Pseudo-Resistor-Based ECG Amplifier: Design, Implementation and Temperature Characterization

Authors

  • Beatriz Barsocchi Testa Pessoa Department of electrical engineering, Centro Universitário FEI, São Bernardo do Campo, Brazil
  • Cleiton Fidelix Pereira Department of electrical engineering, Centro Universitário FEI, São Bernardo do Campo, Brazil
  • Pedro Luiz Benko Department of electrical engineering, Centro Universitário FEI, São Bernardo do Campo, Brazil
  • Ricardo Germano Stolf
  • André Luiz Perin Department of electrical engineering, Centro Universitário FEI, São Bernardo do Campo, Brazil
  • Julio Cesar Lucchi
  • Milene Galeti Department of electrical engineering, Centro Universitário FEI, São Bernardo do Campo, Brazil
  • Rudolf Theoderich Buhler Department of electrical engineering, Centro Universitário FEI / Instituto Mauá de Tecnologia, Brazil, SP
  • Renato Camargo Giacomini Department of electrical engineering, Centro Universitário FEI, São Bernardo do Campo, Brazil

DOI:

https://doi.org/10.29292/jics.v18i3.768

Keywords:

ECG, FREQUENCY, TEMPERATURES, FREQUENCY RESPONSE

Abstract

Biomedical signal amplifiers are fundamental in various medical applications for acquiring crucial biological signals such as ECG, EEG, and EMG. The use of pseudo-resistors has been recently studied for biological amplifiers, mainly because of their fast recovery time after interference pulses, which are frequent in such applications. The previous studies on pseudo-resistors are limited to simulation, modeling, and implementing some narrow-bandwidth amplifiers. For the first time, this study uses the piecewise linear (PWL) model integrated with pseudo-resistors to design a tailored circuit for ECG applications, with 0.04 Hz to 2 kHz bandwidth for the full application temperature range. The circuit is fully modeled, simulated, and characterized, fine-tuning the feedback capacitance values to optimize performance within the crucial temperature range for biomedical applications. This full bandwidth amplifier represents a significant advancement in biomedical signal amplification technology, ensuring comprehensive signal fidelity allied to fast recovery response.

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Published

2023-12-28