • DRAM信号余量测试方法
    • US5610867A
    • 1997-03-11
    • US535446
    • 1995-09-28
    • John K. DeBrosseToshiaki KirihataHing Wong
    • John K. DeBrosseToshiaki KirihataHing Wong
    • G11C11/401G11C11/409G11C11/4091G11C29/50G11C7/00G11C29/00
    • G11C11/4091G11C29/50G06F2201/81G11C11/401
    • In the Preferred embodiment of the present invention, a bit line pair is coupled through a pair of high-resistance pass gates to a sense amp. During sense, the high-resistance pass gates act in conjunction with the charge stored on the bit line pair as, effectively, a high-resistance passive load for the sense amp. A control circuit selectively switches on and off bit line equalization coincident with selectively passing either the equalization voltage or set voltages to the sense amp and an active sense amp load. Further, after it is set, the sense amp is selectively connected to LDLs through low-resistance column select pass gates. Therefore, the sense amp quickly discharges one of the connected LDL pair while the bit line voltage remains essentially unchanged. Thus, data is passed from the sense amp to a second sense amplifier and off chip. After data is passed to the LDLs, the control circuit enables the active sense amp load to pull the sense amp high side to a full up level. Additionally, because the control circuit uses the equalization voltage to disable the sense amp, cell signal margin may be tested in a new way. Instead of varying the sense amp reference voltage, as in prior art signal margin tests, cell signal margin is tested by varying cell signal. V.sub.S may be selected to determine both a high and a low signal margin.
    • 在本发明的优选实施例中,位线对通过一对高电阻通过门耦合到感测放大器。 在感测期间,高电阻通过门与存储在位线对上的电荷一起作为有效地用于感测放大器的高电阻无源负载。 控制电路选择性地接通和断开位线均衡,与选择性地将均衡电压或设定电压通过感测放大器和主动感测放大器负载相一致。 此外,在设置之后,感测放大器通过低电阻列选择通孔选择性地连接到LDL。 因此,当位线电压基本保持不变时,感测放大器会快速放电连接的LDL对之一。 因此,数据从感测放大器传递到第二读出放大器和芯片外。 数据传送到LDL后,控制电路使主动感测放大器负载将感测放大器的高端拉到一个完整的电平。 此外,由于控制电路使用均衡电压来禁用读出放大器,所以可以以新的方式测试单元信号余量。 代替检测放大器参考电压,如现有技术的信号余量测试,通过改变单元信号来测试单元信号余量。 可以选择VS来确定高和低信号余量。