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Conference Paper 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
Language
English
Type
Conference Paper
DOI
https://dx.doi.org/10.1109/APMC.2015.7413380
Project Code
15MI2100, Development of 5G Mobile Communication Technologies for Hyper-connected smart services, Chung Hyun Kyu
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)