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    • 10. 发明授权
    • Mode entrance control circuit and mode entering method in semiconductor memory device
    • 半导体存储器件中的入口控制电路和模式进入方法
    • US06870783B2
    • 2005-03-22
    • US10661581
    • 2003-09-15
    • Choong-Keun KwakBo-Tak Lim
    • Choong-Keun KwakBo-Tak Lim
    • G11C5/14G11C7/10G11C11/4193G11C29/46
    • G11C7/1045G11C29/46
    • In a mode entrance control circuit and a mode entering method to stably enter a semiconductor memory device into a predetermined operating mode only when insensitive to a change of a process, temperature, or voltage, etc., and simultaneously satisfying a constant entrance condition, the mode entrance control circuit includes an operation control part for generating an operation enable signal when a first voltage applied through a first pad is over a first determination voltage, a voltage division part for dividing a second voltage applied through a second pad to generate a trimming reference voltage, and a mode entrance signal generating part operated in response to the operation enable signal, for comparing a level of an applied fixed reference voltage with a level of the trimming reference voltage, and for generating a mode entrance enable signal to allow the semiconductor memory device to enter into a predetermined mode.
    • 在模式入口控制电路和模式输入方法中,只有当对过程,温度或电压等的改变不敏感并且同时满足恒定的入口条件时,才能将半导体存储器件稳定地进入预定的操作模式, 模式入口控制电路包括:操作控制部分,用于当通过第一焊盘施加的第一电压超过第一确定电压时产生操作使能信号;分压部分,用于分割通过第二焊盘施加的第二电压,以产生修整参考 电压和模式入口信号产生部件,其响应于所述操作使能信号而被操作,用于将所施加的固定参考电压的电平与所述修整参考电压的电平进行比较,并且用于产生模式入口使能信号以允许所述半导体存储器 设备进入预定模式。