Semiconductor memory device for low power system

摘要

An apparatus included in a semiconductor memory device for precharging a bit line and a bit line bar and sensing and amplifying a data delivered to one of the bit line and the bit line bar. A precharge block precharges the bit line and the bit line bar at a ground. A sense amplifying block senses and amplifies the data by using a low voltage having a lower voltage level than the ground and a high voltage having a higher voltage level than a supply voltage.