Design of QCA based N-bit single layer shift register using efficient JK Flip Flop for nano-communication applications

Quantum-dot Cellular Automata (QCA) is a technology that has the potential to create nano communication systems that are both highly efficient in power consumption and compact in size When compared to CMOS enabled electronic devices, QCA can achieve faster operation speed, higher density and lower power dissipation which becomes a boon, in digital logic design. In this paper, proposed work of designing sequential circuits using QCA has been achieved. An efficient JK flip-flop design along with 2-bit, 3-bit, 4-bit and 8-bit shift registers which can be further scaled up to N-bits using the same proposed design of flip-flop is observed. Also, the fault tolerance of proposed JK flip-flop design against single cell addition and deletion defects are presented in this paper. After conducting a performance comparison and thorough analysis of energy dissipation, it has been determined that the proposed designs bear lower cost and lower energy dissipations. Using QCADesigner tool, the validation of functions and processes of all proposed sequential designs has been done accordingly.