A versatile low-voltage CMOS circuit with a trapezoidal transconductance characteristic and independently programmable slope, height and horizontal position is designed in 0.18[Formula: see text][Formula: see text]m standard CMOS technology. The proposed circuit is constructed from combination of two linearization methods to enhance the linearity in low voltage applications. A [Formula: see text]118[Formula: see text]dB THD was obtained for a 400[Formula: see text]mV peak to peak differential input voltage at 125[Formula: see text]KHz. Simulation results using HSPICE that verify the functionality of circuit with 1.5[Formula: see text]V supply are presented. The total power consumption is only 120[Formula: see text][Formula: see text]W. The circuit can find application in the implementation of membership functions in analogue and mixed-signal neuro-fuzzy systems.
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