Design of a Controllable Adder-Subtractor circuit using Quantum Dot Cellular Automata

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Design of a Controllable Adder-Subtractor circuit using Quantum Dot Cellular Automata

Journal Title: IOSR Journals (IOSR Journal of Electrical and Electronics Engineering) - Year 2017, Vol 12, Issue 4

Abstract

Quantum Dot Cellular Automata (QCA) is a new paradigm in Nanotechnology that has grown much interest in the past few years. As the digital circuit’s dimension have been reducing at a fast pace, basic components of a CMOS based transistor less circuit size has to be decreased accordingly. But it leads to certain unavoidable problems. Here comes the benefit of QCA, as it can be used efficiently in far smaller chips. This paper proposed a new concept of Controllable Layered Adder and Subtractor circuit which is the basic building block of any arithmetic and logic design using QCA. The design specifies that without making any changes the same circuit provides two different outputs by the application of different clock pulses to a particular cell. Proposed design idea is suitable for Adder and Subtractor designs where combine output is required in nano scale level. The design approach is applied in a two bit multiplier based ALU circuit as an application. Estimation of Kink Energy, effective area, Operation cost, Area Utilization Factor and latency has been done to the circuits.

Authors and Affiliations

Ratna Chakrabarty, N K Mandal

Keywords

EP ID EP388242
DOI 10.9790/1676-1204034459.
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