Low voltage BiCMOS membership function circuit for analog VLSI fuzzy control implementation

Abstract

A simple BiCMOS circuit that approximates a triangular transconductance characteristic with programmable height, slope and horizontal position is presented. Experimental results of a BiCMOS test chip that verify the operation of the circuit are shown. The circuit is very compact and it can find utilization for the VLSI implementation of membership functions in fuzzy controls and for piecewise linear approximation.<>