An analogue CMOS defuzzification circuit with representation of triangular membership functions

An improved method of performing defuzzification has been identified, together with the realisation of this method using analogue current mode circuitry. The circuits are suitable for fabrication in a standard CMOS process. The defuzzification method is based on the Normalisation Locked Loop (NLL) method, with improvements to allow the processing of triangular membership functions whilst ensuring that relative rule weights are preserved. The circuit used to implement this technique is from the family of saturation-mode, square-law circuits proposed by Bult and Wallinga (1987). Results of simulations are presented and discussed