Cmos Technology
Mostrando 13-24 de 38 artigos, teses e dissertações.
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13. Automatic generation and evaluation of transistor networks in different logic styles / Geração automática e avaliação de redes de transistores em diferentes estilos lógicos
Currently, VLSI design has established a dominant role in the electronics industry. Automated tools have enabled designers to manipulate more transistors on a design project and shorten the design cycle. In particular, logic synthesis tools have contributed significantly to reduce the design cycle time. In full-custom designs, manual generation of transistor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2008
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14. Frequency synthesizers of 2.4 GHz from CMOS with 0.35 µm for ZigBee applications. / Sintetizador de freqüências de 2,4 GHz em CMOS, 0,35 µm para aplicações em ZigBee.
Frequency Synthesizers are circuits that generate pre-determined frequencies, used in both radio frequency reception and transmission. The Synthesizer circuits are composed by several blocks, such as Voltage-Controlled Oscillator (VCO), Prescaler, PFD (Phase/Frequency Detector), Charge Pump (CP), and Low Pass Filters (LPF). In 2003, an Integer-N architecture
Publicado em: 2008
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15. CMOS image system wiht high responsivity and high dynamic range / Sistemas de imagem CMOS com alta responsividade e elevada faixa dinamica
This thesis adresses two important challenges imposed by CMOS technology trends, the reduction of the junctions s responsivity and voltages levels. A new photodetector with high responsivity and a multi-sampling time domain image system are investigated. This thesis proposes to use the gate controlled lateral bipolar junction transistor (GCLBJT) as a four te
Publicado em: 2008
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16. Development of MEMS switch device technology MEMS - MicroelectromechanicalSystems - for RF - radio frequency - and new topologies of RF CMOS integrated circuits for radio receivers input sub-systems / Desenvolvimento de tecnologia de dispositivos chaves MEMS - MicroelectromechanicalSystems - para RF - Radio Frequencia - e novas topologias para circuitos integrados CMOS de RF em sub-sistemas de entrada de radio receptores
Este trabalho apresenta dois tópicos de pesquisa, o primeiro é referente ao projeto e desenvolvimento da tecnologia de fabricação de Chaves MEMS (Micro Electro Mechanical System) de RF e o segundo é o projeto de circuitos integrados. No que se refere a chaves MEMS, descreve-se o processo e a metodologia para projeto de Chaves MEMS paralela sobre linha d
Publicado em: 2008
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17. Isolantes de porta com altas constantes dieletricas (High K) para tecnologia MOS / High K gate insulators for MOS technology
High k insulators for the next generation (sub-32 nm CMOS (complementary metaloxide-semiconductor) technology), such as titanium oxide (TiOx), titanium oxynitride (TiOxNy), titanium-aluminum oxynitride (AlxTiwOyNz), titanium-aluminum nitride (AlxTiwNz) and titanium-aluminum oxide (AlxTiwOy), have been obtained by Ti or Ti/Al e-beam evaporation, with addition
Publicado em: 2008
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18. Estudo do efeito de elevação atípica da transcondutância na região linear de polarização em dispositivos SOI nMOSFETS ultra-submicrométricos. / Study of gate induced floating body effect in the linear bias region in deep submicrometer nMOSFETs devices.
This work presents the study of the Gate Induced Floating Body Effect (GIFBE) that occurs in the SOI MOSFET technology. This study has been performed based on experimental results and on numerical simulations, which were an essential auxiliary tool to obtain a physical insight of this effect. Besides the contribution on the physical explanation of this pheno
Publicado em: 2008
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19. On-silicon testbench for validation of soft logic cell libraries / Circuito de teste em silício para validação de bibliotecas de células lógicas geradas por software
Projeto baseado em células-padrão é a abordagem mais aplicada no mercado de ASIC atualmente. Essa abordagem de projeto consiste no reuso de bibliotecas de células pré-customizadas para gerar sistemas digitais mais complexos. Portanto a eficiência de um projeto ASIC está relacionado com a biblioteca em uso. A utilização de portas lógicas CMOS gerada
Publicado em: 2008
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20. Comparação de ferramentas para modelamento de indutores na tecnologia CMOS. / Comparison of tools for inductors model in the CMOS technology.
Two modeling tools for integrated planar square inductors and one software implementing analytical relations, were studied and analyzed, to determine which is the most appropriate, that is, the tools that will supply the closest results to experimental measurements with, lower costs, higher speed, etc. Integrated planar inductors present severe limitations i
Publicado em: 2007
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21. A low voltage and high efficiency class D amplifier based on sima-delta modulator designed for hearing-aids applications / Amplificador de audio classe D baseado em modulação sigma-delta destinado a aparelhos auditivos
This thesis presents the design of a firstorder ?-? audioband power amplifier optimized for hearing aid (HA) amplification. The majority of HAs use a 1.1V battery and require very low current consumption to improve battery life. This work made use of amplifiers and comparators based on CMOS inverters because such an inverter, with a 1.1V battery, can operate
Publicado em: 2007
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22. Modelagem e projeto de módulos amplificadores e comparadores em tecnologia CMOS 0,35um / Analysis and design of amplifiers and comparators modules in cmos 0.35um technology
Diferente do projeto de sistemas digitais, no qual as técnicas de projeto e ferramentas CAD vêm apresentando uma crescente evolução acompanhada da redução de seus preços, o projeto de sistemas analógicos CMOS ainda apresenta uma forte correlação com a experiência do projetista. Dentro deste contexto, importantes fatores como caracterização de te
Publicado em: 2007
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23. Mixed-signal analog-digital circuits design on the pre-diffused digital array using trapezoidal association of transistors
The mixed-signal and analog design on a pre-diffused array is a challenging task, given that the digital array is a linear matrix arrangement of minimum-length transistors. To surmount this drawback a specific discipline for designing analog circuits over such array is required. An important novel technique proposed is the use of TAT (Trapezoidal Association
Publicado em: 2007
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24. Exploração de reordenamento de ROBDDs no mapeamento tecnológico de circuitos integrados / Exploration of ROBDD reordering on technology mapping for integrated circuits
The ROBDDs are structures that have been successfully used in CAD tools for microelectronics. These structures allow canonical representation of boolean functions when established a fixed variable ordering. In the context of an automatic logic cell generator for integrated circuits, ROBDDs may serve as a base for deriving transistor networks from which elect
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2007