QCA based cost efficient coplanar 1 × 4 RAM design with set/reset ability

Abstract

In this paper, a loop based coplanar random access memory (RAM) cell with set/reset ability using quantum-dot cellular automata (QCA) technology is first proposed. The operation of the RAM cell is validated physically as well as by simulations using QCADesigner tool. The energy dissipation analysis of the proposed RAM cell demonstrates that the proposed design dissipates very low energy. Additionally, the fault tolerance to single cell missing and addition defects of the proposed RAM cell is also presented. Further, we designed a coplanar 1 × 4 RAM which consists of four proposed RAM cells, one 2:4 decoder and one 5-input majority voter along with the control signals required for the proper operation of the RAM. The proposed RAM cell and 1 × 4 RAM designs achieve performance improvement of up to 88.16% and 79.28%, respectively from the existing design in terms of QCA circuit cost. These structures can therefore be used to design efficient higher order RAM structures. © 2021 John Wiley & Sons Ltd.