On the realization of Gaussian membership function circuit operating in saturation region

In this paper a novel method for realization of Gaussian function is presented. The current-mode circuits are employed for the implementation of main circuits owing to the simple circuitry and intuitive configuration. Unlike the previous works which were based on the transistors worked in weak inversion region, the proposed configuration operates in the saturation region, therefore high-accuracy as well as the highspeed performance are obtained. The proposed circuit is fully programmable in terms of mean value, standard deviation and peak gain of the Gaussian function. Simulation results of the circuit is obtained by HSPICE with TSMC level 49 (BSIM3v3) parametes in 0.35μm standard CMOS process.