SENSE AMPLIFIER OF SEMICONDUCTOR MEMORY AND SEMICONDUCTOR MEMORY DEVICE

摘要

PROBLEM TO BE SOLVED: To guarantee stable and quick sense operation even if integrated density is increased and power source voltage is made low. SOLUTION: This sense amplifier comprises a reference voltage generator 200 generating reference voltage at a reference node, a sense voltage generator 100 connected to a reference node and generating sense voltage at a sense node in accordance with an ON or OFF state of a memory cell, and a level detector 300 connected to a sense node, detecting whether sense voltage is higher than a prescribed reverse voltage or not, and outputting a logic low or high signal indicating an ON or OFF state of a memory cell.