SEMICONDUCTOR MEMORY DEVICE AND SENSE AMPLIFIER THEREOF

摘要

PURPOSE: A semiconductor memory device and a sense amplifier thereof are provided to improve the reliability by stabilizing an operation under low voltage. CONSTITUTION: A semiconductor memory device includes a memory cell array, a predischarge circuit, an input/output gate circuit, and a sense amplifier. The memory cell array includes a plurality of memory cells connected between a plurality of word lines and a plurality of bit lines. The predischarge circuit predischarges the bit lines in a predischarging operation. The input/output gate circuit transmits data between the bit lines and the data lines in a read operation. The sense amplifier includes a bias circuit(30) for biasing the data lines to bias voltage levels and a sense amplifier circuit(32) for generating a sense output signal by amplifying the bias voltage level.