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Dual-band low-phase-noise LC-QVCO using series coupling and switched biasing techniques

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Abstract

An LC-tank quadrature voltage-controlled oscillator (QVCO) is proposed to achieve frequency-band reconfigurability and low phase noise. In this work, phase noise contributed by the 1/f noise of coupling transistors and tail transistors is noticeably reduced when series coupling and switched biasing techniques are simultaneously adopted. The proposed QVCO was implemented in 0.25-μm triple-well CMOS process for K-PCS and WCDMA bands. Measured results showed a phase noise of −117 dBc/Hz at an offset of 1 MHz and a phase-noise figure-of-merit of −172 dBc/Hz while consuming 8.13 mA from a 2-V power supply.

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Acknowledgments

This work (No. 2012-2006441) was supported by Basic Science Research Program through the NRF grant funded by the MEST.

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Authors and Affiliations

  1. Hanyang University, Seoul, Republic of Korea

    Ho-Jun Chang & Tae-Yeoul Yun

  2. RFHIC, Suwon, Korea

    Ki-Won Kim

  3. LG Electronics, Seoul, Korea

    Jin-Hong Park

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  1. Ho-Jun Chang
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  2. Ki-Won Kim
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  3. Jin-Hong Park
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  4. Tae-Yeoul Yun
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Correspondence to Tae-Yeoul Yun.

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Chang, HJ., Kim, KW., Park, JH. et al. Dual-band low-phase-noise LC-QVCO using series coupling and switched biasing techniques. Analog Integr Circ Sig Process 73, 955–960 (2012). https://doi.org/10.1007/s10470-012-9903-y

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  • DOI: https://doi.org/10.1007/s10470-012-9903-y

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