Novel reversible CLA, optimized RCA and parallel adder/subtractor circuits
| Autor: | Gharajeh Mohammad Samadi, Haghparast Majid |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Serbian Journal of Electrical Engineering, Vol 17, Iss 3, Pp 259-283 (2020) |
| Druh dokumentu: | article |
| ISSN: | 1451-4869 2217-7183 |
| DOI: | 10.2298/SJEE2003259G |
| Popis: | This paper proposes reversible circuit designs of the three most commonly used adders: carry look-ahead adder (CLA adder), ripple carry adder (RCA adder), and parallel adder/subtractor. The n-bit reversible CLA adder, called CLA-GH, is designed using the Peres and Fredkin gates. The n-bit optimized reversible RCA adder, called ORCA-GH, is designed using the reversible circuit of a parity-preserving reversible full adder. Both circuits reduce the quantum cost. However, the ORCA-GH circuit also improves the number of constant inputs. Furthermore, the n-bit reversible parallel adder/subtractor, called PAS-GH, is designed using the Feynman, Peres, and Fredkin gates. It decreases the number of garbage outputs and quantum cost. The transistor realizations of the CLA-GH and PAS-GH circuits are provided accordingly. The evaluation results indicate that the proposed circuits surpass the existing works in all figures of merit. |
| Databáze: | Directory of Open Access Journals |
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