Patent ID: 7675798
Filing Date: 2010-03-09
Classification: G11C

Abstract:
1. A sense amplifier control circuit comprising: an enable signal generator configured to decode an active command and a pre-charge command, and generate a first enable signal and a second enable signal which are enabled when the active command is enabled; a first driving control signal generator configured to receive the first enable signal, and generate a first driving control signal which is enabled to drive a pull-down source line connected to a sense amplifier into a level of a ground voltage; a second driving control signal generator configured to compare a level of a pull-up source line connected to the sense amplifier with a level of an internal voltage, and generate a second driving control signal, the second driving control signal being enabled when the level of the pull-up source line is higher than the level of the internal voltage and being enabled to drive the pull-up source line into the level of the internal voltage; and a third driving control signal generator configured to receive the second enable signal and the second driving control signal, and generate a third driving control signal, the third driving control signal being enabled to drive the pull-up source line into the level of an external voltage and being disabled when the first driving control signal is enabled.