A 1.2-3.2GHz CMOS VCO IC Utilizing Transformer-Based Variable Inductors and AMOS Varactors

Qing LIU; Yusuke TAKIGAWA; Satoshi KURACHI; Nobuyuki ITOH; Toshihiko YOSHIMASU

doi:10.1587/transfun.E94.A.568

Special Section on Analog Circuit Techniques and Related Topics

A 1.2-3.2GHz CMOS VCO IC Utilizing Transformer-Based Variable Inductors and AMOS Varactors

Qing LIU, Yusuke TAKIGAWA, Satoshi KURACHI, Nobuyuki ITOH, Toshihiko YOSHIMASU

著者情報

キーワード: AMOS varactor, CMOS, transformer-based variable inductor, wide-tuning range

ジャーナル認証あり

2011 年 E94.A 巻 2 号 p. 568-573

DOI https://doi.org/10.1587/transfun.E94.A.568

詳細

抄録

A novel resonant circuit consisting of transformer-based switched variable inductors and switched accumulation MOS (AMOS) varactors is proposed to realize an ultrawide tuning range voltage-controlled-oscillator (VCO). The VCO IC is designed and fabricated using 0.11µm CMOS technology and fully evaluated on-wafer. The VCO exhibits a frequency tuning range as high as 92.6% spanning from 1.20GHz to 3.27GHz at an operation voltage of 1.5V. The measured phase noise of -120dBc/Hz at 1MHz offset from the 3.1GHz carrier is obtained.

責任著者(Corresponding author)

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