Low Noise Amplifier
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. ELECTRICAL NOISES REDUCTION IN NANOPORES EXPERIMENTS BASED ON CONSENSUS FILTER
Nanopore has developed into an indispensable tool for single molecules experiments, where useful information about the characteristics of DNA/RNA can be obtained from the flowing of ionic current elicited by individual molecules as they traverse a single nanometer-scale aperture. However, due to the relatively high background current noise and low measuremen
Quím. Nova. Publicado em: 20/07/2020
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2. Co-Design of a GPS Antenna Low-Noise Amplifier Front-End Circuit
Abstract This paper presents a clear and fast design procedure for directly matched low noise active integrated microstrip antenna front end circuits. Initially, a theoretical analysis is given for the overall gain equivalence between traditional and directly matched antennas. Then, a detailed procedure is presented for the design and construction of a fully
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 11/11/2019
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3. A passive-matched 22 GHz 2.6-dB-NF CMOS front-end with a 70-800 ps delay block
This paper presents a power-efficient RF differential receiver front-end supporting transmitted-reference (TR) communication in a 90 nm CMOS technology. Particularly, it addresses the issues of designing the frontend amplifier with low-noise and passive matching circuits on a silicon process and integrating a low-power delay unit in the front-end with wideba
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-06
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4. Espectroscopia ultrarrápida do polímero semicondutor luminescente MEH-PPV com excitação no ultravioleta / Ultrafast spectroscopy of the luminescent semiconducting polymer MEH-PPV with ultraviolet excitation
The optoelectronics industry is currently undergoing a transition period in which inorganic materials are being replaced by organic materials, oligomers and polymers, in the fabrication of some types of devices. However, factors such as low efficiency and low lifetime prevent polymer based devices on entering the market definitely. The solution of these issu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2012
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5. Projeto de indutores ativos para RF / Design of active inductors for RF
Indutores Ativos são circuitos que quando utilizados se mostram como uma opção viável para melhorar o aproveitamento de área do chip e o fator de qualidade do indutor, comparado com indutor passivo, além de possibilitar o ajuste de parâmetros. Neste trabalho foram estudadas três topologias e abordagens encontradas na literatura para indutores ativos:
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/12/2011
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6. Design of a low noise amplifier considering noise and power. / Projeto de um amplificador de baixo ruído em CMOS considerando o ruído e a potência.
Esta dissertação apresenta o projeto de um amplificador de baixo ruído (LNA) para aplicação em 2,4 GHz na tecnologia CMOS 0,35 µm. A metodologia baseia-se na obtenção das dimensões dos dispositivos do circuito considerando o consumo de potência e o desempenho em relação ao ruído. Os resultados mostram que a metodologia implementada é eficaz no
Publicado em: 2008
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7. Circuitos integrados de radio-recepção para a operação de multiplexação espacial de antenas em tempo real / Integrated circuits of radio-reception for spatial multiplexing of antennas in real time
This research aims the conception of new topologies of integrated circuits and its characterizations for operation in radio-receiver systems. The design and fabrication of RF switches, LNAs, mixer, and VCOs are presented. The SMILE - Spatial MultIplexing of Local Elements - technique was adopted due to its advantages and functionality for the intelligent ant
Publicado em: 2008
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8. 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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9. Tool for modeling communication systems. / Ferramenta para modelagem de sistemas de comunicação.
This work presents a tool for the simulation of Communication Systems using macromodels for each block used. The tool is based on behavioral models of Radio Frequency (RF) blocks, which minimize cost, simulation time and allows a fast determination of problems in the early phases of the design of a Wireless Communication System. The development of blocks lik
Publicado em: 2007
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10. Optical Amplifiers for High Capacity Multichannel Communication Systems / Amplificadores Ãpticos para Sistemas de ComunicaÃÃo Multicanais de Alta Capacidade
The ever increasing demand for data traffic suggests the capacity expansion of optical communication systems. One can obtain this by increasing the number of transmitted channels in alternative optical bands. To achieve this it is necessary to develop optical amplifers for each band. The most common amplifiers are EDFA. Nevertheless, Raman amplifiers and TDF
Publicado em: 2005
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11. Amplificadores Ãpticos a fibras dopadas com TÃlio para a banda "S"
Due to the ever increasing amount of data traffic it has become necessary to expand the capacity of optical communication systems. This can be achieved by increasing the number of transmitted channels using Wavelength Division Multiplexing. Due to improvements of the manufacturing process of optical fibers, it is possible to use the entire low-loss spectral
Publicado em: 2005
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12. Estudo do sistema de transdução paramétrica para detectores de ondas gravitacionais / Study of parametric transduction system for gravitational wave detectors
The search for gravity waves began in 60s with Weber. After 40 years we still dont have any experimental evidences of its existence. In spite of this, many research groups around the world are still working in this search. The possibility of detection of this kind of wave will open a new window to study the universe and that is a strong reason to justify all
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/09/2003