2026-04-232026-04-232026-02-27PINA, Bianca Vitória Silva. Análise comparativa do desempenho de filtros analógicos e digitais do tipo rejeita-faixa aplicados na supressão do ruído da rede elétrica no sinal eletromiográfico. Orientadora: Ana Carolina Quintão Siravenha Müller. 2025. 106 f. Trabalho de Curso (Bacharelado em Engenharia Elétrica e Biomédica) – Faculdade de Engenharia Elétrica e Biomédica, Instituto de Tecnologia, Universidade Federal do Pará, Belém, 2026. Disponível em: https://bdm.ufpa.br/handle/prefix/9473 . Acesso em:.https://bdm.ufpa.br/handle/prefix/9473This work presents a comparative and qualitative analysis of the performance of analog and digital band-stop filters applied to the processing of electromyographic signals, with the primary objective of improving EMG signal quality by reducing power-line interference while preserving its physiologically relevant characteristics for analysis. For the analog stage, f ive printed circuit boards were developed using the Proteus software, each corresponding to a distinct notch filter topology, integrated into an acquisition system to evaluate the effectiveness of hardware-based filtering. In parallel, in the digital domain, algorithms were implemented in MatLab to process previously acquired raw signals, deliberately preserving the presence of power-line interference (60Hz) for comparative purposes. The evaluation of the results obtained from both approaches was conducted in MatLab, with emphasis on spectral analysis and the ability to attenuate power-line noise, enabling a structured comparison between analog and digital performances.Acesso AbertoArtefatos da rede elétricaCondicionamento de sinaisFiltro notchInstrumentação biomédicaSinal eletromiográficoElectrical grid artifactsSignal conditioningNotch filterBiomedical instrumentationSignal processingSignal qualityElectromyographic signalCNPQ::ENGENHARIAS::ENGENHARIA BIOMEDICATrabalho de Curso - Graduação - Monografia