This paper investigates a novel design of penternary logic gates using
carbon nanotube field effect transistors (CNTFETs). CNTFET is a suitable candidate for
replacing MOSFET with some useful properties, such as the capability of having the
desired threshold voltage by regulating the diameter of the nanotubes. Multiple-valued
logic (MVL) such as ternary, quaternary, and penternary is a promising alternative to
the binary logic design, because of less complexity, less computational step and reduced
chip area. We propose two penternary inverters which are designed in the multiplevalued
voltage mode based on CNTFET. In the first proposed design, the resistors are
used to implement penternary logic whereas, in the second proposed design, they are
replaced with the transistors. Extensive simulation results using HSPICE represent that
the two proposed designs reduce significantly the power consumption and delay and
sensitivity to process variations as compared to the state-of-the-art penternary logic
circuit in the literature. پرونده مقاله