A 5.02nW 32-kHz Self-Reference Power Gating XO With Fast Startup Time Assisted by Negative Resistance and Initial Noise Boosters

Autor: Yongtae Shin, Jee-Ho Park, Seong-Jin Kim, Jaehyuk Choi
Rok vydání: 2021
Předmět:
Zdroj: IEEE Transactions on Circuits and Systems II: Express Briefs. 68:3386-3390
ISSN: 1558-3791
1549-7747
DOI: 10.1109/tcsii.2021.3077589
Popis: We present a 32.768 kHz crystal oscillator with ultra-low power operation and a fast startup featuring for IoT applications. A self-reference power gating scheme detects the amplitude of a clock, enabling a negative resistance booster to awake XO and keep the oscillation with a duty-cycling technique for minimizing power consumption. In addition, a relaxation oscillator injects in-band noise initially, further reducing the startup time. The prototype XO for proof-of-concept was fabricated in 0.11- $\mu \text{m}$ CMOS and fully characterized. It consumes 5.02 nW at 0.5-V supply and achieves the startup time of 1.26 s simultaneously.
Databáze: OpenAIRE
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