Sanyo Electric Co., Ltd.

Sanyo Semiconductor Co., Ltd.

Jumpei Maruyama

Sadao Yoshikawa

This invention offers a semiconductor memory device, with which a resolution to read-out data is not reduced even at the time of verify and a stable read-out operation is possible even when a power supply voltage is reduced. A read-out circuit is provided with a current-voltage conversion circuit, that converts a cell current into a data voltage, and a sense amplifier that compares the data voltage with a reference voltage. The current-voltage conversion circuit is formed to include a variable load resistor that is connected to the memory cell through a bit line. The variable load resistor is formed to include P channel type MOS transistors that make load resistors and P channel type MOS transistors that constitute a switching circuit.

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Saitama, Japan

Jumpei Maruyama