2025/09/08 by Leidy Mabel Alvero-Gonzalez, Matías Miguez, Alvero-Gonzalez, Leidy Mabel +11
Computer Science · Neuroscience · #EEG and Brain-Computer Interfaces #FOS: Computer and information sciences #Hardware Architecture (cs.AR) #Neural Networks and Applications
paper · pdf · doi:10.48550/arxiv.2509.06698
openalex publication_date 2025/09/08 · openalex created_date 2025/10/11 · openalex updated_date 2026/07/28
Continuous monitoring of electrodermal activity (EDA) through wearable devices has attracted much attention in recent times. However, the persistent challenge demands analog front-end (AFE) systems with high sensitivity, low power consumption, and minimal calibration requirements to ensure practical usability in wearable technologies. In response to this challenge, this research introduces VCO-CARE, a Voltage-Controlled Oscillator-based Analog Readout tailored for continuous EDA sensing. The results show that our system achieves an exceptional average sensitivity of up to 40 pS within a 0-20 uS range and a negligible relative error of less than 0.0025% for fixed-resistance. Furthermore, the proposed system consumes only an average of 2.3 uW based on post-layout validations and introduces a low noise contribution, measuring only 0.8 uVrms across the 0-1.5 Hz EDA signal band. This research aims to drive the evolution of wearable sensors characterized by seamless adaptability to diverse users, minimal power consumption, and outstanding noise resilience.