Fig 13 - uploaded by Pijush Kanti Bhattacharjee
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Full Adder Circuit Diagram by AND-NAND & OR-NOR QCA gates with Three Binary Inputs. the number of gates required and the garbage outputs as clearly described in Table-I. Likewise multiplexer, demultiplexer, encoder (Decimal to Octal, Binary to Hexadecimal etc), decoder, code converter (BCD to Gray, Gray to ASCII etc) and different logic combination functions can be well realized by the adder circuit only.
Source publication
Different logic gates like MV, NOT, AOI, NNI etc under QCA nanotechnology are introduced. NNI gate is highly effective regarding space and speed consideration. Any Boolean functions are synthesized by MV and NNI gates or simply NNI gates alone, eliminating inverter (NOT) gate. A new method for realizing adder circuit in binary reversible logic is i...
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Different logic gates like MV, NOT, AOI, NNI etc under QCA nanotechnology are introduced. NNI gate is highly effective regarding space and speed consideration. Any Boolean functions, confined in thirteen number standard Boolean functions, are synthesized by MV and NNI gates or simply NNI gates alone, eliminating inverter (NOT) gate. A new method fo...
Quantum-dot cellular automata (QCA) technology leads to rapid high-density combinatory low power exploitation to realize the reversible logic circuit in the nanoscale era. Reversible logic is an alternative to overcome excess energy indulgence of irreversible process. This paper illustrates a cost-effective, energy-efficient Universal Reversible Lo...
Citations
... In 2010, Pijush Kanti Bhattacharjee et al. [24] proposed to use AND-NAND (A-NA) and OR-NOR (O-NO) gates designed by QCA and compared it to conventional gates such as AND, OR, EX-OR, CMOS gates. The layout of the adder circuit is simple to understand with a minimum number of gates, particularly with A-NA and O-NO gates, using QCA technology. ...
As the human ken and comprehension about esoteric and arcane phenomenon develops; from space to the sub-atomic level, the passion to further explore the unexplored domains and dimensions boosts the human advancement in a cyclic affect. A significant part of such passion follows in the electronics industry. Immense research and experiments due same vigor led to the evolving nanotechnology and a feasible alternative to Complementary Metal Oxide Semiconductor (CMOS): The quantum-dot cellular automata (QCA). QCA is a dynamic computational transistor paradigm that addresses device density, power, operating frequency and interconnection problems. Scaling the devices can reduce the power consumption of the MOS technology device. The technology is also viable for the current demand of ultra-high-speed (THz) functioning. With Moore's law reaching the practical and inevitable limitations as a consequence of a classical approach of CMOS technology, the need of a more dexterous and effective technology approaches rapidly. One such technology that comes to the rescue is the Quantum-dot Cellular Automaton. Quantum dots are nanostructures made from semi-conductive conventional materials. It is possible to model these constructions as 3-dimensional quantum energy wells. As a result, even at distances several hundred times larger than the constant lattice of the material system, they exhibit energy quantization effects. Logical operations and data movement are performed exploiting columbic interaction between nearby QCA cells instead of present flow. It is possible to visualize a quantum dot as a well. Once trapped inside the dot, electrons do not have enough energy needed to tunnel the wells. The main focus of this review paper is to study the trends which are proposed to design various digital circuits.
... NNI gate and simulation result[7] ...
Quantum-Dot Cellular Automata (QCA) is a promising technology for designing high-performance and efficient logic circuits, surpassing traditional Complementary Metal Oxide Semiconductor approaches. In today’s digital era, the demand for digital circuits with high speed, device density, and energy efficiency is paramount. This paper focuses on the innovative Rotated Normal Cells with Displacement (RND) inverter model, employing normal and rotated cells with a 10 nm displacement through a cell interactive method. Digital circuits designed using the RND inverter exhibit superior performance compared to existing designs. The proposed RND inverter gate utilizes only four QCA cells, occupying a total area of 4525.55 nm². With a total energy dissipation of 0.508 meV and an average energy dissipation per cycle of 0.0462 meV, it achieves a polarization of 9.77. The novel RND inverter demonstrates a 44% improvement in cell area and a 63% reduction in total area compared to current designs, offering enhanced energy efficiency with 0.26 improved polarization. The RND inverter and the digital circuits facilitate finding applications in efficiently constructing various components within Quantum Computers. Beyond quantum computing, the RND inverter proves applicable in designing Nano-sized electronic gadgets and temperature-controlled circuits, showcasing its versatility across diverse technological applications.
Quantum dot Cellular Automata (QCA) offers a new transistorless computing paradigm in nanotechnology. It has the potential for attractive features such as faster speed, smaller size and low power consumption than transistor based technology. By taking the advantages of QCA we are able to design interesting computational architecture. The basic logic elements used in this technology are the inverter and the majority gate (MG). The majority gate is not a universal gate. Hence another important logic gate introduced in this technology is And-Or-Inverter (AOI). In this paper, we propose design of different logical structures using AOI. The rules are introduced in this paper for easy implementation of AOI circuits for different functions and characteristics of AOI is also defined and analyzed. Design implementations using the AOI gate are compared with the conventional CMOS and majority gate based QCA methodology.
