CMOS Fuzzy Decision Diagram Implementation

The subject of the study is design of multi-valued (analog) CMOS fuzzy controllers. A functional completeness of summing amplifier with saturation in a multivalued logic of an arbitrary value proven in previous works gives a theoretical background for analog implementation of fuzzy devices. Compared with the traditional approach based on explicit fuzzification / defuzzification procedures analog fuzzy implementation has the advantages of higher speed, lower power consumption, smaller die area and more. In the present paper, we expand functional capabilities of summing amplifier by using "masking of the input". The paper provides design example for an industrial fuzzy controller implementation by the proposed mask circuit and SPICE simulations of the controller. Key-Words: Fuzzy Logic, Multi-Valued Logic, Decision Diagrams, Fuzzy Controller, CMOS Circuits.