PURPOSE:To remove imarginary short-circuit constitution based upon an operational amplifier and to simplify the constitution in this defuzzyfier circuit. CONSTITUTION:The defuzzyfier circuit consists of a weighted adder 1 for multiplying respective electric signals expressing fuzzy information distributed on plural lines by respective values corresponding to the order of lines and adding respective multiplied values, a simple adder 6 for adding the electric signals without weighting them, a current detecting circuit 9 connected to the adder 6, a constant current control circuit 10 for directing connecting the lower stream of a simply added resistor to the lower stream of a weighted added resistor at a point P and connected to the point P, and an output circuit 8 connected to the adder 1.
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