Analysis and design of CMOS fuzzy logic controller in current mode

This paper presents a new definition of fuzzy numbers. Employing the new definition, the new approach to the design of a current mode fuzzy microchip controller was performed. The controller was constructed with CMOS current mirrors. The circuit allowed two premises, one conclusion, and nine rules; the latter were programmable with current sources. The chip consumed 2 mA at a 5 V power supply for a core area of 0.4 mm². Furthermore, the performance of the developed fuzzy architecture reached 10 M FLIPS (fuzzy inferences per second) for the standard 1.2 μm CMOS technology. We present a real-time application that successfully used the chip to control a metallic ball with an electromagnetic field. Finally, we discuss the silicon compiler, called SCOFIC, used for the automatic synthesis of the above circuit