A CMOS Current-Mode Implementation of Multiple Input Fuzzy MIN and MAX Circuits for Analog Fuzzy Processors

The design and simulation of a multi-input fuzzy MIN and MAX circuits based on a new strategy taking analog design advantages such as low die area, high speed, and simplicity is considered in this paper. Modular current-mode circuits to obtain the minimum and maximum of N analog inputs are described. For implementing this idea, new current mode circuits are proposed which is based on the Wilson current mirror. The proposed circuit has a very sharp transfer characteristic and can be used for the hardware realization of real-time fuzzy inference system. The realization method is suitable for fabrication using CMOS technology. The performances of the proposed circuit were studied by the use of the spice analog simulation program. The circuit shows the merit of having high accuracy and a large dynamic range. Its operation is discussed and illustrated with simulation results.