A-189 dBc/Hz FoM(T) Wide Tuning Range VCO Using Q-Factor Enhancement Technique

作者：Liu, Faen; Wang, Zhigong^*; Li, Zhiqun; Li, Qin; Wang, Rong; Yang, Geliang; Li, Zhu

来源：Journal of Infrared Millimeter and Terahertz Waves, 2015, 36(6): 597-606.

DOI：10.1007/s10762-015-0159-3

• CMOS
• VCO
• Wide tuning range
• Low phase noise
• Q-factor enhancement
• Millimeter-wave

A 28-GHz voltage-controlled oscillator (VCO) with a wide tuning range and a low phase noise is presented in this paper. A PMOS-only cross-coupled pair with a lower flicker noise is exploited to provide the negative resistance. The mechanisms for enhancing the Q-factor of the LC tank at millimeter-wave (mm-wave) frequencies are analyzed and applied to optimize the proposed VCO design to obtain a low phase noise. To guarantee accurate oscillating frequencies, distributed interconnections are carefully modeled by EM simulations. Fabricated in a standard 90-nm CMOS process, the proposed VCO achieves a wide tuning range of 20.1 %, from 25 to 30.66 GHz and a low phase noise of -105.47 dBc/Hz at 1-MHz offset. The current of the core circuit is 10.5 mA under a single 1.2-V supply. The core area of the chip is 0.38 mm x 0.24 mm.

• 出版日期2015-6
• 单位东南大学