Analog circuits for Gaussian function with improved performance

In this paper two new versions of analog circuits with improved performance are introduced to implement Gaussian Function. They are characterized by low power dissipation, lower mismatching problem, higher tuning ability and larger bandwidth. The FGMOS based Gaussian circuit is designed by replacing the MOSFETs in the conventional CMOS circuit, which are used as variable resistors. Another version of the proposed circuit utilizes the advantage of a resistor to increase the bandwidth of the conventional circuit. The circuits are simulated in TSMC 0.25μm CMOS technology using 3.3V supply on SPICE. The bandwidth of resistively compensated Gaussian circuit is about 278MHz and the power dissipation is reduced upto four times by using FGMOS based Gaussian circuit. The proposed circuits for Gaussian function have wide area of application in neural algorithms and chip fabrication.