A low phase noise FBAR based multiband VCO design

Guoqiang Zhang, Abhay Kochhar, Keiji Yoshida, Shuji Tanaka, Kenya Hashimoto, Masayoshi Esashi, Haruichi Kanaya, Ramesh K. Pokharel

Research output: Contribution to journalArticle

Abstract

In this letter, design methodlogy of a low phase noise multiband film bulk acoustic resonator (FBAR) based voltage controlled oscillator (FBAR-VCO) is presented. It employs a 1.9GHz cross-coupled FBAR-VCO core, and extends oscillation to 0.65GHz, 0.98GHz, 1.96GHz and 3.92GHz by a divider and a multiplier. By analyzing the low frequency instability and proposing the solution based on a capacitor, cross-coupled architecture is employed in 1.9GHz FBAR-VCO core and phase noise degradation is extensively studied for extended frequencies. By considering the effect of transistors’ size on the Q-factor and impedance of FBAR, excellent phase noise and high loop gain are obtained. The post-layout simulation shows the proposed multiband FBAR-VCO achieves the lowest phase noise below −150dBc/Hz at 1MHz offset frequency.
Original languageEnglish
Pages (from-to)20130425-20130425
Number of pages1
JournalIEICE Electronics Express
Volume10
Issue number13
DOIs
Publication statusPublished - 2013

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    Zhang, G., Kochhar, A., Yoshida, K., Tanaka, S., Hashimoto, K., Esashi, M., Kanaya, H., & Pokharel, R. K. (2013). A low phase noise FBAR based multiband VCO design. IEICE Electronics Express, 10(13), 20130425-20130425. https://doi.org/10.1587/elex.10.20130425