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1. 发明公开

EP1189235A1 Variable slew rate output driver for high speed, low voltage non-volatile memory 失效
标题翻译： Ausgangstreiberschaltung mit variabler AnstiegsgeschwindigkeitfürnichtflüchtigenNiederspannungsspeicher
公开(公告)号：EP1189235A1
公开(公告)日：2002-03-20
申请号：EP01124283.1
申请日：1996-07-19
申请人： ATMEL CORPORATION
发明人： Jazayeri, Mehdi , Hui, Edward S. , Korsh, George J.
IPC分类号： G11C7/10 , G11C16/26 , H03K17/16 , H03K19/003
CPC分类号： G11C8/08 , G11C16/08 , G11C16/26
摘要： A low voltage EPROM which increases its reading speed by charging a word line to a voltage higher than V cc during a read operation. Two voltage pumps, which alternatively place charge on a word line, receive control signals of opposite phase from a temperature insensitive oscillator. The voltage from the two voltage pumps passes through a zero threshold voltage ntype pass device to a word line. The zero threshold voltage n-type pass device receives its control signal from a third voltage pump. In order to make the low voltage EPROM compatible with standard 5V programmers, each output driving circuit consists of a large output driver (55) used under low voltage V cc conditions and a smaller output driver (57) used under standard 5V V cc conditions.
摘要翻译：一种低电压EPROM，其通过在读取操作期间将字线充电至高于Vcc的电压来增加其读取速度。两个电压泵可替代地在字线上放置电荷，从温度不敏感的振荡器接收相反相位的控制信号。来自两个电压泵的电压通过零阈值电压n型通过装置到字线。零阈值电压n型通过装置从第三电压泵接收其控制信号。为了使低压EPROM与标准5V编程器兼容，每个输出驱动电路由在低电压Vcc条件下使用的大输出驱动器（55）和在标准5V Vcc条件下使用的较小输出驱动器（57）组成。

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