April 2025
Intermediate to advanced
598 pages
16h 46m
Portuguese (Portugal, Brazil)
Content preview from Eletrónica Integrada Aplicada
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Capítulo 11. Passa do esquema para a placa de circuito impresso
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Os capítulos anteriores de trataram de várias peças do sistema e a discussão passa agora a organizar essas peças num esquema compreensível e documentado. A partir daí, examina a conceção de uma placa de circuito impresso (PCB), bem como o que é necessário para construir comercialmente uma PCB carregada de componentes.
O processo de conceção da placa de circuito impresso começa com a seleção dos componentes e a definição do esquema. Em seguida, pode ser criada uma lista de materiais (BOM) detalhada. Os componentes selecionados requerem pegadas de ligação adequadas para a montagem na PCB. Estas podem ser retiradas de bibliotecas de fornecedores existentes ou, para dispositivos menos comuns, podem ser concebidas de raiz.
Dependendo do tamanho da placa de circuito impresso e da complexidade do circuito, pode ser definido um conjunto adequado de camadas de placa de circuito impresso (também conhecido como empilhamento de camadas). É explorada uma estratégia para a colocação optimizada de componentes e ligações, com informações sobre muitos dos itens de "atenção especial" necessários para uma PCB. Estes incluem o design de linhas de transmissão, ligações de deteção Kelvin, desacoplamento de potência de baixa impedância, questões de interferência electromagnética (EMI) e descarga eletrostática (ESD), vias ...
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