Design of Ring and Johnson Counter in a Single Reconfigurable Logic Circuit in Quantum Dot Cellular Automata
Angshuman Khan, Ratna Chakrabarty · Zenodo (CERN European Organization for Nuclear Research) · 2013
Quantum Dot Cellular Automata (QCA) is an emerging nanotechnology in the field of nanoscience for the low power consumption and high speed of operational phenomenon. Such type of circuit can be used in many digital applications in sequential and combinational mode of operation, where we are restricted to use different circuits for different digital logic and applications. Reconfigurable QCA mean one circuit can be used for different outputs. Reconfigurable hardware using FPGA are used by different technologist for some digital applications. But FPGA has some limitations in different type of applications such as it has limited size and least efficient use in wire connections. Using QCA a Reconfigurable counter is a new and a novel idea in the field of Nano electronics. In this paper the two most important counters Ring and Johnson counter are designed in the same circuit using QCA and the corresponding simulations are shown with the help of QCADesigner tool. The circuit acts as a Ring counter when the control logic is ‘1000’ and acts as a Johnson counter when the control logic is ‘0111’.So, a single QCA circuit have the twin digital logics with the help of a control signal.