this paper presents an accurate model for symmetric load ring Voltage Controlled Oscillators (VCO) in submicron technologies. The proposed VCO model is based on the Mosfet Advanced Compact Model in order to guarantee ...
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The realization of spaceborne SAR imaging on-board is a necessary trend for digital avionics in speedily advancing SAR remote sensors. Powerful and efficient application-specific instruction-set processors (ASIPs) pla...
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ISBN:
(纸本)9780819469601
The realization of spaceborne SAR imaging on-board is a necessary trend for digital avionics in speedily advancing SAR remote sensors. Powerful and efficient application-specific instruction-set processors (ASIPs) play a leading role in this solution to keep data processing system functioning real-time. A few improving methodologies, technologies and advanced EDA tools in microelectronics make it possible to design such a SAR imaging processor easier and faster. Some evident and important delegates of them, including system-level modeling and simulation for SAR imaging algorithm, available IP library designed by experts, ideas of designing domain-specific SoC with multiple processors and the microelectronic ways to ruggedize avionics applied in space radiation-active environment, are presented heuristically in this paper.
Functional verification by simulation is often based on behavioral models and represents an important step during the development of microelectronic solutions for automotive applications. The present article describes...
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ISBN:
(纸本)1420061844
Functional verification by simulation is often based on behavioral models and represents an important step during the development of microelectronic solutions for automotive applications. The present article describes a data-based approach for semi-automated generation of behavioral models for analog mixed-signal (A/MS) systems. The approach is based on support vector machines and a transformation dictionary for extraction of dynamic properties. The application of this method results in highly accurate pin-compatible behavioral models for A/MS systems with a significant reduction in simulation times. Additionally, the generated models can be easily integrated in hardware or system-level description languages. Another benefit of the proposed method consists in its flexibility to model systems of different physical domains. The emphasized properties will be illustrated by the modeling of an analog-digital system belonging to the automotive domain.1.
Business performance management today does not possess a rigorous and grounded engineering methodology capable of delivering reliably measured values to backing up decision making. Much more it is the art of executive...
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ISBN:
(纸本)9783540744788
Business performance management today does not possess a rigorous and grounded engineering methodology capable of delivering reliably measured values to backing up decision making. Much more it is the art of executive gurus who listen to their backbone experience and take their decisions using intuitive and heuristic approaches. This vagueness appears to be one of the main reasons for current dissatisfaction in industry. In this paper we express our vision of how a rigorous engineering methodology for business performance management in engineering design may look like. Our research work in PSI1 and PRODUKTIV+(2) projects strongly suggests that the underlying modeling framework, has to be holonic. We consider that the solution has to: (i) be based on a sound Domain ontology of performance;(ii) use dynamic distributed planning technique and simulations to predict the performance of a design system;(iii) use the methodology which is sensitive to the specificities of a particular design system.
This paper is devoted to modeling and simulation of MEMS devices using VHDL-AMS language. Before constructing a prototype, a simulation of the whole system is necessary to check the functionality of individual compone...
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This paper is devoted to modeling and simulation of MEMS devices using VHDL-AMS language. Before constructing a prototype, a simulation of the whole system is necessary to check the functionality of individual components and their interaction. For MEMS, a design environment is needed which allows simulation of different physical domains including coupling effects. VHDL-AMS is a flexible system description language suitable for matching such requirements. Additionally, it allows to describe and to simulate the system at different levels of abstraction.
We present design and simulation results of a NEMS (Nanoelectromechanical system) based mechanical sensor using a silicon suspended-beam comprising two-dimensional (2-D) photonic crystal (PhC) microcavity structure. A...
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ISBN:
(纸本)9781424406364
We present design and simulation results of a NEMS (Nanoelectromechanical system) based mechanical sensor using a silicon suspended-beam comprising two-dimensional (2-D) photonic crystal (PhC) microcavity structure. A silicon line defect in a 2-D photonic crystal is considered as a waveguide for confining light propagation within waveguide. The resonant band gap structure is added into a PhC waveguide and leads to sharp resonant peak in output spectrum. Since the resonant wavelength of output spectrum is sensitive to the shape of air holes and defect length of the micro-cavity. Results of resonant wavelength shift regarding to deformation or force loading on the suspended PhC waveguide beam are calculated. Thus deformation and force loads can be detected in terms of resonant wavelength shift.
