SEMICONDUCTOR MEMORY APPARATUS

摘要

PURPOSE: A semiconductor memory device is provided to improve data reliability by decreasing data sensing margin when a resistance value of a resistive memory cell is changed according to the change of a temperature. CONSTITUTION: A sensing current supply unit(200) increases an amount of sensing currents in proportion to a temperature rise and decreases the amount of sensing currents in proportion to a temperature fall when the sensing current is supplied to the resistive memory cell. A data sensing unit(400) senses a sensing voltage in a sensing node by the sensing current and outputs the sensing voltage as output data. A voltage clamping unit(500) is inserted between the sensing node and the resistive memory cell and clamps a voltage in the sensing node.