An Efficient Design for Coplanar Ripple Carry Adder in Quantum-dot Cellular Automata Technology
| Authors | Zahra Dadgar, Abdalhossein Rezai |
| Affiliations |
ACECR Institute of Higher Education, Isfahan branch, Isfahan 84175-443, Iran |
| Е-mail | rezaie@acecr.ac.ir |
| Issue | Volume 11, Year 2019, Number 3 |
| Dates | Received 28 November 2018; revised manuscript received 14 June 2019; published online 25 June 2019 |
| Citation | Zahra Dadgar, Abdalhossein Rezai, J. Nano- Electron. Phys. 11 No 3, 03034 (2019) |
| DOI | https://doi.org/10.21272/jnep.11(3).03034 |
| PACS Number(s) | 81.07.Ta, 85.35.Be |
| Keywords | Nanoelectronics (3) , Nanotechnology (6) , Ripple carry adder, Full adder (2) , Quantum-dot cellular automata. |
| Annotation |
The new nanotechnology, the Quantum-dot Cellular Automata (QCA) technology, is a promising technology for replacing the conventional CMOS technology at nanoscale. This new technology provides high-speed and extremely dense structures in digital circuits. This study presents new low complexity one-bit QCA Full Adder (FA) structure as a building block. Then, a new high-speed four-bit QCA Ripple Carry Adder (RCA) is proposed using this building block. The QCADesigner tool version 2.0.3 is utilized for verifying circuit functioning. The proposed one-bit QCA FA structure and proposed four-bit QCA RCA structure utilize 47 and 233 cells, respectively. The implementation results show that the proposed structures provide an improvement compared to other structures in terms of latency, area, cell count, and cost. |
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List of References |
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