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    • 29. 发明授权
    • Nonvolatile semiconductor storage unit
    • 非易失性半导体存储单元
    • US06999348B2
    • 2006-02-14
    • US10501391
    • 2002-02-28
    • Michitaro KanamitsuYoshinori TakaseShoji Kubono
    • Michitaro KanamitsuYoshinori TakaseShoji Kubono
    • G11C11/34
    • G11C16/26
    • A nonvolatile semiconductor storage unit can prevent erratic sense operations in a sense latch circuit by adopting a single-end sensing system capable of reducing an area (decreasing the number of elements). There is provided a flash memory chip using the single-end sensing system and an NMOS gate sensing system together. In the single-end sensing system, the sense latch circuit is connected to one end of a global bit line to detect data on the global bit line corresponding to a threshold voltage for a memory cell. The NMOS gate sensing system uses an NMOSFET to receive data on the global bit line at a gate and drive a node for the sense latch circuit. The NMOSFET senses a sense voltage. The sense latch circuit is activated with a sufficient signal quantity ensured. An output voltage from a threshold voltage applying power supply precharges the global bit line. In this manner, it is possible to always keep a constant difference between a precharge voltage and a threshold voltage for the NMOSFET.
    • 非易失性半导体存储单元可以通过采用能够减小面积(减少元件数量)的单端感测系统来防止感测锁存电路中的错误检测操作。 提供了使用单端感测系统和NMOS栅极感测系统的闪存芯片。 在单端感测系统中,感测锁存电路连接到全局位线的一端以检测对应于存储器单元的阈值电压的全局位线上的数据。 NMOS栅极感测系统使用NMOSFET在栅极处的全局位线上接收数据,并驱动用于感测锁存电路的节点。 NMOSFET感测感测电压。 感测锁存电路在确保足够的信号量的情况下被激活。 来自施加电源的阈值电压的输出电压预充电全局位线。 以这种方式,可以始终保持NMOSFET的预充电电压和阈值电压之间的恒定差。