Fuzzy decision diagram realization by analog CMOS summing amplifiers

The functional completeness of a summing amplifier with saturation in an arbitrary value multi-valued logic, proven in previous works, gives a theoretical background for analog implementation of fuzzy devices. Practical design techniques for multi-valued analog fuzzy controllers still have to be developed. Compared with the traditional approach, analog CMOS fuzzy controller implementation has the advantages of higher speed, lower power consumption, smaller die area and more. This paper introduces some special design techniques and provides design examples for an industrial fuzzy controller implementation confirmed by SPICE simulations.