A 2.5-nW Radio Platform With an Internal Wake-Up Receiver for Smart Contact Lens Using a Single Loop Antenna
SCIE
SCOPUS
- Title
- A 2.5-nW Radio Platform With an Internal Wake-Up Receiver for Smart Contact Lens Using a Single Loop Antenna
- Authors
- Jeon, Cheonhoo; Sim, Jae-Yoon
- Date Issued
- 2021-09
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Abstract
- The human eye has been considered to be a promising platform for real-time diagnosis of various biomarkers in tears. The smart contact lens (SCL), as a device which directly accesses surface of human eye, is a miniaturized autonomous system integrating all the required functions on the surface of a thin film. This article presents the first implementation of a set of radio including a wake-up receiver required for SCL. The system performs RF transmission upon wake-up call using a single loop antenna. The receiver path has a baseline-tracking offset control loop to successfully detect wakeup signal in the standby state under noisy environment. The operating frequencies for uplink and downlink are 346 and 433 MHz, respectively. A magnetic-coupled wireless charging of an OFF-chip battery is also provided through the same loop antenna. The designed IC is fabricated using 0.18-mu m CMOS process, consuming a power of 2.5 nW in wakeup-ready standby state. The IC is also verified with a loop antenna and a thin-film battery integrated on a substrate of SCL.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/113108
- DOI
- 10.1109/JSSC.2021.3071300
- ISSN
- 0018-9200
- Article Type
- Article
- Citation
- IEEE JOURNAL OF SOLID-STATE CIRCUITS, vol. 56, no. 9, page. 2668 - 2679, 2021-09
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