Variable resistor and neuro device using the variable resistor for weighting

Abstract

A Neuro device is a representation of a nerve cell constituting human brains, eyes and the like, that is, a neuron by an electronic circuit. A circuit of the Neuro device according to the present invention comprises n (n : natural number) input terminals 4, n variable resistors 8 (the resistance values of the n variable resistors 8 are respectively set to R1, R2,..., Rn) respectively connected to the input terminals 4, and an arithmetic circuit 100 to which signals from the variable resistors 8 are together applied, and an output terminal 5 to which a signal from the arithmetic circuit 100 is outputted. The variable resistor 8 is so constructed that a chalcogenide semiconductor is interposed between a pair of electrodes. The chalcogenide semiconductor can be reversibly transferred to a high resistive amorphous state and a low resistive crystallized state by applying a predetermined write voltage. In the present invention, a predetermined proportion of the chalcogenide semiconductor interposed between the pair of electrodes is brought into a crystallized state, while the remaining proportion thereof is brought into an amorphous state, thereby to construct a variable resistor having a desirable resistance value.

Dependencies are inferred from the claim text.