Title | Quantum-dot cellular automata adders |
Publication Type | Conference Paper |
Year of Publication | 2003 |
Authors | Wang, W., K. Walus, and G. A. Jullien |
Conference Name | Nanotechnology, 2003. IEEE-Nano 2003. 2003 3rd IEEE Conference on |
Pagination | 461 - 464 vol.2 |
Date Published | aug. |
Keywords | adders, algorithm, carry logic, cellular automata, four bit adder, hardware, inverters, logic gates, majority gates, parallel structure, quantum dot cellular automata adders structure, quantum dots, quantum well devices |
Abstract | In this paper, a novel quantum-dot cellular automata (QCA) adder design is presented that reduces the number of QCA cells compared to previously reported designs. The proposed one-bit QCA adder structure is based on a new algorithm that requires only three majority gates and two inverters for the QCA addition. By connecting n one-bit QCA adders, we can obtain an n-bit carry look-ahead adder with the reduced hardware while retaining the simple clocking scheme and parallel structure of the original carry look-ahead approach. The proposed adder is designed and simulated using the QCA Designer tool for the four-bit adder case. The proposed design requires only about 70% of the hardware compared to previous designs with the same speed and clocking performance. |
URL | http://dx.doi.org/10.1109/NANO.2003.1231818 |
DOI | 10.1109/NANO.2003.1231818 |