design of an analog fuzzy logic controller chip

fuzzy logic has been developed over the past three decades into a widely applied techinque in classification and control engineering. today fuzzy logic control is one of the most important applications of fuzzy set theory and specially fuzzy logic. there are two general approachs for using of fuzzy control, software and hardware. integrated circuits as a solution for hardware realization are used since the late 1980s. in this way two types of implementations, analog and digital are possible. in this dissertation we design an analog fuzzy logic controller chip. in this design we propose two novel analog circuits for fuzzifeir and defuzzifeir interfaces. finally we construct a two-input one-output fuzzy logic controller in a 3 3 configuration with 9 rules and test it in some aspects to confirm its performance. inputs can be have three part membership functions that are tuneable. also 9 rules are accessible and tuneable. all of tests are done using hspice, and simulation results indicate full functionality. this structure can be implemented in less than 0.7 mm2 in a 1.2 m double-metal cmos technology.