Electronic Circuit Design
Mostrando 13-24 de 29 artigos, teses e dissertações.
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13. Verificação de equivalência de circuitos combinacionais dissimilares através do reaproveitamento de cláusulas de conflito
As time goes by, integrated circuits are becoming ever more present in our lives. From the mobile phones we use to the cars we drive, we have almost constant interaction with electronic devices. This proliferation leads to the necessity for more agile and compact circuits, which in turn, makes them more complex and expensive. To produce error-free circuits,
Publicado em: 2008
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14. Estimativa de consumo de energia em nivel de instrução para processadores modelados em ArchC / Instruction level power consumption estimation for ArchC processors
The constant reduction in size and consequential increase in number of transistors inside a chip causes an exponential growth in digital circuit power consumption. Combined with the growing demand for portable electronic devices, this has led to a rising concern about energy consumption. The more power is dissipated, the more heat is generated, and the more
Publicado em: 2007
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15. Modelagem e análise de desempenho dinâmico de complexos elétricos contendo centrais eólicas dotadas de geradores síncronos / Modeling and dynamic performance analysis of electric power systems containing wind installations equipped with synchronous generators
New generation resources, with low implantation and operation costs and that provoke the minimum possible impact to the environment, are undoubtedly focuses of attention to all the segments of the society. From this common sense, the alternative or renewable sources of energy, and particularly the wind, have certainly had a significant penetration in the com
Publicado em: 2007
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16. Modelagem e anÃlise de desempenho dinÃmico de complexos elÃtricos contendo centrais eÃlicas dotadas de geradores sÃncronos / Modeling and dynamic performance analysis of electric power systems containing wind installations equipped with synchronous generators
New generation resources, with low implantation and operation costs and that provoke the minimum possible impact to the environment, are undoubtedly focuses of attention to all the segments of the society. From this common sense, the alternative or renewable sources of energy, and particularly the wind, have certainly had a significant penetration in the com
Publicado em: 2007
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17. Análise técnica e econômica de um sistema de colheita florestal / Technical and economic analysis of a forest harvest system
Hand logging systems were the first adopted, mostly, in the exploitation of native forests, with no concern with the rationalization and productivity of such activities. In Brazil, the first activities of forest harvesting were carried out along the coast, at that time of discovery, when the main traded species was brazilwood. Machine selection and developme
Publicado em: 2007
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18. Geração de especificações executáveis para o projeto de módulos para sistemas em "Chips"
The increasing demand for electronic components is driving the integrated circuit market to an unexpected growth. In the about two to four years it will be possible to find circuits composed of a billion transistors. This capacity of integration is the responsible for the emergence of a new concept, System-on-a-chip (SoC), in which a complete computational s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/10/2006
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19. Desenvolvimento de conversor comutado em baixa frequencia para aplicação em sistemas de geração distribuida baseados em celulas a combustivel / Development of a low-frequency commutation converter for distributed generation system based on fuel cells
The connection of distributed power sources with the utility grid generally needs an electronic power converter for processing the locally generated power and injecting current into the system. This work presents a system intended to low-power distributed generation composed by a DC primary source, as a fuel cell. A boost converter connects the supply to an
Publicado em: 2006
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20. Sensor polimerico de umidade relativa com circuito condicionador de sinais integrado / Polymeric relative humidity sensor with integrated signal conditioning circuit
Este trabalho descreve o desenvolvimento de um sensor de umidade relativa que tem como elemento sensor um polímero (poli(óxido de etileno-co-epicloridrina)84:16), cuja condutividade varia com a umidade. O polímero foi depositado por casting sobre um substrato cerâmico sobre o qual, por sua vez, foram depositados dois eletrodos em forma interdigitada aos
Publicado em: 2005
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21. Implementation of on-chip AMBA bus based on Reconfigurable Computing / "Implementação do barramento on-chip AMBA baseada em computação reconfigurável"
A computação reconfigurável está se fortalecendo cada vez mais devido ao grande avanço dos dispositivos reprogramáveis e ferramentas de projeto de hardware utilizadas atualmente. Isso possibilita que o desenvolvimento de hardware torne-se bem menos trabalhoso e complicado, facilitando assim a vida do desenvolvedor. A tecnologia utilizada atualmente em
Publicado em: 2005
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22. DEVELOPMENT AND CHARACTERIZATION OF A FIELD MAGNETIC TRANSDUCER BASED ON GIANT MAGNETOIMPEDANCE EFFECT / DESENVOLVIMENTO E CARACTERIZAÇÃO DE UM TRANSDUTOR MAGNÉTICO BASEADO NO EFEITO DA MAGNETOIMPEDÂNCIA GIGANTE
In this dissertation, it is proposed the design of a magnetic field to voltage transducer based on the Giant Magnetoimpedance phenomenon (GMI), characterized by an innovative geometric configuration. In order to attain the best near-field sensibility and far-field immunity, the transducer`s sensitive element and electronic circuit were planned and implemente
Publicado em: 2005
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23. Avaliação e síntese de corantes fenotiazínicos para determinação espectrofotométrica de sulfeto e sulfito empregando sistemas de análise em fluxo.
In this work seven aromatic amines O e N-substituted were evaluated at optimized reaction conditions for symmetrics phenothiazinic dyes. DMPD, DEPD, PPD, PAP e PAA were the start reagent, where the yield for phenothiazinic dyes varying from 10% to 43% for different oxidizing (Fe3+ or ClO-), acids (H2SO4 or HBF4) and precipitant agent (ClO4 - or BF4 -). The l
Publicado em: 2004
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24. SYNTHESIS OF ELECTRONIC CIRCUITS FOR EVOLUTIONARY COMPUTING / SÍNTESE DE CIRCUITOS ELETRÔNICOS POR COMPUTAÇÃO EVOLUTIVA
This thesis investigates the application of evolutionary computing techniques in the synthesis of electronic circuits. Evolutionary computation encompasses a particular class of algorithm which employ some aspects of natural evolution as metaphors. Particularly, most of these algorithms borrow ideas from the natural selection, genetic material recombination
Publicado em: 1999