Ultralow-Power Class-C Complementary Colpitts Crystal Oscillator

被引：7

作者：

Xu, Zule ^{[1
]}

Kimura, Noritoshi ^{[2
]}

Okada, Kenichi ^{[3
]}

Miyahara, Masaya ^{[4
]}

机构：

[1] Univ Tokyo, Sch Engn, Syst Design Lab, Tokyo 1130032, Japan

[2] Piezo Studio Inc, Sendai, Miyagi 9800811, Japan

[3] Tokyo Inst Technol, Sch Engn, Dept Elect & Elect Engn, Tokyo 1528550, Japan

[4] High Energy Accelerator Res Org, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 3050801, Japan

来源：

IEEE SOLID-STATE CIRCUITS LETTERS | 2020年 / 3卷

关键词：

Class-C; Colpitts oscillator; crystal oscillator (XO); Internet of Things (IoT); Langasite-type crystal;

D O I：

10.1109/LSSC.2020.3014048

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

This letter presents a 24-MHz ultralow-power and lowphase-noise complementary Colpitts crystal oscillator. Class-C operation is realized by biasing the oscillator always in the weak-inversion region with the proposed circuit. A Langasite-type CTGS (Ca3TaGa3Si2O14) crystal resonator, with the characteristics different from those of quartz (SiO2), helps to reduce the startup time to less than 1 ms. An injectedgm-booster is implemented to speed up the oscillation further. Prototype chips in 65-nm CMOS were evaluated with CTGS and quartz resonators. With each type, the lowest steady-state power consumption and the best jitter FoM have been achieved. With the CTGS resonator, the startup energy as low as 10 nJ has also been achieved.

引用

页码：274 / 277

页数：4

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