A novel CMOS switched-current mode sequential shift forward inference circuit for fuzzy logic controller

A novel switched-current (SI) mode sequential shift forward inference circuit for a fuzzy logic controller (FLC) is presented. The cumulative error in each inference cycle is effectively cancelled in comparison with the previous architecture. SI basic cells are employed for high-frequency and low-voltage operation. The sequential structure ensures a low-power and compact realization whereas the digital portion is fully programmable. The analog input signal is processed directly without the need of an A/D or D/A interface. SPECTRE simulation results validate the feasibility of the proposed controller that is implemented in 0.35-mum CMOS with a battery 1.5-V supply.