This paper presents a wireless vital signs monitoring system-on-chip including three-lead ECG, bio-impedance (Bio-Z) and body temperature. A Bio-Z readout channel with early demodulation is introduced to detect small body impedance change below 300 mΩ under large baseline resistance while consuming power of 9.8 μW. A direct temperature-to-digital converter is also incorporated, which achieves an absolute resolution of 0.023 °C and inaccuracy less than ±0.13 °C over temperature range of 32-42 °C. The quantized vital sign signal is transmitted through a multi-channel reconfigurable QPSK/BFSK transmitter (TX) to accommodate different power-constraint scenarios. Fabricated in 130-nm CMOS technology with a total die area of 6.25 mm, the proposed SoC only consumes 74 μW under 0.9-V supply.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1109/TBCAS.2019.2922295 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cognitive neurodynamic approaches to adaptive signal processing in wireless sensor networks.
Cogn Neurodyn
December 2025
Department of Electronics and Communication Engineering, R.M.K. College of Engineering and Technology, Chennai, India.
In recent years, Wireless Sensor Networks (WSN) have become vital because of their versatility in numerous applications. Nevertheless, the attain problems like inherent noise, and limited node computation capabilities, result in reduced sensor node lifespan as well as enhanced power consumption. To tackle such problems, this study develops a Modified-Distributed Arithmetic-Offset Binary Coding-based Adaptive Finite Impulse Response (MDA-OBC based AFIR) framework.
View Article and Find Full Text PDFWireless microwave-to-optical conversion via programmable metasurface without DC supply.
Nat Commun
January 2025
State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, China.
Microwave-optical interaction and its effective utilization are vital technologies at the frontier of classical and quantum sciences for communication, sensing, and imaging. Typically, state-of-the-art microwave-to-optical converters are realized by fiber and circuit approaches with multiple processing steps, and external powers are necessary, which leads to many limitations. Here, we propose a programmable metasurface that can achieve direct and high-speed free-space microwave-to-laser conversion.
View Article and Find Full Text PDFContinuous vital sign monitoring of patients recovering from surgery on general wards: a narrative review.
Br J Anaesth
January 2025
Perioperative Outcomes and Informatics Collaborative, Winston-Salem, NC, USA; Outcomes Research Consortium, Houston, TX, USA; Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Most postoperative deaths occur on general wards, often linked to complications associated with untreated changes in vital signs. Monitoring in these units is typically intermittent checks each shift or maximally every 4-6 h, which misses prolonged periods of subtle changes in physiology that can herald a critical downstream event. Continuous monitoring of vital signs is therefore intuitively necessary for patient safety.
View Article and Find Full Text PDFFlexible Mechanical Sensors for Plant Growth Monitoring: An Emerging Area for Smart Agriculture.
Sensors (Basel)
December 2024
School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
The last decade has seen significant progress in the development of flexible electronics and sensors, particularly for display technologies and healthcare applications. Advancements in scalable manufacturing, miniaturization, and integration have further extended the use of this new class of devices to smart agriculture, where multimodal sensors can be seamlessly attached to plants for continuous and remote monitoring. Among the various types of sensing devices for agriculture, flexible mechanical sensors have emerged as promising candidates for monitoring vital parameters, including growth rates and water flow, providing a new avenue for understanding plant health and growth under varied environmental conditions.
View Article and Find Full Text PDFPreoperative estimated glomerular filtration rate to predict cardiac events in major noncardiac surgery: a secondary analysis of two large international studies.
Br J Anaesth
January 2025
Population Health Research Institute, Hamilton, ON, Canada; Department of Medicine, McMaster University, Hamilton, ON, Canada.
Background: Optimised use of kidney function information might improve cardiac risk prediction in noncardiac surgery.
Methods: In 35,815 patients from the VISION cohort study and 9219 patients from the POISE-2 trial who were ≥45 yr old and underwent nonurgent inpatient noncardiac surgery, we examined (by age and sex) the association between continuous nonlinear preoperative estimated glomerular filtration rate (eGFR) and the composite of myocardial injury after noncardiac surgery, nonfatal cardiac arrest, or death owing to a cardiac cause within 30 days after surgery. We estimated contributions of predictive information, C-statistic, and net benefit from eGFR and other common patient and surgical characteristics to large multivariable models.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!