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A dual-band quadrature VCO with gain proportional to oscillation frequency

A dual-band quadrature VCO with gain proportional to oscillation frequency
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摘要 This paper presents a novel dual-band quadrature voltage controlled oscillator(VCO) with the gain proportional to the oscillation frequency.Frequency synthesizers with this VCO can reduce the bandwidth fluctuation over all the frequency ranges without compensation or calibration.Besides the original switched capacitor array, an extra switched varactor array is adopted for the implementation of the proposed VCO.The tuning technique of changing the values of the capacitor and varactor at the same ratio is also derived.For verification purposes, a 2.5 G/3.5 G dual-band quadrature VCO is fabricated in a 0.13μm CMOS process for WiMAX applications. Measurement results show that the VCO gain is closely proportional to the oscillation frequency with±16%variation over the entire frequency range.The phase noise is -138.15 dBc/Hz at 10 MHz from the 2.5 GHz carrier and -137.44 dBc/Hz at 10 MHz from the 3.5 GHz carrier. This paper presents a novel dual-band quadrature voltage controlled oscillator(VCO) with the gain proportional to the oscillation frequency.Frequency synthesizers with this VCO can reduce the bandwidth fluctuation over all the frequency ranges without compensation or calibration.Besides the original switched capacitor array, an extra switched varactor array is adopted for the implementation of the proposed VCO.The tuning technique of changing the values of the capacitor and varactor at the same ratio is also derived.For verification purposes, a 2.5 G/3.5 G dual-band quadrature VCO is fabricated in a 0.13μm CMOS process for WiMAX applications. Measurement results show that the VCO gain is closely proportional to the oscillation frequency with±16%variation over the entire frequency range.The phase noise is -138.15 dBc/Hz at 10 MHz from the 2.5 GHz carrier and -137.44 dBc/Hz at 10 MHz from the 3.5 GHz carrier.
出处 《Journal of Semiconductors》 EI CAS CSCD 2013年第8期84-89,共6页 半导体学报(英文版)
基金 supported by the National Natural Science Foundation of China(No.61106025) the National High Technology Research & Development Program of China(No.2012 AAO12301)
关键词 VCO dual-band tuning technique constant bandwidth VCO dual-band tuning technique constant bandwidth
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参考文献17

  • 1Lu T Y, Chen W Z. A 3-10 GHz, 14 bands CMOS frequency synthesizer with spurs reduction for MB-OFDM UWB system. IEEE Tran Very Large Scale Integration (VLSI) Syst, 2012, 20: 948.
  • 2Catli B, Hella M M. A 1.94 to 2.55 GHz, 3.6 to 4.77 GHz tun- able CMOS VCO based on double-tuned, double-driven coupled resonators. IEEE J Solid-State Circuits, 2009, 44:2463.
  • 3Park E C, Hauspie D, Craninckx J. Wideband VCO with simul- taneous switching of frequency band, active core, and varactor size. IEEE J Solid-State Circuits, 2007, 42:1472.
  • 4Xiao Shimao, Ma Chengyan, Ye Tianchun. A novel 2.95-3.65 GHz CMOS LC-VCO using tuning curve compensation. Journal of Semiconductors, 2009, 30(10): 105001.
  • 5Li Bin, Fan Xiangning, Wang Zhigong. A wideband LC-VCO with small VCO gain variation and adaptive power control. Jour- nal of Semiconductors, 2012, 33(10): 105008.
  • 6Lu L, Chen J, Yuan L, et al. An 18-mW 1.175-2-GHz frequencysynthesizer with constant bandwidth for DVB-T tuners. IEEE Trans Microw Theory Tech, 2009, 57(4): 928.
  • 7Hauspie D, Park E C, Craninckx J. Wideband VCO with simul- taneous switching of frequency band, active core, and varactor size. IEEE J Solid-State Circuits, 2007, 42:1472.
  • 8Zhang H. Research into design techniques of reconfigurable phase-locked loop based on standard CMOS technology. Doctor Thesis, Institute of Electronics, Chinese Academic of Sciences 2011 (in Chinese).
  • 9Akamine Y, Kawabe M, Hori K, et al. Delta-sigma PLL transmit- ter with a loop-bandwidth calibration system. IEEE J Solid-State Circuits, 2008, 43" 497.
  • 10Rao A, Mansour M, Singh G, et al. A 45.4 GHz LC PLL with adaptive bandwidth control for a forwarded clock link. IEEE J Solid-State Circuits, 2008, 43:2099.

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