International Journal of Multidisciplinary Sciences and Engineering (IJMSE)
The researchers proposed in 1965 logic with fuzzy truth, connection and rules of inference, which was named fuzzy logic. This approach has been successfully applied in many fields, like automatic process control and expert system and pattern recognition. The fundamental operation in fuzzy logic is fuzzification which consists of the determination of the degree of association of a variable to a fuzzy set and is implemented by means of fuzzifier. This circuit provides a nonlinear relation that measures the compatibility of an object with the concept represented by a fuzzy set.