Adders are the most fundamental arithmetic circuits that are used in processors and play key role in VLSI circuits. Power consumption and speed of these circuits are important quality factors for high performance integrated processing circuits. Floating-point operators, integer multipliers, and modular adders need large adders. On the other hand, Field programmable gate arrays (FPGAs) due to th...

An SPICE compatible model for multiple coupled nonuniform lossless transmission lines (TL's) is presented. The method of the modeling is based on the steplines approximation of the nonuniform TLs and quasi-TEM assumptions. Using steplines approximation the system of coupled nonuniform TLs is subdivided into arbitrary large number of coupled uniform lines (steplines) with different characteristi...

Real defects (e.g., resistive stuck at or bridging faults) in the very large-scale integration (VLSI) circuits cause intermediate voltages which cannot be modeled as ideal shorts. In this paper, we first show that the traditional zero-resistance model is not sufficient for fault simulation. Then, we present a resistive fault model for real defects and use fuzzy logic techniques for fault simula...

This paper tackles the VLSI circuit reverse engineering problem. Actual VLSI circuits are made of several millions of transistors or hundreds of thousands of logical gates. Whether it be for circuit verification, functional abstraction, or simply circuit understanding, reverse engineering aims at building a hierarchy from the transistor level, to gate level, to register level, up to more comple...

An imbedded language system for the hyout of VLSI circuits is examined. It is shown that through the judicious use of this system, a large variety of circuits can be designed with circuit density and performance comparable to traditional full-custom design methods, but with design costs more comparable to semi-custom design methods, The high performance of this methodology is attributable to th...

In this work the different approaches to avoid crosstalk noise in VLSI integrated circuits are presented. The geometry of the cross-section of the lines is one of the more important parameters which must be considered when crosstalk problems are analyzed. Thus depending on this parameter we can select the best rule to avoid signal integrity problems in VLSI circuits. Several structures will be ...

One major concern in the design of Very-Large-Scale Integrated (VLSI) circuits is debugging as design size and complexity increase. Automation of the debugging process helps to decrease the development cycle of VLSI circuits and consequently to achieve a higher productivity. This paper presents an approach to automatically debug timing bugs at the design step. The approach utilizes Boolean Sati...

The ever increasing speed of data transmission especially in optical channels, in magnetic recording devices and in wireless links makes it necessary to look at new receiver structures which are capable of high speed processing at low power consumption. Analog, nonlinear and highly parallel operating circuits can perform the task of equalization, differential detection, channel decoding and in ...

The theory and practice of log-domain filter design has reached the point where it is possible to incorporate log-domain filter structures into large current-mode VLSI systems. We report on interface circuits used to implement a current-mode frontend filterbank and feature extractor for acoustic pattern recognition. These circuits maintain a log-domain structure, acting on the unexpanded filter...

Decompositions of inter-connected components, to achieve modular independence, poses the major problem in VLSI circuit partitioning. This problem is intractable in nature, Solutions of these problem in computational science is possible through appropriate heuristics. Reduction of cost that occurs due to interconnectivity between several VLSI components is referred in this paper. Modification of...