Patent ID: 7579821

Claim:
A voltage generator comprising: a bias signal generator configured to generate first to fourth bias signals using a reference voltage having a voltage level that is one half of a power supply voltage, the first to fourth bias signals having different voltage levels, the first bias signal having a voltage level greater than that of the reference voltage by a predetermined voltage level, the second bias signal having a voltage level less than that of the reference voltage by a predetermined voltage level; a driving signal generator configured to receive the first and third bias signals to generate a pull-up signal in response to a voltage level of an output terminal for a bit line precharge voltage and to receive the second and fourth bias signals to generate a pull-down signal in response to a voltage level of the output terminal for the bit line precharge voltage; a voltage driver configured to pull up and pull down a voltage level of the output terminal in response to the pull-up signal and the pull-down signal, respectively; and an auxiliary driving controller configured to increase a voltage level of the pull-up signal when the voltage level of the output terminal for the bit line precharge voltage increases and to decrease the pull-down signal when the voltage level of the output terminal for the bit line precharge voltage decreases in response to the first and second bias signals and the voltage level of the output terminal for the bit line precharge voltage.