Analog realization of fuzzifier for IT2 fuzzy processor

In this paper, design of CMOS based fuzzifier block for a general purpose Interval type-2 fuzzy processor is presented. The fuzzifier generates the Footprints of Uncertainty (FOU) for the input variables. It can implement four basic membership functions (MFs) viz. Z, trapezoidal, triangle and S. The characteristics (width, slope, position) of the lower and upper bounds of the FOU are easily adjustable. The simulations of the fuzzifier have been carried out by the Spectre tool of Cadence and the proposed design has been implemented for a two inputs function each having three MFs on 0.18um technology using Cadence Virtuoso Schematic/Layout Editor. Power consumption of the fuzzifier is 2.64mW and it occupies an area of 0.006mm.