SEMICONDUCTOR MEMORY DEVICE

摘要

PURPOSE: A semiconductor memory device is provided to reduce power consumption and time for a writing operation on a reference memory cell. CONSTITUTION: A plurality of memory cells(410) stores data. A data current generator(430) generates data current corresponding to the selected memory cell by a plurality of word lines. A reference current generator(440) generates a reference current corresponding to the reference memory cell selected by the plurality of word lines. A sense amplifier(450) sense and amplifies the data current and the reference current. A memory cell writing driver(460) drives a source line and a bit line in response to data.