Interfacial delamination is a common cause of failure in microelectronic packages. Characterization and prediction of interface behavior in manufacturing, testing and application conditions is demanded in order to red...
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ISBN:
(纸本)9781424409846
Interfacial delamination is a common cause of failure in microelectronic packages. Characterization and prediction of interface behavior in manufacturing, testing and application conditions is demanded in order to reduce development times and costs of IC packages. In the design processes of microelectronics, possible interface delamination is evaluated by the critical energy release rate to detach the materials. This critical energy release rate can be obtained experimentally using various approaches. However, its measurement is complicated due to the fact that adhesion strength is not only temperature and moisture dependent but also stress state (mode mixity [1]) dependent. This paper describes our efforts on interface characterization as a function of mode dependency. A new test setup is designed and built. It allows transferring two separated loads on a single specimen. The test methodology that is developed in this paper is also able to evaluate the interfacial fracture toughness as function of temperature and moisture. The crack length, necessary for calculation of the energy release rate is measured by means of an optical microscope. Finite element simulation is used to interpret the experimental results and thus to establish the critical energy release rates and mode mixities.
This paper presents an accurate model for symmetric load ring Voltage Controlled Oscillators (VCO) in submicron technologies. The proposed VCO model is based on the Mosfet Advanced Compact Model in order to guarantee ...
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This paper presents an accurate model for symmetric load ring Voltage Controlled Oscillators (VCO) in submicron technologies. The proposed VCO model is based on the Mosfet Advanced Compact Model in order to guarantee high accuracy of results when submicron technologies are used. An example considering a 1.8 V SMIC018 VCO is presented, where the accuracy of the results obtained against Hspice simulation is shown. The simplicity of the model as well as the accuracy of the results obtained, make the proposed model a good candidate for being integrated into a system for the automatic design of VCOs.
This paper proposes an algorithm that drives a unicycle type robot to a desired path, including obstacle avoidance capabilities. The path following control design relies on Lyapunov theory, backstepping technics and d...
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ISBN:
(纸本)9781629934716
This paper proposes an algorithm that drives a unicycle type robot to a desired path, including obstacle avoidance capabilities. The path following control design relies on Lyapunov theory, backstepping technics and deals explicitly with vehicle dynamics. Furthermore, it overcomes initial condition constraint present in a number of path following control strategies described in the literature. This is done by controlling explicitly the rate of progression of a "virtual target" to be tracked along the path;thus bypassing the problems that arise when the position of the path target point is simply defined as the closest point on the path. The obstacle avoidance part is using the Deformable Virtual Zone principle, that defines a safety zone around the vehicle, in which the presence of an obstacle induces an "intrusion of information" that drives the vehicle reaction. The overall algorithm is combined with a guidance solution that embeds the path following requirements in a desired intrusion information function, that steers the vehicle to the desired path while the DVZ is virtually keeping a minimal contact with the obstacle, implicitly bypassing it. simulation and experimental results illustrate the performance of the control system proposed.
Early power estimation is increasingly important in Multiprocessor System-On-Chip(MPSoC) architectures for a reliable design Space Exploration (DSE). In this paper, we present an MPSoC power modeling framework at the ...
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Early power estimation is increasingly important in Multiprocessor System-On-Chip(MPSoC) architectures for a reliable design Space Exploration (DSE). In this paper, we present an MPSoC power modeling framework at the Timed Programmer View (PVT) level that offers a good performance/power tradeoff to be found early in the design flow. Using a hybrid power modeling methodology, we developed several power models derived from both physical measurements and analytical expressions. Plugging these power models into the PVT architectural simulator makes it easy to estimate the application's performance and power consumption with high simulation speedup. The effectiveness of our method is illustrated through a DSE for a parallelized version of H.263 encoder application.
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