| 摘要 |
An overdriving control circuit includes a comparator for receiving a sense amplifier enable signal and comparing a voltage of bit line or bit bar line with a reference voltage, and a sense amplifier driving unit for logically combining the sense amplifier enable signal and an output signal of the comparator and outputting a control signal of a switch which selectively supplies an internal voltage and an external voltage. The circuit senses a variation of the external voltage or a bouncing of source voltage and controls the overdriving region, thereby obtaining a sufficient overdriving region and accelerating the operation of a sense amplifier.
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