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    • 10. 发明申请
    • SEMICONDUCTOR INTEGRATED CIRCUIT
    • 半导体集成电路
    • US20100073999A1
    • 2010-03-25
    • US12445075
    • 2006-10-12
    • Naoki KitaiSatoru HanzawaAkira Kotabe
    • Naoki KitaiSatoru HanzawaAkira Kotabe
    • G11C7/00G11C11/00G11C11/419G11C13/00
    • G11C11/419G11C7/065G11C13/0004G11C16/28G11C2013/0054G11C2213/82
    • In a readout circuit (RC) which detects a difference between a change that appears on a first signal line (CBL) and a change that appears on a second signal line (CBLdm) according to stored information of each selected memory cell, the first signal line and the second signal line are separated selectively from input nodes of a data latch circuit (DL) through second MOS transistors (MN3 and MN4) and capacitively coupled to the input nodes of the data latch circuit via gates of first MOS transistors (MP1 and MP2) respectively. In this separated state, the first and second signal lines and the input nodes of the data latch circuit are precharged to different voltages, so that the gate-to-source and drain-to-source voltages of the first MOS transistors are controlled by the voltages of the first and second signal lines respectively. Therefore, when the first and second signal lines are varied and the separated state is released upon a read operation, the first MOS transistors start to operate in a saturated region, thereby realizing a high-speed read operation.
    • 在根据每个所选存储单元的存储信息检测出现在第一信号线(CBL)上的变化与出现在第二信号线(CBLdm)上的变化之间的差异的读出电路(RC)中,第一信号 线路和第二信号线通过第二MOS晶体管(MN3和MN4)选择性地从数据锁存电路(DL)的输入节点分离,并且经由第一MOS晶体管(MP1和...的栅极)电容耦合到数据锁存电路的输入节点 MP2)。 在这种分离状态下,数据锁存电路的第一和第二信号线和输入节点被预充电到不同的电压,使得第一MOS晶体管的栅极至源极和漏极到源极的电压由 分别是第一和第二信号线的电压。 因此,当第一和第二信号线变化并且在读取操作时释放分离状态时,第一MOS晶体管开始在饱和区域中工作,从而实现高速读取操作。