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A 1.3-2.8 GHz Wide Range CMOS LC-VCO Using Variable Inductor

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5 Author(s)
Yusaku Ito ; Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259-R2-17 Nagatsuta, Midori-ku, Yokohama 226-8503 Japan. Tel & Fax: +81-45-924-5031, E-mail: y ; Yoshiaki Yoshihara ; Hirotaka Sugawara ; Kenichi Okada
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This paper proposes a novel wide-range tunable CMOS voltage controlled oscillator (VCO). VCO uses an on-chip variable inductor and switched capacitors as variable elements. The VCO was fabricated using a standard 0.18mum CMOS process with five metal layers. The oscillation frequency can be tuned from 1.28 GHz to 2.75 GHz with tuning range of 72%. The proposed VCO operates with low phase noise, and it achieves high FOMT -205.9 dBc/Hz

Published in:

2005 IEEE Asian Solid-State Circuits Conference

Date of Conference:

Nov. 2005