Open AccessReference‐less wake‐up receiver with noise suppression and injection‐locked clock recovery
Author(s) -
Chen ShihEn,
Lin JhihSyuan,
Li HsinFang,
Cheng KuangWei
Publication year - 2020
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
ISSN - 1751-8598
DOI - 10.1049/iet-cds.2019.0195
Subject(s) - sensitivity (control systems) , chip , noise (video) , electronic engineering , clock recovery , envelope detector , electrical engineering , injection locking , wake , envelope (radar) , computer science , power (physics) , clock rate , clock signal , cmos , electronic circuit , engineering , telecommunications , physics , amplifier , optics , artificial intelligence , image (mathematics) , aerospace engineering , quantum mechanics , laser , radar
A reference‐less ultra‐low‐power wake‐up receiver (WuRx) is proposed for the highly integrated Internet of things applications. The WuRx utilises a direct radio‐frequency envelope detection technique with input synchronised switching to suppress 1/ f noise and enhance the sensitivity. Moreover, injection‐locked clock and data recovery circuitry is used to perform on‐chip clock generation. A prototype 2.4 GHz WuRx is designed and implemented with 90 nm complementary metal–oxide–semiconductor technology. The chip area is 1.0 × 0.95 mm 2 . The measurement results show that the WuRx consumes 25 μW and achieves a sensitivity of −51.5 dBm for 200 kbps data rate.