Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Macromodel"”.
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Counterbending in a flagellum macromodel
The flagellum is one of the most critical biological compenents in nature; it is a basic feature common to many different types of cells and allows for even the most primitive cells to move around. However, the structure of the flagellum is far from simple. The inner core consists of a 9+2 …
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Modeling and Optimization of the Microwave PCB Interconnects Using Macromodel Techniques
L'abstract è presente nell'allegato / the abstract is in the attachment
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Monolithic finite gain amplifiers employing active voltage attenuators in the feedback and a charge conserving macromodel for MOSFETs
… concentrates on developing a charge conserving macromodel for MOSFETs. The mechanisms which make MOSFET switches inject charge is reviewed. Based on the review and the nature of the parasitic capacitances in the MOSFET, a charge conserving macromodel is developed. This macromodel provides a …
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Nonlinear Dynamics of Circular Plates under Electrical Loadings for Capacitive Micromachined Ultrasonic Transducers (CMUTs)
We created an analytical reduced-order model (macromodel) for an electrically actuated circular plate with an in-plane residual stress for applications in capacitive micromachined ultrasonic transducers (CMUTs). After establishing the equations governing the plate, we discretized the system by …
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Broadband Macromodeling Techniques for Interconnects and Electronic Packages
… are proposed to generate an accurate broadband macromodel for passive interconnect and packages. The physical characteristics of the structures such as stability, causality, and passivity are preserved during the model construction. Also, a new method is formulated based on vector-fitting method …
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Macromodeling and demonstration of the LT6600 amplifier and lowpass filter
… simulation and in the laboratory. The LT6600-10 macromodel and its design methodology is presented, as well as comparisons of macromodel characteristics with measured characteristics of the LT6600-10 IC. For the lab demonstration portion, the LT6600-2.5 was integrated into a digital code-division …
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Measurement, Modeling, and Simulation of Fast Transients in ESD Devices
… ESD protection devices. A circuit simulation macromodel for use in circuit simulation tools has also been incorporated into the Illinois Electrothermal Simulator (iETSIM). A complete discussion of SCRs as ESD protection devices and our measurement/modeling work is given herein.
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Design and Modeling Environment for Nano-Electro-Mechanical Switch (NEMS) Digital Systems
… we derive a SPICE circuit simulation model (Macromodel) that allows the evaluation of the NEMS based systems using fast circuit simulation techniques with the same accuracy of a slow multi-physics 3D Finite Element Analysis (FEA) model. The 3D FEA model is constructed to capture the …
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Bottom-Up High -Level Power Modeling and Estimation
High-level power estimation requires power macromodel for different blocks which are easy to use and automatically constructed. The main contribution of this research is the development of macromodels for average power, energy for every input vector pair (energy per cycle) and peak-current for …
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Efficient and physically consistent electromagnetic macromodeling of high-speed interconnects exhibiting geometric uncertainties
… to improve the current state-of-the-art in macromodeling techniques pertinent to the rational function interpolation of broadband electromagnetic responses of linear, passive, multiport, high-speed interconnect networks. First, we propose and demonstrate a new methodology that combines the …
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Micromechanics of strength-related phenomena in composite materials
… It is demonstrated that the constituents of the macromodel composite can be systematically altered in order to study physical parameters such as fiber volume fraction and fiber coatings.
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Fast timing simulation of MOS VLSI circuits
… This goal is achieved by the use of a nonlinear macromodeling which applies simple voltage calculations with accurate results. Macromodel current equations have been derived based on the dc characteristic equations of MOS transistors, capacitive loading effects, and model card parameters. The …
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Automatic generation of high level fault simulation models for analogue circuits
… a comparator, and comparing simulations of the macromodel against those of the original SPICE circuit utilizing transient analysis.The proposed algorithms generate multiple models to cover a wide range of input conditions by detecting nonlinearity through variations in output error, and can …
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Positioning, control, and dynamics of electrostatic actuators for use in optical and RF systems
… work on generating efficient reduced-order macromodels for simulating the dynamics of micromechanical devices by extracting global basis functions using information from a few runs of a computationally expensive finite element. model. Using a squeeze-film air-damped, …
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EARLY PERFORMANCE PREDICTION METHODOLOGY FOR MANY-CORES ON CHIP BASED APPLICATIONS
… for this purpose. The cores are represented by a macromodel automatically generated by a developed tool from IBIS models. The generated IBIS models are employed in the new netlists. Early performance prediction methodology maps a system specification to an instance of these netlists to provide a …
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CMOS current amplifiers : speed versus nonlinearity
… the second-generation current-conveyor (CCII), a macromodel is derived that, unlike other reported macromodels, can accurately predict the common-mode behaviour in differential applications. Similarly, this model is used to describe the nonidealities of several other current-mode amplifiers …
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Radiation force modeling for ICESat precision orbit determination
… area and reflectivity parameters of the ICESat macromodel surfaces, a high-fidelity simulation of the radiation forces in low-Earth orbit was first developed, using a detailed model of the satellite, called the “micro-model”. In this effort, new algorithms to compute such forces were adapted …
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Structural characterisation and absolute stereochemistry of some degraded carotenoids from New Zealand honeys
… by NMR and a molecular modeling study (MacroModel) of the diastereoisomeric hemiacetal MPA esters. The results of the determination, coupled with a consideration of crystallographically-determined hemiacetal ester conformations obtained from a search of the Cambridge Structural Database, …
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Micromechanics-Based Strength and Lifetime Prediction of Polymer Composites
… of fiber stress redistribution are made in macromodel composites where the fibers are large enough that strain gages can be mounted directly onto the fibers. The measurements are used to justify and develop a new form of load sharing where the load of the broken fiber is redistributed only …
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Stochastic modeling in computational electromagnetics
… is developed for the stochastic electromagnetic macromodeling of two-dimensional subdomains exhibiting geometric and material uncertainty. The methodology makes use of the theory of polynomial chaos expansion and the concept of a global impedance/admittance matrix relationship defined over a …
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