168576 20260211123813.0 doi 10.1016/j.measurement.2026.120619 sideral 148024 ART-2026-148024 eng Aparicio-Téllez, Raúl Universidad de Zaragoza (orcid)0000-0003-0365-6702 Exploiting nonlinear oscillator dynamics for on-chip thermal sensing 2026 Real-time monitoring of temperature in FPGAs is crucial to ensure system reliability, as local temperature variations can affect their performance. For these purposes, virtual temperature sensors such as Ring Oscillator (RO)-based sensors are widely used. However, efficiently implementing them with a minimal number of Look-Up Tables (LUTs) remains a significant challenge. In this paper, we propose a novel temperature sensor architecture based on nonlinear oscillators, implemented on a 28 nm Artix-7 FPGA. The proposed approach minimizes the usage of FPGA resources while maintaining accurate thermal sensing. As a result, several nonlinear oscillators are analyzed, achieving better sensitivity (0.020%/°C) over a 25 % wider temperature range compared to other RO-based temperature sensors reported in the literature for the 28 nm technology node. These results highlight the potential of these oscillators as efficient, low-resource alternatives for real-time thermal monitoring in FPGA. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/AEI/PID2020-114110RA-I00 info:eu-repo/grantAgreement/ES/AEI/PID2023-150244OB-I00 info:eu-repo/grantAgreement/ES/MICIU/PDC2023-145838-I00 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Garcia-Bosque, Miguel Universidad de Zaragoza (orcid)0000-0001-8648-6248 Diez-Señorans, Guillermo (orcid)0000-0001-9131-0861 Celma, Santiago Universidad de Zaragoza (orcid)0000-0003-0182-7723 5008 250 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Electrónica 268 (2026), 120619 [11 pp.] Measurement MEASUREMENT 0263-2241 2184511 http://zaguan.unizar.es/record/168576/files/texto_completo.pdf Versión publicada 2746969 http://zaguan.unizar.es/record/168576/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:168576 articulos driver 2026-02-11-10:27:32 ARTICLE