This paper introduces a new design of penternary inverter gate based on graphene nanoribbon field effect transistor (GNRFET). The penternary logic is one of Multiple-valued logic (MVL) circuits which are the best substitute for binary logic because of its low power-delay product (PDP) resulting from reduced complexity of interconnects and chip area. GNRFET is preferred over Si-MOSFET for circuit design due to its fantastic thermal, mechanical and electrical properties. For this circuit design, the voltage divisions obtained with resistors. All the circuits are simulated and compared by HSPICE, 15nm GNR Technology with the supply voltage of 0.8V. Simulation results demonstrate that the PDP is about 1e-18. Therefore, MVL design based on GNRFET leads to minimum PDP than other devices such as CNTFET. Furthermore, the transient wave is absolutely accurate. The variation of the figure of merits (FOM) such as power consumption, propagation delay, and PDP is investigated as a function of a number of the ribbon in GNRFET structure. تفاصيل المقالة

The quantum-dot cellular automata (QCA) is considered as an alternative to
complementary metal oxide semiconductor (CMOS) technology based on physical
phenomena like Coulomb interaction to overcome the physical limitations of this
technology. The decoder is one of the important components in digital circuits, which
can be used in more comprehensive circuits such as full adders and memories. This
paper proposes the 2:4 decoder using multilayer QCA technology. The multilayer
decoder provides requirements of high-density devices with good computing power.
The proposed 2:4 active high decoder reduces the clock phases to three, making the
circuit faster than previous ones. Moreover, the number of cells and occupied space are
significantly reduced, thus reducing power consumption. Multi-layer architecture has
more reliability than coplanar architecture and allows for the easy layout change. The
structure was simulated using QCA Designer software, and the simplified expressions
and standard functions have been presented. The simulation results can be useful for
using them in logic circuits. تفاصيل المقالة