Open AccessDesign of a charge amplifier for a low‐power respiration‐monitoring system
Author(s) -
Mahbub Ifana,
Shamsir Samira,
Pullano Salvatore A.,
Fiorillo Antonino S.,
Islam Syed K.
Publication year - 2019
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
eISSN - 1751-8598
pISSN - 1751-858X
DOI - 10.1049/iet-cds.2018.5369
Subject(s) - amplifier , computer science , context (archaeology) , wearable computer , noise (video) , low noise amplifier , electrical engineering , electronic engineering , bandwidth (computing) , engineering , telecommunications , embedded system , artificial intelligence , paleontology , image (mathematics) , biology
Home‐based health care applications are rapidly gaining popularity, enabling a renewed focus on the design of low‐power and low‐noise front‐end circuitry. In this context, the evaluation of low‐frequency biomedical signals, such as the respiration pattern, benefits from the design of a front‐end amplifier with reduced power consumption and low noise. Continuous efforts on improving the performances of respiration‐monitoring devices have resulted in the reduction of noise and motion artefacts by increasing complexity (e.g. complex algorithms or high precision filtering) at the expense of increased power consumption. This study is focused on the design of a fully integrated charge amplifier for respiration monitoring based on a pyroelectric sensor. Simulation and test results show a power consumption of 1.8 µW, an active die area of 0.085 mm 2 , a bandwidth in the range from 10 mHz to 13 kHz, and a remarkable noise efficiency factor of ∼2.79, which fits well with the development of an energy efficient wearable device.