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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)
Ito, Y. ; Precision & Intelligence Lab., Tokyo Inst. of Technol., Yokohama ; Yoshihara, Y. ; Sugawara, H. ; Okada, K.
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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:

Asian Solid-State Circuits Conference, 2005

Date of Conference:

Nov. 2005