Publication

Abstract : The three valued prototype of QCA (Quantum dot Cellular Automata) – ternary QCA or tQCA has become a remarkable paradigm to implement digital logic like the previous prototype of QCA – bQCA. The power dissipation in logic transfer which is an important factor to ascertain the performance of any technology is also important for tQCA and bQCA. Though, estimation of power dissipation in bQCA is quite found in literature, evaluation of power dissipation in tQCA has not made its mark yet. Therefore, in this work we have proposed a novel methodology to estimate power dissipation in tQCA cell during its logic transfer and have also proposed a tQCA electrical model. On testing our tQCA model in SPICE, we have obtained efficient logic transfer from cell to cell within tQCA wire with a very nominal power dissipation of 388.6 fW (femto-watt ~10E-15 watts). The proposed methodology helped us to determine the range of power dissipation in tQCA cell for a particular material at room temperature. Thereby, we could conclude from our obtained results that tQCA technology is quite superior over bQCA in terms of performance.