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Simple, compact low-cost microwave bandpass filters with strongly asymmetric characteristics, based on new topologies, are investigated, designed, fabricated and measured. A classical fourth-order filter or quadruplet, for example, has two transmission zeros located symmetrically, one on each side of the passband. A filter of the same order and, consequently, with a similar insertion loss, can offer...
This paper considers a size constrained version of the undirected feedback vertex set problem motivated by placing wavelength converters on a WDM network efficiently, and proves that this problem is NP-complete even in several special cases. Moreover, the paper presents a simple approximation algorithm for a minimization version of the problem using an algorithm for the original minimum undirected...
In this work, an attempt is made toward the development of a systematic design method for the performance-driven dimensioning of the various elements comprising the structure of modern transistor-based microwave injection-locked oscillators with transmission-type topologies (TILOs). The proposed approach is based on the use of appropriate diakoptics of the various circuit blocks into a matched environment,...
A systematic design methodology for low-noise amplifiers (LNAs) is introduced. This methodology follows a bottom-up approach that employs a multi-objective evolutionary optimization algorithm, which is used at two levels. First, it is used to generate Pareto-based performance models for integrated planar inductors. To do so, an electromagnetic simulator that takes into account the inductor's layout,...
In this work, design of low-voltage low-power analog artificial neural network (ANN) circuit blocks by using subthreshold floating-gate MOS (FGMOS) transistors and a neuron circuit is implemented. The circuit blocks, four-quadrant analog current multiplier and FGMOS based differential pair, have been designed and simulated in CADENCE environment with TSMC 0.35μm process parameters. Using the proposed...
Complexity theory typically studies the complexity of computing a function h(x) : {0, 1}m → {0,1}n of a given input x. We advocate the study of the complexity of generating the distribution h(x) for uniform x, given random bits. Our main results are: (1) Any function f : {0, 1}ℓ → {0,1}n such that (i) each output bit fi depends on o(log n) input bits, and (ii) ℓ ≤ log2 (αnn) + n0.99, has output distribution...
In earlier, Fault Analysis (FA) has been exploited for several aspects of analog and digital testing. These include, test development, Design for Test (DFT) schemes qualification, and fault grading. Higher quality fault analysis will reduce the number of defective chips that slip past the tests and end up in customer's systems. This is commonly referred to as defective parts per million (DPM) that...
In this paper, we use a modified version of the incidence matrix of an un-oriented graph so as to enumerate all the spanning trees. In particular, we formally describe the problem and then enumerate the spanning trees, also Showing how to use this method in finding the symbolic determinant of a passive circuit.
The ion chromatography instrument is one kind of complex chemical analysis instruments. And the key part that affects analysis results in it is ion chromatographic column. On developing online IC instrument, it is difficult to predict the efficiency of IC column. All the instruments can be referred now are only used in laboratory, and the column efficiency is judged artificially. So it is necessary...
The paper deals with the implementation of multi-domain symbolic analysis in a new program, SAMD (Symbolic Analysis of Mechatronic Drives), developed with the emphasis on linearized hybrid systems combining classical electrical circuits, controllers, electro-mechanical converters and mechanical parts of electric drives. The systems analyzed can be composed of both basic elements and more complex blocks...
This paper presents an extended CAD tool compatible with decananometric technologies for sizing OTA architectures. This is based on an extension of the gm/I methodology which uses, as inputs, parameters directly extracted from foundry models and can hence be easily ported to different technologies. This tool was developed in order to fasten and automate design for each OTA architecture. From fixed...
Due to the excellent control of DG MOSFETs over the short channel effects, they have been considered as a leading candidate to extend the scaling limit of conventional bulk MOSFETs. However, the hot carrier injection into gate oxides remains a potential problem in reliability field hence altering the device lifetime. In the present paper, a comprehensive drain current model incorporating hot-carrier-induced...
This paper represents a systematic procedure of simulating charge pump based delay locked loops (DLLs). The presented procedure is based on the systematic modelling of the DLL components in Matlab simulink simulator. The system has been designed for 1Hz input clock signal that by changing the whole system scale, it can be used for every other input frequencies. The simulation results in Matlab and...
It's widely recognized that Gate-All-Around (GAA) MOSFETs are considered among the most probable choices to continue CMOS performance boost beyond the conventional scaling frontiers. Such device offers the best controllability of short-channel effects claimed to be the predominant factor limiting how far the downscaling can be achieved. However, the lack of analytic compact models for degraded drain...
During analog circuit synthesis in nanometer technology, process variability analysis is mandatory during design space exploration. This would ensure that the circuit will function as per specifications after fabrication even with impact of statistical variations in nanometer regimes. The methodology necessitates the evaluation of performance metrics of an analog circuit for different sizing instances...
New analytical equations are proposed for oscillation amplitude of the MOS Colpitts oscillator. These equations are obtained from a large signal analysis. The analysis is based on a reasonable estimation for the output waveform. The estimated waveform should satisfy the nonlinear differential equations governing the circuit. The validity of the resulted equations is verified through simulations using...
This paper presents a methodology to design and to optimize inductive power link for biomedical applications. The importance of the operation frequency on the application is expressed. A model of inductive link is presented. The dimensions of the coils are compatible with the size of a mouse and the mouse cage. The simulation results are in good agreement with the analysis.
This paper deals with the use of the integrated circuit electromagnetic model (ICEM) to analyze, predict, and optimize auto compatibility and electromagnetic emission at PCB level. ICEM is currently under standardization process (IEC62014-3). The basic ICEM architecture is composed of a power distribution network model and an internal current source modeling digital activity. Such an approach enables...
The purpose of this work is to optimize the design of an MSK modulator able to operate at a high data modulation. The optimization approach applies an experimental design methodology having in view to minimize the modulator response time. This methodology is traditionally applied by agronomists and chemists. We show how it can be perfectly suited to optimize electronic designs.
Abstract-Advancements in VLSI technology has made it possible to have more than eight metal layers connecting millions of closely placed devices in a single IC chip. Different interconnect layers run across the chip and the necessary connections across the layers are made through vias. The impedance discontinuity at the junction of the via and the interconnect line creates signal reflections and contributes...
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