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<strong>An ultra-low power wake-Up timer compatible with n-FET based flexible technologies</strong><br />
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Flexible integrated circuits (FlexICs) have drawn increasing attention, particularly in remote sensors and wearables operating in a limited power budget. Here, we present an ultra-low power timer designed to wake-up an external circuit periodically, from a deep-sleep state into an active state, thereby largely reducing the system power consumption. We achieved this with a circuit topology that exploits the transistor’s leakage current to generate a low frequency wake-up signal. This topology is compatible with IC technologies where only n-type transistors are available. The design was implemented with the sustainable FlexIC process of PragmatIC, that is based on Indium Gallium Zinc Oxide (IGZO) thin-film transistors. Our timer generates mean wake-up frequency of 0.24 ± 0.15 Hz, with a mean power consumption of 26.7 ± 14.1 nW. In this paper, we provide details of the Wake-Up timer’s design and performance at different supply voltages, under temperature variations and different light conditions.
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NARBÓN, D., SOLER-FERNÁNDEZ, J. l., SANTOS, A., BARQUINHA, P., MARTINS, R., DIÉGUEZ BARRIENTOS, Àngel, PRADES, J. d., ALONSO CASANOVAS, Oscar. <strong>An ultra-low power wake-Up timer compatible with n-FET based flexible technologies</strong><br />. _2025_. [consulta: 5 de desembre de 2025]. ISSN: 2397-4621. [Disponible a: https://hdl.handle.net/2445/218383]