A 47 GHz LC Cross-Coupled VCO Employing High-Q Island-Gate Varactor for Phase Noise Reduction
- Authors
- Kim, Namhyung; Oh, Yongho; Rieh, Jae-Sung
- Issue Date
- 2월-2010
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Phase noise; varactor; voltage controlled oscillator (VCO)
- Citation
- IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, v.20, no.2, pp.94 - 96
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
- Volume
- 20
- Number
- 2
- Start Page
- 94
- End Page
- 96
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/117049
- DOI
- 10.1109/LMWC.2009.2038522
- ISSN
- 1531-1309
- Abstract
- A 47 GHz cross-coupled voltage controlled oscillator (VCO) employing the high-island-gate varactor (IGV) based on a 0.13 mu m RFCMOS technology is reported in this work. To verify the improvement in the phase noise, two otherwise identical VCOs, each with an IGV and a conventional multi-finger varactor, were fabricated and the phase noise performance was compared. With V-DD of 1.2 V and core power consumption of 3.86 mW, the VCOs with the IGV and the multi-finger varactor have a phase noise of 95.4 dBc/Hz and 91.4 dBc/Hz respectively, at 1 MHz offset, verifying the phase noise reduction with the introduction of the high-Q IGV. The VCO with IGV exhibited an output power of around 15 dBm, leading to a FoM of 182.9 dBc/Hz and a tuning range of 3.35% (45.69 to 47.22 GHz).
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