Low Power Bio-Impedance Sensor Interfaces: Review and Electronics Design Methodology

Assessing blood flow, respiration patterns, and body composition with wearable and noninvasive bio-impedance (BioZ) sensors has distinctive advantages over the conventional clinical practice. The merits of BioZ sensors derive from having long-term monitoring capability and improved user friendliness...

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Bibliographic Details
Published in:IEEE reviews in biomedical engineering 2022, Vol.15, p.23-35
Main Authors: Xu, Jiawei, Hong, Zhiliang
Format: Article
Language:English
Subjects:
Bio-impedance spectroscopy
Biomedical monitoring
Blood flow
Body composition
Broadband communication
Chronic conditions
Chronic illnesses
Circuit design
Current measurement
Design
Design optimization
Electric Impedance
electrical impedance tomography (EIT)
Electrodes
Electronics
Frequency measurement
Heart
Humans
Impedance
Impedance measurement
Interfaces
Optimization techniques
Power management
respiration
Sensors
Signal integrity
Systems design
wearable
Wearable Electronic Devices
Wearable technology
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Summary:Assessing blood flow, respiration patterns, and body composition with wearable and noninvasive bio-impedance (BioZ) sensors has distinctive advantages over the conventional clinical practice. The merits of BioZ sensors derive from having long-term monitoring capability and improved user friendliness. These open up the way to build medical grade wearable devices for chronic conditions. Low power, high precision BioZ sensor interface IC is the heart of such devices, it also determines the signal integrity of the overall system. Nevertheless, electrical design challenges from both circuit and system perspective still need to be addressed. This paper reviews the pioneering BioZ interface ICs and systems, and proposes major electrical specifications for wearable BioZ sensors. System design methodologies and circuit optimization techniques are summarized as guidelines to develop the next generation BioZ interface electronics.
ISSN:1937-3333
1941-1189
DOI:10.1109/RBME.2020.3041053