Patent ID: 6735120
Filing Date: 2004-05-11
Classification: G11C

Abstract:
A semiconductor memory device that reads data stored in a memory cell in accordance with a result of a comparison between one of reference signals and a signal read out from the memory cell having a gate connected to a word line, said device comprising:a plurality of reference cells that have gates connected to different locations on a reference word line, and hold the reference signals; a selection unit that selects one of the reference signals read out from the plurality of reference cells for the comparison, in accordance with a location of connection of the gate of the memory cell to the word line; a word line driver that drives the word line; and a reference word line driver that drives the reference word line, wherein the selection unit selects the reference signal read out from the reference cell having the gate connected to the reference word line at a distance from the reference word line driver when the gate of the memory cell is connected to the word line at a corresponding distance from the word line driver.