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A Constant Loop Bandwidth Fraction-N Frequency Synthesizer for GNSS Receivers

  • Dun Yan
  • Jiancheng Li
  • Xiaochen Gu
  • Songting Li
  • Chong Huang
Part of the Communications in Computer and Information Science book series (CCIS, volume 396)

Abstract

A fully integrated 2.8 GHz to 3.4 GHz frequency synthesizer for satellite navigation RF resciever is implemented in 0.18-μm CMOS process and its area is 0.4 mm2. A constant and low tuning Gain (KVCO) is achieved by an improved voltage-controlled oscillator (VCO) architecture. The constant loop bandwidth, which is designed to 60 kHz, is implemented by making charge pump current (ICP) match the division ratio N. The synthesizer exhibits phase noise of -85.62 dBc/Hz at 10 KHz offset and -92.78 dBc/Hz at 100 kHz offset, while consuming 18 mW from a 1.8 V supply.

Keywords

Frequency synthesizer voltage-controlled oscillator (VCO) phase noise bandwidth 

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References

  1. 1.
    Salvatore, L., Carlo, S., Andrea, B., et al.: Frequency dependence on bias current in 5-GHz CMOS VCOs: Impact on tuning range and flicker noise upconversion. IEEE J. Solid-State Circuits 37(8), 1003–1011 (2002)CrossRefGoogle Scholar
  2. 2.
    Kim, J., Horowitz, M.A., Wei, G.Y.: Design of CMOS adaptive bandwidth PLL/DLLs:A general approach. IEEE J. Solid-State Circuits 50, 860 (2003)Google Scholar
  3. 3.
    Xizhen, Y., Shimao, X., Yuhua, J., Qiwu, W., Chengyan, M., Tianchun, Y.: A constant loop bandwidth fractional- frequency synthesizer for GNSS receivers. JournaI of Semiconductors 33(4) (2012)Google Scholar
  4. 4.
    Lei, L., Jinghong, C., Yuan, L., Hao, M., Zhangwen, T.: An 18-mW 1.175–2-GHz Frequency Synthesizer with Constant Bandwidth for DVB-T Tuners. IEEE Transactions on Microwave Theory and Techniques 57(4) (April 2009)Google Scholar
  5. 5.
    Jaewook, S., Hyunchol, S.: A fast and high-precision VCO frequency calibration technique for wideband ΔΣ fractional-N frequency synthesizers. IEEE Transactions on Circuits and Systems-I: Regular Papers 57(7) (July 2010)Google Scholar
  6. 6.
    Jongsik, K., Jaewook, S., Seungsoo, K., Hyunchol, S.: A wideband CMOS LC-VCO with linearized coarse tuning characteristics. IEEE Transactions Circuits and Systems-II: Express Briefs 55(5), 399–403 (2008)CrossRefGoogle Scholar
  7. 7.
    Rhee, W.: Design of high-performance CMOS charge pumps in phase-locked loops. In: IEEE Int Circuits Syst. Symp., vol. 2, pp. 545–548 (1999)Google Scholar
  8. 8.
    Lee, J., Keel, M., Lim, S., et al.: Charge pump with perfect current matching characteristics in phase-locked loops. Electronics Letters 36, 1907–1908 (2000)CrossRefGoogle Scholar
  9. 9.
    Wu, T., Hanumolu, P.K., Mayaram, K.: Method for a constant loop bandwidth in LC.VCO PLL frequency synthesizers. IEEE J. Solid-State Circuits 44, 427 (2009)CrossRefGoogle Scholar
  10. 10.
    Cheng, K.W., Natarajan, K., Allstot, D.J.: A current reuse quadrature GPS receiver in 0.13μm CMOS. IEEE J. Solid-State Circuits 45, 510 (2010)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Dun Yan
    • 1
  • Jiancheng Li
    • 1
  • Xiaochen Gu
    • 1
  • Songting Li
    • 1
  • Chong Huang
    • 1
  1. 1.School of Electronic Science and EngineeringNational University of Defense TechnologyChangshaChina

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