QQCAsim: a new simulation tool for quaternary logic in QCA technology

Document Type : Article


Department of Electrical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran


Quantum-dot cellular automata (QCA) technology is one of the candidate technologies to replace CMOS in multi-valued logic (MVL) circuit designs, with the aim of overcoming the problems of binary systems. One of the advantages of MVL systems is that they can process more information. Some techniques are essential to simulate and evaluate new multi-valued designs and their performance. This article introduces a new software platform for simulating quaternary QCA (QQCA) circuits that can be run on computers under Windows and Linux. This simulator is powerful and can run simulations with high accuracy. The presented tool provides the results in two formats. The first format is waveform and the second one is truth table. The presented software has a user-friendly interface that allows the users to easily implement their QQCA circuits. Furthermore, the electrostatic energies for all cases in which the basic gates assume four values are determined and the step-by-step simulation process is described. The basic NOT, AND, and OR gates have already been simulated and validated by the relevant software.


Main Subjects