A programmable CMOS fuzzy membership function generator

This paper presents the architecture and circuit-level details related to hardware implementation of a programmable analog Membership Function Circuit (MFC). Its new architecture and modular approach makes it flexible and easy to expand. The proposed circuit has a wide dynamic input range (3.5 V) and can be modified in a way that the output of the circuit may be in single-ended or differential mode. In addition width, height, position and slope of generated membership functions are easily tunable. Brief tutorials of the circuits introduced by other papers are presented here for comparison. Simulation results are also given using HSPICE software in 0.5mum CMOS technology.