the full adders (fas) constitute the essential elements of digital systems, in a sense that they affect the circuit parameters of such systems. with respect to the mosfet restrictions, its replacement by new devices and technologies is inevitable. qca is one of the accomplishments in nanotechnology nominated as the candidate for mosfet replacement. in this article 4 new layouts are presented fo...

The Full Adders (FAs) constitute the essential elements of digital systems, in a sense that they affect the circuit parameters of such systems. With respect to the MOSFET restrictions, its replacement by new devices and technologies is inevitable. QCA is one of the accomplishments in nanotechnology nominated as the candidate for MOSFET replacement. In this article 4 new layouts are presente...

Circuit design in deep sub-micron technologies requires that designers deal with numerous data, constraints, analysis, synthesis, and optimization tools. Although synthesis tools are widely used at Intel, new circuit technologies are evolving and are often not well supported by existing synthesis tools. Deep sub-micron technology requires that the impact of physical design be considered early i...

Process disturbances during the manufacture of an integrated circuit cause the fabricated circuit to vary from the design specifications. In some cases the variations are such that circuit faults result. The relationship between circuit faults and process disturbances is of interest because some applications such as yield prediction require information about what circuit faults are caused by a ...

Micromachining techniques are being increasingly used to develop miniaturized sensor and actuator systems. These system designs tend to be captured as layout, requiring extraction of the equivalent microelectromechanical circuit as a necessary step for design verification. This paper presents an extraction methodology to (re-)construct a circuit schematic representation from the layout, enablin...

quantum-dot cellular automata (qca) is an emerging and promising technology that provides significant improvements over cmos. recently qca has been advocated as an applicant for implementing reversible circuits. however qca, like other nanotechnologies, suffers from a high fault rate. the main purpose of this paper is to develop a fault tolerant model of qca circuits by redundancy in hardware a...

| A new approach for the minimum area oorplanning is proposed where the shape of every module can vary under the constraint of area and oorplan topology. Simulating the air-pressure mechanics, the algorithms iterate to improve the layout to decide the shapes and positions of modules. It is proved that the layout approaches the optimal layout each step by the measure of energy which is de ned by...

This paper presents a Web-based graphical tool that makes it possible to view and simulate a working circuit at the layout level. This tool allows one to observe changes in logical levels with a dynamic alteration of the color properties of the graphical elements that characterize the circuit at layout level. The layout view changes colors in function of logic level changes. Two aspects of the ...