In PCs, the number of arithmetic operations, the comparator is a vital equipment unit, consisting of complementary metal-oxide-semiconductor (CMOS) technology. Another procedure, referred to as Quantum Cellular Automata (QCA) will supplant the CMOS outlines, having leverage concerning zone, control utilization, and latency. The primary QCA circuits planned with the inverter and majority voter entryways. In this paper, we utilize the clocking method 180 out of phase clock crossover to outline the 1-bit comparator and compare with the current outcomes.The new proposed wire crossing plan lessens the quantity of cells required to configuration, power and area necessities. Additionally, we planned 2-bit comparator having 11 majority gates (voters), 2 number of crossovers with 0.38 µm 2 area, 203 number of cells. The designed 1-bit comparator contrast and the past outcomes where cells, region, delay demonstrates 53.57 %, 50 % and 33.32 % improvement respectively.
Observation of terminal atom effect in molecule NH 2 -Cn-NO 2 placed between gold electrodes with end atom sulfur and hydrogen studied using Hartree-Fock theory method. The conductance in molecule exponentially decreases with increases in the number of carbon connectors. Observed that the coupling between the molecule and the two electrodes and the energy gap between the highest occupied molecular orbital and the lowest unoccupied molecular orbital of the molecule dominate the transport property of the current.
The Electrical rectification properties of an asymmetric molecule's amine group and nitro group has been studied by placing the compound between two gold electrodes and using Extended Hückel, Parametric and non-equilibrium Green's function (NEGF) formalisms.The conductance of the device falls exponentially with an increased number of CH 2 moieties in the molecule. Current rectification was observed based on HOMO, LUMO gaps and potential drop across the molecules. The investigation of the spatial dispersion of frontier orbitals, the highest occupied molecular orbitals, lowest unoccupied molecular (HOMO-LUMO) of the molecule command the transmission of electrons in the molecule. The results demonstrate that, depending on the group of molecules and number of CH 2 moieties present, current shipping from left side of device to right side of device based on orbital energy gaps. Our findings demonstrate that a true molecular diode can be created, and thus miniaturize the electronic circuit's size to the Nano scale.
The electronic transport properties of electrons in a molecules are observed by using Non equilibrium Green's function(NEGF). We present a extremely through and careful computational approach well ordered method to do a framework analysis of donor (CH3) and acceptor (CN) molecules connected between the Au(111) contacts, and also observed current progress through molecular devices depends on number of bonds or not. Such observations implementation through not possible by standard quantum chemistry soft wares. The results shows I-V characteristics, Transport spectrum and Transport analysis can effectively tune the molecules works like a conventional semiconductor based diodes, these results invoke to design the logic gates and logic circuits.
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