{"ID":2873460,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2509.06698","arxiv_id":"2509.06698","title":"VCO-CARE: VCO-based Calibration-free Analog Readout for Electrodermal activity sensing","abstract":"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.","short_abstract":"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 wearab...","url_abs":"https://arxiv.org/abs/2509.06698","url_pdf":"https://arxiv.org/pdf/2509.06698v1","authors":"[\"Leidy Mabel Alvero-Gonzalez\",\"Matias Miguez\",\"Eric Gutierrez\",\"Juan Sapriza\",\"Susana Patón\",\"David Atienza\",\"José Miranda\"]","published":"2025-09-08T13:52:33Z","proceeding":"cs.AR","tasks":"[\"cs.AR\"]","methods":"[]","has_code":false}