Compact modular expandable analog defuzzifiers using multiple-input floating gate transistor transconductance multipliers

An implementation of a low-voltage analog defuzzifier module is introduced. It employs low distortion, very compact analog multipliers with multiple-input floating gate transistors. Experimental and simulation results from a test chip verify the proposed scheme. The total harmonic distortion of the multiplier is less than 0.1% and its silicon area is only 180x150 mu m(2) in 2 mu m CMOS technology. Orbit 2um low-noise N-well MOSIS fabrication technology has been used for the fabrication of test chip prototypes. A new scheme for the modular expansion of analog defuzzifiers with arbitrary number of rules and outputs variables is presented.