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    • 2. 发明授权
    • Sense amplifier for a memory device
    • 用于存储器件的感应放大器
    • US5126974A
    • 1992-06-30
    • US465040
    • 1990-01-16
    • Katsuro SasakiKatsuhiro ShimohigashiKoichiro IshibashiShoji Hanamura
    • Katsuro SasakiKatsuhiro ShimohigashiKoichiro IshibashiShoji Hanamura
    • G11C7/06G11C11/419
    • G11C7/062G11C11/419G11C7/065
    • A MOS transistor sense amplifier employs cross coupled positive feedback for the load circuit of a differential amplifier with an equalizing switch at the amplifier output, and preferably also at the input. This basis amplifier circuit may be repeated in stages. When stages are employed, it is desirable that the first stage employs current mirror loading of the differential amplifier to reduce the data delay. Data delay is further reduced by providing strong amplification during the sense portion of the read cycle with a preamplifier, which preamplifier has its amplification reduced, preferably to unity by being turned off, when the sense portion of the cycle is finished, and most preferably when the input and output data lines are directly connected independently of the preamplifier, so that the preamplifier may be completely turned off to lower power consumption.
    • MOS晶体管感测放大器采用交叉耦合的正反馈给差分放大器的负载电路,在放大器输出端具有均衡开关,优选也在输入端。 该基本放大器电路可以分阶段地重复。 当采用级时,期望第一级采用差分放大器的电流镜像负载来减少数据延迟。 通过在读周期的感测部分期间通过在前置放大器上提供强放大来进一步降低数据延迟,当循环的感测部分完成时,前置放大器的放大减小,优选地被关闭,优选地,当 输入和输出数据线独立于前置放大器直接连接,从而可以完全关闭前置放大器以降低功耗。
    • 3. 发明授权
    • Semiconductor memory having redundancy circuit for relieving defects
    • 具有用于消除缺陷的冗余电路的半导体存储器
    • US5021944A
    • 1991-06-04
    • US376245
    • 1989-07-06
    • Katsuro SasakiKatsuhiro ShimohigashiShoji Hanamura
    • Katsuro SasakiKatsuhiro ShimohigashiShoji Hanamura
    • G11C11/413G11C29/00G11C29/04
    • G11C29/846
    • A method and apparatus for quickly masking defective memory elements with substitute memory elements includes first and second memory blocks. The first memory block includes a first memory array and a second spare memory array. The second memory block includes a second memory array and a first spare memory array. A first word from the first memory array is selected concurrently with a first substitute word from the first spare memory. An address signal is decoded and then compared with data representative of a defective word. In the event it is determined, as a result of this comparison, that the first word is defective, the first substitute word is then communicated to a common data bus. Alternatively, the first word is communicated to the common data bus.
    • 用替代存储器元件快速掩蔽有缺陷的存储器元件的方法和装置包括第一和第二存储器块。 第一存储器块包括第一存储器阵列和第二备用存储器阵列。 第二存储器块包括第二存储器阵列和第一备用存储器阵列。 与来自第一备用存储器的第一替代字同时选择来自第一存储器阵列的第一个字。 地址信号被解码,然后与表示有缺陷的字的数据进行比较。 在确定的情况下,作为该比较的结果,第一个字是有缺陷的,然后第一个替代字被传送到公共数据总线。 或者,第一个字被传送到公共数据总线。
    • 4. 发明授权
    • Constant current-constant voltage circuit
    • 恒流恒压电路
    • US5047706A
    • 1991-09-10
    • US577512
    • 1990-09-05
    • Koichiro IshibashiKatsuro SasakiKatsuhiro Shimohigashi
    • Koichiro IshibashiKatsuro SasakiKatsuhiro Shimohigashi
    • G05F1/46G05F3/24G11C11/407H01L21/822H01L27/04
    • G05F3/247G05F1/463G05F1/465G05F3/245Y10S323/907
    • In a constant current-constant voltage circuit disclosed herein, gates of MOSFETs Q.sub.1 and Q.sub.2 are connected together, and the gate of the MOSFET Q.sub.1 is connected to the drain thereof. Further, the source of the MOSFET Q.sub.1 is connected to ground potential GND whereas the source of the MOSFET Q.sub.2 is connected to the drain of a MOSFET Q.sub.3 having a gate connected to power supply voltage V.sub.DD and a source connected to the ground voltage GND. A current mirror circuit including Q.sub.4 and Q.sub.5 has an input and an output respectively connected to the drain of the second MOSFET Q.sub.2 and the drain of the first MOSFET Q.sub.1. A first coefficient (W.sub.3 L.sub.2 /L.sub.3 W.sub.2) depending upon channel lengths (L.sub.2, L.sub.3) and channel widths (W.sub.2, W.sub.3) of the MOSFETs Q.sub.2 and Q.sub.3 is set at a value not larger than a predetermined value. Therefore, the MOSFET Q.sub.3 operates in a linear region as high resistance, and the MOSFETs Q.sub.1 and Q.sub.2 operate in a sub-threshold region. As a result, the dependence upon temperature is significantly improved.
