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
收藏
页码：274 / 277
页数：4
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