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A 22 GHz cascode CMOS VCO using frequency doubler
Author(s) -
Park Bonghyuk,
Lee Seungsik,
Hong Songcheol,
Choi Sangsung
Publication year - 2007
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.22857
Subject(s) - cascode , voltage controlled oscillator , phase noise , dbc , cmos , electrical engineering , voltage doubler , frequency multiplier , engineering , electronic engineering , microwave , amplifier , voltage , telecommunications , voltage reference , dropout voltage
This paper presents a fully integrated cascode CMOS LC VCO using frequency doubler for oscillating at 22 GHz band. A symmetrical cascode coupling topology is implemented with negative conductance scheme for increasing the quality factor and output swing. Therefore, this architecture improves the phase noise characteristic in 0.18 μm CMOS technology. In order to oscillate at 22 GHz band the frequency doubler (clipper) is used. The measured phase noise is −102.4 dBc/Hz at the 1 MHz offset frequency. The tuning range of 1.32 GHz is obtained with the control voltage from 0.5 to 1.6 V. The current consumption of the VCO and the frequency doubler has 11.8 mA from 1.8 V supply. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2870–2873, 2007; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.22857