A differential coupled frequency doubling voltage-controlled crystal oscillator in a 0.35?μm CMOS process
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- 作者：Yanjun Yang ; Yun Zeng ; Jie Chen
- 关键词：CMOS VCXOs ; Varactors ; Linear frequency tuning ; Low phase noise
- 刊名：Analog Integrated Circuits and Signal Processing
- 出版年：2015
- 出版时间：May 2015
- 年：2015
- 卷：83
- 期：2
- 页码：195-202
- 全文大小：1,335 KB
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Yun Zeng (1)
Jie Chen (2)
1. School of Physics and Electronics, Hunan University, Changsha, 410082, China
2. Institute of Microelectronics of China Academy of Science, Beijing, 100029, China - 刊物类别：Engineering
- 刊物主题：Circuits and Systems
Electronic and Computer Engineering
Signal,Image and Speech Processing - 出版者：Springer Netherlands
- ISSN：1573-1979
文摘
This paper presents a high-performance differential coupled frequency doubling voltage-controlled crystal oscillator (VCXO). Frequency doubling and low phase noise are realized through a novel gm-boosted differential Colpitts oscillator. Distributed varactor arrays are used to obtain wide frequency tuning range and high tuning linearity simultaneously. The proposed VCXO is fabricated in a 0.35?μm 2P3M standard complementary metal-oxide semiconductor process at a supply voltage of 3.3?V, and the power dissipation is 7?mW. Measurement results show that the designed VCXO achieves ±135?ppm output frequency variation range with 5?% linearity and ?33?dBc/Hz phase noise at 1?kHz frequency offset by using a 40?MHz fundamental AT-cut crystal resonator.