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 |
Externí odkaz: |
načítá se...