    • 在本文公开的恒定电流恒定电压电路中,MOSFET Q1和Q2的栅极连接在一起,并且MOSFET Q1的栅极连接到其漏极。 此外,MOSFET Q1的源极连接到地电位GND,而MOSFET Q2的源极连接到具有连接到电源电压VDD的栅极和连接到地电压GND的源极的MOSFET Q3的漏极。 包括Q4和Q5的电流镜电路具有分别连接到第二MOSFET Q2的漏极和第一MOSFET Q1的漏极的输入和输出。 取决于MOSFET Q2和Q3的沟道长度(L2,L3)和沟道宽度(W2,W3)的第一系数(W3L2 / L3W2)被设置为不大于预定值的值。 因此,MOSFET Q3以高电阻工作在线性区域,并且MOSFET Q1和Q2在亚阈值区域中工作。 结果,对温度的依赖性显着提高。
    • 6. 发明授权
    • Static type semiconductor memory
    • 静态型半导体存储器
    • US5088065A
    • 1992-02-11
    • US593584
    • 1990-10-05
    • Shoji HanamuraMasaaki KuboteraKatsuro SasakiTakao OonoKiyotsugu Ueda
    • Shoji HanamuraMasaaki KuboteraKatsuro SasakiTakao OonoKiyotsugu Ueda
    • G11C7/06G11C11/419
    • G11C7/062G11C11/419
    • Information read out from a memory cell of a static type semiconductor memory is subjected to multi-stage sense amplification in an initial stage sense amplifier, a post-stage sense amplifier and a main amplifier and then transmitted to the input of an output buffer circuit. Since an equalizing circuit is connected to the complementary inputs of each stage of the multi-stage sense amplifier, an inverse information read operation can be executed at high speed. Initially, the initial stage sense amplifier, the post-stage sense amplifier and the main amplifier are controlled to operate in high amplification gain conditions so as to execute high speed sense amplification and thereafter controlled to operate in such low power consumption conditions that the read-out information output obtained by the high speed sense amplification will not disappear.
    • 从静态半导体存储器的存储单元读出的信息在初级读出放大器,后级读出放大器和主放大器中进行多级感测放大,然后传输到输出缓冲电路的输入端。 由于均衡电路连接到多级读出放大器的各级的互补输入,所以可以高速执行反向信息读取操作。 最初,初级读出放大器,后级读出放大器和主放大器被控制为在高放大增益条件下工作,以便执行高速感测放大,此后被控制以在低功耗条件下工作, 通过高速感测放大获得的输出信息输出不会消失。
    • 7. 发明授权
    • Static type semiconductor memory with multi-stage sense amplifier
    • 具有多级读出放大器的静态型半导体存储器
    • US4891792A
    • 1990-01-02
    • US215824
    • 1988-07-06
    • Shoji HanamuraMasaaki KuboteraKatsuro SasakiTakao OonoKiyotsugu Ueda
    • Shoji HanamuraMasaaki KuboteraKatsuro SasakiTakao OonoKiyotsugu Ueda
    • G11C11/419
    • G11C11/419
    • Information read out from a memory cell of a static type semiconductor memory is subjected to multi-stage sense amplification in an initial stage sense amplifier, a post-stage snese amplifier and a main amplifier and then transmitted to the input of an output buffer circuit. Since an equalizing circuit is connected to the complementary inputs of each stage of the multi-stage sense amplifier, an inverse information read operation can be executed at high speed. Initially, the initial stage sense amplifier, the post-stage sense amplifier and the main amplifier are controlled to operate in high amplification gain conditions so as to execute high speed sense amplification and thereafter controlled to operate in such low power consumption conditions that the read-out information output obtained by the high speed sense amplification will not disappear.
    • 从静态型半导体存储器的存储单元读出的信息在初级读出放大器,后置放大器和主放大器中进行多级感测放大,然后传输到输出缓冲器电路的输入端。 由于均衡电路连接到多级读出放大器的各级的互补输入,所以可以高速执行反向信息读取操作。 最初,初级读出放大器,后级读出放大器和主放大器被控制为在高放大增益条件下工作,以便执行高速感测放大,此后被控制以在低功耗条件下工作, 通过高速感测放大获得的输出信息输出不会消失。