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    • 1. 发明公开
    • Variable slew rate output driver for high speed, low voltage non-volatile memory
    • Ausgangstreiberschaltung mit variabler AnstiegsgeschwindigkeitfürnichtflüchtigenNiederspannungsspeicher
    • EP1189235A1
    • 2002-03-20
    • EP01124283.1
    • 1996-07-19
    • ATMEL CORPORATION
    • Jazayeri, MehdiHui, Edward S.Korsh, George J.
    • G11C7/10G11C16/26H03K17/16H03K19/003
    • G11C8/08G11C16/08G11C16/26
    • 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.
    • 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。