Wide tuning range cmos millimeter-wave vco using resistors-added mosfet varactor
- Authors
- Chang, Ho-Jun; Kim, Sung-Jun; Lim, Chang-Woo; Yun, Tae-Yeoul
- Issue Date
- Aug-2012
- Publisher
- WILEY
- Keywords
- millimeter-wave; MOSFET; varactor; VCO; wide tuning range
- Citation
- MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, v.54, no.8, pp.1777 - 1783
- Indexed
- SCIE
SCOPUS
- Journal Title
- MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
- Volume
- 54
- Number
- 8
- Start Page
- 1777
- End Page
- 1783
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/164969
- DOI
- 10.1002/mop.26983
- ISSN
- 0895-2477
- Abstract
- This article presents a CMOS millimeter-wave voltage-controlled oscillator (VCO), which provides a wide tuning range using a resistors-added MOSFET varactor.Large resistors connected to the source and bulk allow a MOSFET varactor to lower minimum capacitance and to maintain maximum capacitance compared to a conventional MOSFET varactor. Thus, the total capacitance tuning range of the proposed varactor is expanded to +/- 46.1%, allowing a VCO with the new varactor to possess a frequency tuning range of 13.4% from 29.3 to 33.5 GHz. The measured phase noise is -97.8 dBc/Hz at a 1-MHz offset at the center frequency of 31.3 GHz. The VCO in a 0.18-mu m standard CMOS process dissipates 12.6 mW from a 1.8-V supply voltage.
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