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Um estudo sobre o amplificador de potência CMOS para comunicação sem fios
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ISBN10: 620828452X
ISBN13: 9786208284527
Publisher: Edicoes Nosso Conhecimento
Published: Nov 12 2024
Pages: 60
Weight: 0.22
Height: 0.14 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786208284527
Publisher: Edicoes Nosso Conhecimento
Published: Nov 12 2024
Pages: 60
Weight: 0.22
Height: 0.14 Width: 6.00 Depth: 9.00
Language: Portuguese
À medida que a moderna tecnologia de comunicação sem fios evolui, os amplificadores de potência (PAs) de RF tornam-se um tema quente, porque são o componente-chave dos sistemas de comunicação móvel sem fios e a qualidade da comunicação depende fortemente do desempenho dos PAs de RF. Os sistemas de comunicação sem fios modernos, como o CDMA2000, WCDMA, OFDM, etc., destinam-se a maximizar a velocidade de transmissão de dados num ambiente em rápida evolução. Os sinais modulados destes sistemas requerem uma boa linearidade e eficiência, ao mesmo tempo que os sinais têm um elevado rácio entre o pico e a potência média. Assim, a linearidade e a eficiência são duas das caraterÃsticas mais importantes dos PAs para aplicações sem fios. Recentemente, um número crescente de componentes de RF está a ser integrado utilizando o processo CMOS para satisfazer os requisitos de baixo custo e pequenas dimensões nos mercados de consumo sem fios. No entanto, o amplificador de potência CMOS é difÃcil de projetar devido à baixa tensão de rutura, ao substrato condutor de Si e à falta de ligação à terra. Tudo isto torna a conceção de um PA totalmente integrado extremamente difÃcil. Este livro centra-se no aumento da eficiência e nas técnicas de linearização para o projeto de amplificadores de potência CMOS.
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