• M.L.N. Manohar
• K. Rama Subbarao
• A. Uday Shankar
• M . George Paulson
• K.Seeta Rama Raju

Quantum-dot cellular automata (QCA) are one of the most promising emerging Nano electronic paradigms used for designing computers and very large-scale integration circuits. Many applications can tolerate the errors and imprecision of digital systems; thus, approximate computing is widely used in such cases. Exclusive OR (XOR) gates are among the major gates, based on which other gates could be developed. A three-input XOR gate is considered to be a basic gate in designing compressors as one of the most important parts of the arithmetic logic unit. Several studies have focused on the accuracy of XOR gate in the QCA technology. However, using approximation in designing XOR gates remains a significant concern in this regard. To the best of our knowledge, the present study is the first to introduce a novel three-input approximate XOR gate. This gate is utilized in designing approximate 4-2 compressors for reducing circuit complexity, which can be achieved by the minimum number of the gates It is a fundamental building block in many circuits, such as adders, comparators, parity checkers, multipliers, error detectors and another kind of circuits as well. In this paper, a new low-complexity single layer XOR gate is presented in QCA technology. Implementation of the gate is based on explicit interaction cell. Hence, it is not required any special equation or technique in its construction. Overall results show that the proposed gate performs better in a case of previous XOR designs.

QCA Technique, Compressors, Quantum computing.

"Implementation of logic gates using quantum dot cell automata", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.626-635, April-2019, Available :http://www.jetir.org/papers/JETIR1904993.pdf

"Implementation of logic gates using quantum dot cell automata", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp626-635, April-2019, Available at : http://www.jetir.org/papers/JETIR1904993.pdf