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    • 5. 发明授权
    • Semiconductor memory device having short refresh time
    • 具有短刷新时间的半导体存储器件
    • US07123534B2
    • 2006-10-17
    • US10943895
    • 2004-09-20
    • Hiroaki NambuNoriyuki Homma
    • Hiroaki NambuNoriyuki Homma
    • G11C7/00
    • G11C11/40603G11C11/406G11C11/4085G11C11/4096G11C2211/4065
    • A semiconductor memory device in which memory cells are arranged at intersections between the word lines and the bit lines includes a control unit for selecting, in a second half of a cycle in which a first word line is selected from the word lines to conduct a read or write operation for a first memory cell coupled with the first word line, a second word line other than the first word line and refreshing memory cells corresponding to the second word line. The memory cell includes an amplifier section including two driver transistors of which gate and drain electrodes are respectively cross-coupled with each other and a switch section including selector transistors coupling the amplifier section with the bit lines according to a selection signal on the bit line. Either one of each transistor and each selector transistor is an n-channel transistor or a p-type transistor.
    • 一种半导体存储器件,其中存储器单元布置在字线和位线之间的交叉处,包括控制单元,用于在从字线中选择第一字线以进行读取的周期的后半段中进行选择 或与第一字线耦合的第一存储单元的写入操作,除第一字线以外的第二字线和对应于第二字线的刷新存储单元。 存储单元包括放大器部分,其包括两个驱动晶体管,栅极和漏极彼此分别交叉耦合;以及开关部分,包括根据位线上的选择信号将放大器部分与位线耦合的选择晶体管。 每个晶体管和每个选择晶体管中的任一个是n沟道晶体管或p型晶体管。
    • 6. 发明申请
    • Semiconductor memory device
    • 半导体存储器件
    • US20050013160A1
    • 2005-01-20
    • US10917321
    • 2004-08-13
    • Keiichi HigetaShigeru NakaharaHiroaki Nambu
    • Keiichi HigetaShigeru NakaharaHiroaki Nambu
    • G11C8/02G11C11/41G11C11/412G11C11/413G11C11/417H01L21/8244H01L27/10H01L27/11G11C11/00
    • G11C11/417G11C11/412
    • Disclosed herein is a semiconductor memory device having a memory array comprising CMOS flip-flop circuit type memory cells, which is capable of improving a noise margin, making a read rate fast and reducing power consumption. In the semiconductor memory device, an operating voltage of the memory cell is set higher than an operating voltage of each of peripheral circuits. Threshold voltages of MOS transistors that constitute the memory cell, are set higher than those of MOS transistors constituting the peripheral circuit. A gate insulting film for the MOS transistors that constitute the memory cell, is formed so as to be regarded as thicker than a gate insulting film for the MOS transistors constituting the peripheral circuit when converted to an insulating film of the same material. Further, a word-line selection level and a bit-line precharge level are set identical to the level of the operating voltage of the peripheral circuit.
    • 这里公开了一种半导体存储器件,其具有包括CMOS触发器电路型存储单元的存储器阵列,其能够提高噪声容限,使得读取速度快并降低功耗。 在半导体存储器件中,将存储单元的工作电压设定得高于外围电路的工作电压。 构成存储单元的MOS晶体管的阈值电压被设定为高于构成外围电路的MOS晶体管的阈值电压。 构成存储单元的MOS晶体管的栅极绝缘膜形成为当被转换为相同材料的绝缘膜时,构成构成外围电路的MOS晶体管的栅极绝缘膜更厚。 此外,字线选择电平和位线预充电电平被设置为与外围电路的工作电压的电平相同。
    • 10. 发明申请
    • SEMICONDUCTOR INTEGRATED CIRCUIT
    • 半导体集成电路
    • US20080072095A1
    • 2008-03-20
    • US11936543
    • 2007-11-07
    • Hiroaki NambuMasao ShinozakiKazuo KanetaniHideto Kazama
    • Hiroaki NambuMasao ShinozakiKazuo KanetaniHideto Kazama
    • G06F1/12G06F13/42H04L5/00H04L7/00
    • G11C11/413G06F1/04G11C11/419
    • A semiconductor integrated circuit is provided in which the timing margin for fetching data is prevented from being reduced even in the case where the duty ratio of a clock signal is different from 50%. The semiconductor integrated circuit includes: a clock input terminal for receiving a clock signal; a data input terminal for receiving a data signal; internal clock generating circuits for generating an internal clock signal which is switched at an intermediate timing between the i-th (i: an integer of 1 or larger) switch timing and the (i+1)th switch timing of the clock signal; and a latch circuit for latching the data signal synchronously with the internal clock signal. An internal clock signal which is switched at an intermediate timing between the i-th switch timing and the (i+1)th switch timing of the clock signal is generated, and the data signal is fetched synchronously with the internal clock signal.
    • 提供一种半导体集成电路,其中即使在时钟信号的占空比不同于50%的情况下,也可以防止用于取出数据的定时裕度。 半导体集成电路包括:时钟输入端子,用于接收时钟信号; 用于接收数据信号的数据输入端; 内部时钟发生电路,用于产生在第i(i:1或更大的整数)切换定时与时钟信号的第(i + 1)切换定时之间的中间定时切换的内部时钟信号; 以及与内部时钟信号同步地锁存数据信号的锁存电路。 产生在时钟信号的第i开关定时和第(i + 1)开关定时之间的中间定时切换的内部时钟信号,并且与内部时钟信号同步取出数据信号。