Memristor-based Center-Of-Gravity (COG) defuzzifier circuit

This work proposes a novel Center-Of-Gravity (COG) defuzzifier circuit based on memristors. The proposed circuit overcomes the prime disadvantage of COG defuzzifiers which is area occupancy via the use of memristors. The main idea in the circuit is to store the singletons (output fuzzy sets) in the memconductance (reciprocal of the memristance). This reduces the multiplication into Ohm´s Law which provides significant area reduction. Meanwhile, the proposed circuit avoids the use of extensive analog processing in order to maintain high robustness. Simulations were successfully conducted to validate the functionality of the circuit.