Semiconductor memory device
    3.
    发明授权
    Semiconductor memory device 失效
    半导体存储器件

    公开(公告)号:US4730320A

    公开(公告)日:1988-03-08

    申请号:US825869

    申请日:1986-02-04

    IPC分类号: G06F11/10 G06F11/267

    摘要: A semiconductor memory device comprises a data input switching circuit (20) connected between the output side of a write check bit generating circuit (2) and the input side of a check bit memory cell array (32), a data output switching circuit (30) connected to the input side of an address decoder (9), and an address switching circuit (10) connected to the output side of the address decoder (9). When a test mode is entered, the data input switching circuit (2), data output switching circuit (30) and address switching circuit (10) connect a data input signal line (l), data output signal line (m) and address signal line (n), respectively, to the check bit memory cell array (32), enabling the check bit memory cell array (32) to be accessed from the outside.

    摘要翻译: 半导体存储器件包括连接在写入校验位产生电路(2)的输出侧和校验位存储单元阵列(32)的输入侧之间的数据输入切换电路(20),数据输出切换电路(30) )和连接到地址解码器(9)的输出侧的地址切换电路(10)。 当输入测试模式时,数据输入切换电路(2),数据输出切换电路(30)和地址切换电路(10)连接数据输入信号线(l),数据输出信号线(m)和地址信号 (n)分配给校验位存储单元阵列(32),从而能够从外部访问校验位存储单元阵列(32)。

    Dynamic RAM having full-sized dummy cell
    6.
    发明授权
    Dynamic RAM having full-sized dummy cell 失效
    具有全尺寸虚拟单元的动态RAM

    公开(公告)号:US4734890A

    公开(公告)日:1988-03-29

    申请号:US929369

    申请日:1986-11-12

    CPC分类号: G11C11/4099 G11C11/4087

    摘要: A dynamic RAM has dummy capacitors (C6, C7) having the same capacitance as a memory capacitor connected to a pair of bit lines (BL1, BL1), respectively. During an active period, respective dummy capacitors (C6, C7) are charged to the H level and L level, which are signal levels of the bit lines (BL1, BL1) and during precharge period, both dummy capacitors are equalized. Since both dummy capacitors (C6, C7) respectively connected to a pair of bit lines (BL1, BL1) are equalized during precharge period, so that the stored charge values of the dummy capacitors (C6, C7) both become the intermediate value of the ground level and supply potential level.

    摘要翻译: 动态RAM分别具有与连接到一对位线(BL1,&上升和下降B1)的存储电容器相同的电容的虚拟电容器(C6,C7)。 在有效期间,将各个虚拟电容器(C6,C7)充电为位电平(BL1,上升和下降B1)的信号电平的H电平和L电平,并且在预充电期间,两个虚拟电容器被均衡。 由于分别连接到一对位线(BL1,<上升& B1)的两个虚拟电容器(C6,C7)在预充电期间均衡,所以虚拟电容器(C6,C7)的存储的电荷值均成为 地面水平和供应潜力水平。

    Semiconductor memory device
    9.
    发明授权
    Semiconductor memory device 失效
    半导体存储器件

    公开(公告)号:US4760559A

    公开(公告)日:1988-07-26

    申请号:US883311

    申请日:1986-07-08

    CPC分类号: G11C11/4085

    摘要: A dynamic type MOS-RAM constructed of folded type bit lines and having sense operation cycles for amplifying potential difference appearing on respective pairs of bit lines after selection of a word line and restore operation cycles for further amplifying the potential difference on the pairs of bit lines after the sense operation cycles, wherein non-selected word lines are completely brought into electrically floating states in intervals including the sense operation cycles and the restore operation cycles.

    摘要翻译: 由折叠型位线构成的具有读出操作周期的动态型MOS-RAM,用于放大在选择字线之后出现在各对位线上的电位差,并且还原操作周期用于进一步放大位线对上的电位差 在感测操作周期之后,其中未选择的字线在包括感测操作周期和恢复操作周期的间隔中完全进入电浮动状态。

    Semiconductor memory
    10.
    发明授权
    Semiconductor memory 失效
    半导体存储器

    公开(公告)号:US4692901A

    公开(公告)日:1987-09-08

    申请号:US762632

    申请日:1985-08-05

    IPC分类号: G11C29/34 G11C7/00

    CPC分类号: G11C29/34

    摘要: A semiconductor memory comprises memory cells (15-18, 27-30), a data writing terminal (1), a data readout terminal (48), transistors (3-10, 35-42), address signal input terminals (23-26), subdecode signal input terminals (43-46), driving signal generating circuits (49-52), parallel readout circuits (79-82) and test mode switching signal input terminal (53, 88). In writing of function test data for the memory cells, the driving signal generating circuits turn all of the transistors (3-10) on in response to a test mode switching signal with no regard to address signals, thereby to simultaneously write data in the memory cells (15-18). Further, in readout of the function test data for the memory cells, the parallel readout circuits read the storage contents of the memory cells (27-30) storing the test data in response to a test mode switching signal with no regard to subdecode signals. Logic circuit means (90, 91, 94) may be provided to output logical value corresponding to the test data stored in the memory cells when all of the logical values of the test data are at the same level.

    摘要翻译: 半导体存储器包括存储单元(15-18,27-30),数据写入端(1),数据读出端(48),晶体管(3-10,35-42),地址信号输入端(23- 26),子代码信号输入端子(43-46),驱动信号发生电路(49-52),并行读出电路(79-82)和测试模式切换信号输入端子(53,88)。 在写入存储单元的功能测试数据时,驱动信号发生电路响应于测试模式切换信号而使所有晶体管(3-10)响应于地址信号,从而同时将数据写入存储器 细胞(15-18)。 此外,在读出存储单元的功能测试数据时,并行读出电路响应于不考虑子代码信号的测试模式切换信号读取存储测试数据的存储单元(27-30)的存储内容。 可以提供逻辑电路装置(90,91,94)以当测试数据的所有逻辑值处于相同电平时输出与存储在存储单元中的测试数据相对应的逻辑值。