Controlling a bitline bias voltage by sensing the bitline bias voltage, modifying a bitline bias control signal in accordance with the sensed bitline bias voltage, and controlling the bitline bias voltage in accordance with the modified bitline bias control signal. The modifying the bitline bias control signal is carried out by enabling a pull up circuit and disabling a pull down circuit in response to a first control signal and disabling the pull up circuit and enabling the pull down circuit in response to a second control signal.