Patent ID: 6351178
Filing Date: 2002-02-26
Classification: G11C

Abstract:
A reference potential generating circuit for generating a reference potential between first and second potentials, comprising:an output node at which said reference potential is generated; a first transistor of a first conductivity type having one conduction electrode connected to said output node, and another conduction electrode connected to a first node to which a third potential is applied; a second transistor of a second conductivity type having one conduction electrode connected to said output node, and another conduction electrode connected to a second node to which a fourth potential is applied; a third transistor of the first conductivity type having one conduction electrode connected to said output node, another conduction electrode connected to a third node to which a fifth potential is applied, and a channel length longer than that of said first transistor; a fourth transistor of the second conductivity type having one conduction electrode connected to said output node, another conduction electrode connected to a fourth node to which a sixth potential is applied, and a channel length longer than that of said second transistor; first applying means for applying a first control potential higher than said reference potential by at least a threshold voltage of said first transistor to control electrodes of said first and third transistors; and second applying means for applying a second control potential lower than said reference potential by at least a threshold voltage of said second transistor to control electrodes of said second and fourth transistors.