Design of Mixed Mode Fuzzy Logic Controller for Integrated MEMS System

Architecture of a mixed mode fuzzy controller for Integrated MEMS System is designed. The architecture needs no A/D or D/A converters. The fuzzification and defuzzification are implemented in analog technique, while the inference unit operates digital. So the advantages of analog (e.g. small chip area, fast and low number of wires) and digital (e.g. programmable and sequential processing) can be used. The new idea of this architecture is to use pointers instead of the analog values. So it is possible to use a digital inference unit and the analog signals will he switched directly from the fuzzification unit to the defuzzification unit without distortion by the inference unit. We used 4 membership functions for each of the 4 inputs and 4 singletons for the output. The degree of overlap of the membership functions is limited to 2 inputs.