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A Low-Power 50-GHz LC-VCO in a 65-nm CMOS Technology
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- Authors
- Hui Dong Lee, Sunwoo Kong, Moon-Sik Lee, Bonghyuk Park
- Issue Date
- 2015-12
- Citation
- Asia-Pacific Microwave Conference (APMC) 2015, pp.1743-1745
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- A low-power 50-GHz LC-VCO has been presented. Throughout EM analysis, an inductor having a quality factor of 14.3 was implemented with a microstrip line. The analyzed characteristics of a MOS varactor limit the LC tank performance due to its low quality factor. In order to overcome the LC tank performance and operate at low-power consumption, the negative transconductance stage was evaluated in various ways and found at the condition of the optimized MOSFET size and bias point. The proposed VCO was implemented in a 65-nm CMOS technology. The measurement results show a frequency range of 48.61 GHz ~ 50.84 GHz and an output power of-10 dBm. The required VCO current is about 4.7 mA from a 0.7 V supply.
- KSP Keywords
- CMOS Technology, EM analysis, Frequency Range, LC tank, LC voltage controlled oscillator(LC-VCO), Low quality, MOS varactor, Microstrip Line, Negative transconductance, Output power, Quality-factor(Q-factor)