Design and simulation of logic gates using single electron transistors at room temperature

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The Single Electron Transistor (SET) is a nanoscale three terminal device that provides current conduction characteristics comparable to a MOSFET and can be used for developing nanoscale logic circuits. In this paper, we have determined the design parameters of an SET to observe current oscillations at room temperature. These parameters have been used to design SET-based logic gates for room temperature operation. The circuit architectures of the proposed SET-based logic gates are identical to the corresponding CMOS gates. Complementary operations of an SET as n- and p-type devices were achieved by controlling the charge on the SET island by using the appropriate tuning gate voltages. We have proposed room temperature designs for the NOT, NOR, NAND, And-Or-Invert (AOI) and Or-And-Invert (OAI) gates. Their operations have been verified by simulations with a SPICE package which includes the SET-SPICE model.