A novel design of quantum dot cellular automata 5-input majority gate with some physical proofs

Abstract

In a very fast growth of very large scale integration (VLSI) technology, it is the demand and necessity of time to achieve a reliable design with low power consumption. The quantum dot cellular automata (QCA), due to its small size, very high switching speed and ultra-low power consumption, can be an alternative for CMOS VLSI technology at nano-scale level. A novel 5-input majority gate for QCA is proposed in this paper which is suitable for designing QCA circuits in a simple and symmetric manner. Based on it, we have designed a full adder with some physical proofs provided for the functions of Boolean techniques to verify the functionality of the proposed devices properly. For computer simulations analysis, functionality of full adder has been checked using the QCADesigner tool. Both simulation results and physical proofs confirm the usefulness of our proposed gate design for designing any digital circuit.

Novel single layer fault tolerance RCA construction for QCA technology

“…The area is 0.08 µm 2 and delay is two clock phases. Kassa and Nagaria [25] have presented 1-bit FA that utilizes one 3-input MG, one 5-input MG and one IG. This 1-bit FA has 0.05 µm 2 area, 48 QCA cells and three clock phases delay.…”

“…This 1-bit FA has 0.05 µm 2 area, 48 QCA cells and three clock phases delay. The fault tolerance for the sum output and carry output are 17.94% and 92.30%, respectively in [25]. Hayati and Rezaei [21] have proposed 1-bit FA that utilizes three 3-input MGs and one IG.…”

“…Table 4 shows the comparison of the 1-bit QCA FT FA constructers. The cost is calculated as follows: Cost=Area (μm 2 ) × Delay (clock phase) (6) The comparison results between the proposed 1-bit QCA FT FA and other 1-bit QCA FA constructions show that although fault tolerance of the carry output in our design is lesser than the fault tolerance of the carry output in [42,25], but the fault tolerance of the sum output in the proposed 1-bit QCA FT FA has improved compared to [42,25]. In addition, the proposed 1-bit QCA FT FA has significant improvement in comparison with [42] in terms of area, and cost by about 50% and 50%, respectively.…”

Energy Efficient Novel Design of Static Random Access Memory Memory Cell in Quantum-dot Cellular Automata Approach

“…By tunneling these electrons, mutual electrostatic repulsive force is created between them and as a result, one gets either logic 0 or logic 1. QCA Inverter and Majority gate are the primary gates for building any QCA based logic circuits [6,7]. Figure 1 shows the QCA cell, QCA inverter and QCA wire while Figure 2 shows the Original, Rotated and 5-input majority gate consequently.…”

Novel and Reliable Design of 5-input Majority Gate in Quantum-dot Cellular Automata Approach

“…(b) Figure 2. QCA (a) Inverter (b) Majority Gate RMG gate can be a very good option sometimes compared to OMG gate and if we utilize both of them very effectively, we can get good circuit design with very less area and energy [12][13]. In this presentation, we have given mathematical proof for RMG gate as well as made a new 5-input MG which is a novel first design of its kind utilizing 12 number of QCA cells in its structure.…”