Design of non‐restoring binary array divider in quantum‐dot cellular automata

Abstract

Quantum-dot cellular automata (QCA), a promising candidate nanotechnology for the next generation computers, has attracted the interest of researchers all over the world since 1993. The divider is a major component of arithmetic logic unit, which has a remarkable impact on the performance of the central processing unit. The widely used algorithm in the divider is the non-restoring division, but there is no work which has reported the implementation of non-restoring dividers based on QCA. Presented is the design of a non-restoring binary array divider in QCA and its validity is verified using QCADesigner software. The proposed non-restoring divider has the advantage of time-saving and is easy to control when compared with the existing restoring dividers.

Design of non‐restoring binary array divider in majority logic‐based QCA

“…Comparison results: The comparison results of existing and proposed QCA dividers are shown in Table 4. It can be perceived that the proposed structure excels all the best reported designs presented in [6,11,12]. The proposed 4 × 4 divider achieves 38 and 63% improvements in latency and area occupation, respectively, when compared with the best results.…”

“…All the computations and data propagations are done by a four-phased clocking scheme. Different QCA-based arithmetic logic circuits have been discussed in several works [1][2][3][4][5][6][7][8][9][10][11][12][13]. Among these, the design of dividers is the major concern as it has a great impact on the overall performance of any processing unit.…”

An efficient design of adder/subtractor circuit using quantum dot cellular automata

“…QCA is an excellent nomenclature and effective approach to gain success effectively [3,5]. The acquisition of the proposed prevalent architecture is really widespread and extensive because we can easily implement the proposed designs in QCA other logical circuits like QCA multipliers [12], QCA dividers [13], QCA processors [14] and many more areas.…”

QCA circuit design of n ‐bit non‐restoring binary array divider

“…However, due to the major impact of the divider circuits on the overall performance of any arithmetic processor, they are the most complicated units. Different QCA designs for divider circuits such as restoring binary array divider (RD) [12–14] and non‐restoring divider (NRD) [14–17] have been proposed. The designs of NRDs show that they are better compared to RDs because of the drawbacks of RDs such as resorting process and realising control logic, which cause more delay, unnecessary power dissipation, and larger sizes.…”

“…In the literature, several QCA‐based circuits for the non‐restoring binary array divider have been introduced based on different techniques [14–17]. The dividers in [14, 15, 17] were designed with a single‐layer QCA as in [15] or multi‐layer as in [14, 17] based on only majority gates and inverters. Recently, a QCA design for NRD was proposed based on the QCA structure of the XOR function [16].…”