Variable resistor and neuro device using the variable resistor f

Details Variable resistor and neuro device using the variable resistor f Variable resistor and neuro device using the variable resistor f

1993-06-30

1994-03-22

Lateef, Marvin M.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338 20, 338204, 338322, 338332, 338333, 338334, 257537, H01C 710

Patent

active

052968359

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.

REFERENCES:
patent: 3659149 (1972-04-01), Fleming
patent: 5070385 (1991-12-01), Evans, Jr. et al.
patent: 5119329 (1992-06-01), Evans, Jr. et al.
patent: 5130773 (1992-07-01), Tsukada

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