Open AccessA new coplanar design of a 4‐bit ripple carry adder based on quantum‐dot cellular automata technology
Author(s) -
Seyedi Saeid,
Pourghebleh Behrouz,
Jafari Navimipour Nima
Publication year - 2022
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
eISSN - 1751-8598
pISSN - 1751-858X
DOI - 10.1049/cds2.12083
Subject(s) - adder , quantum dot cellular automaton , computer science , carry (investment) , cellular automaton , electronic circuit , carry save adder , correctness , electronic engineering , latency (audio) , electrical engineering , telecommunications , algorithm , engineering , finance , economics
Quantum‐dot cellular automata (QCA) is one of the best methods to implement digital circuits at nanoscale. It has excellent potential with high density, fast switching speed, and low energy consumption. Researchers have emphasized reducing the number of gates, the delay, and the cell count in QCA technology. In addition, a ripple carry adder (RCA) is a circuit in which each full adder's carry‐out is the connection for the next full adder's carry‐in. These types of adders are quite simple and easily expandable to any desired size. However, they are relatively slow because carries may broadcast across the entire adder. Therefore, an RCA design on a nanoscale QCA is proposed to diminish the cell number, improve complexity, and decrease latency. The QCADesigner simulation tool is used to verify the correctness of the suggested circuit. The comparison results for the design indicate an approximately 49.14% improvement in cell number and 14.29% advantage in area for the state‐of‐the‐art 4‐bit RCA designs with QCA technology. In addition, the obtained results specify the effectiveness of the offered design.