Design of Area Efficient Shift Register and Scan Flip-Flop based on QCA Technology

Abstract

A growing substitute to the CMOS technology to structure the digital circuits is Quantum-dot Cellular Automata (QCA) Technology. The future nano digital circuits using QCA technology are very advantageous in context to low power consumption, device density, and speed. The standard logic elements in QCA are Majority Gate (MG) and Inverter. This paper presents a 5-input MG based logic circuits. The 3-input MG has some demerits; mainly, it needs more gates to implement complex functions. The high-level synthesis circuits such as multiplexer, shift register, and scan Flip-flops are implemented using the 5-input MG. The proposed circuits are advantages in terms of various circuit parameters such as cell counts, area, and gate count compared to the previous circuits implemented with 3-input MG.