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Abstract
This paper presents an application-specific integrated circuit (ASIC) front-end, to interface the printed capacitive sensors, using an amorphous Indium-Gallium-Zinc-Oxide (a-IGZO) thin film transistors (TFT) on flexible integrated circuit (FlexIC) technology. A ring oscillator (RO) based front-end sensor interface is designed with 0.024 mm2 area using 600 nm channel length of n-type TFTs consuming 183 nW at a supply voltage of 1 V. It generates output frequency sensitive to the change in the input capacitance of the printed coplanar sensor introduced by the moisture variations. Measurement results show that the front-end ASIC can detect the change in capacitance from 10 pF up to 500 pF of the printed coplanar sensor making it suitable not only for moisture detection but also for the evaluation of voided liquid volumes inside diapers to realize economical, disposable and battery-less Internet of Things (IoT) sensor nodes using green energy harvested from urine.
Original language | English |
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Title of host publication | FLEPS 2024 - IEEE International Conference on Flexible and Printable Sensors and Systems, Proceedings |
Publisher | IEEE |
Number of pages | 4 |
ISBN (Electronic) | 979-8-3503-8326-3 |
DOIs | |
Publication status | Published - 2024 |
MoE publication type | A4 Conference publication |
Event | IEEE International Conference on Flexible and Printable Sensors and Systems - Tampere, Finland Duration: 30 Jun 2024 → 3 Jul 2024 Conference number: 6 |
Publication series
Name | IEEE international conference on flexible and printable sensors and systems |
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ISSN (Electronic) | 2832-8256 |
Conference
Conference | IEEE International Conference on Flexible and Printable Sensors and Systems |
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Abbreviated title | FLEPS |
Country/Territory | Finland |
City | Tampere |
Period | 30/06/2024 → 03/07/2024 |
Keywords
- Disposable electronics
- Energy harvesting
- Flexible electronics
- IoT sensor node
- Printed electronics
- Printed Sensors
- Ultra-low-power
Fingerprint
Dive into the research topics of 'Ultra-Low-Power Front-end Design on Flexible IC Technology for Capacitive Sensors'. Together they form a unique fingerprint.Projects
- 1 Finished
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EHIR: Wireless impulse radio data link powered by energy harvesting
Halonen, K. (Principal investigator), Monga, D. (Project Member), Numan, O. (Project Member), Singh, G. (Project Member), Tanweer, M. (Project Member), Ylä-Oijala, P. (Project Member), Gallegos Rosas, K. (Project Member), Adam, K. (Project Member), Najmussadat, M. (Project Member) & Wang, Z. (Project Member)
01/09/2020 → 31/08/2023
Project: Academy of Finland: Other research funding
Equipment
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Aalto Electronics-ICT
Ryynänen, J. (Manager)
Department of Electronics and NanoengineeringFacility/equipment: Facility