Frequency Synthesis for Integrated Transceivers

  • Jan-Wim Eikenbroek
  • Sven Mattisson


With the recent increase in radio transceiver integration levels it has become feasible to use more complex frequency synthesizer structures. The use of a fractional-N synthesizer decouples the channel spacing from the choice of synthesizer reference frequency which enables much faster frequency hopping. Static moduli synthesizers have required complex spurious compensation methods, but recently, ΔΣ-dithered moduli fractional-N synthesizers have attracted a lot of attention as no analog spurious-compensation circuits are needed. Design equations for the analog parts of a ΔΣ-based synthesizer are presented together with a discussion on practical implementation aspects.


Phase Detector Reference Frequency Loop Filter Channel Spacing Frequency Synthesizer 
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Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • Jan-Wim Eikenbroek
    • 1
  • Sven Mattisson
    • 2
  1. 1.Ericsson Radio Systems B.V.EmmenThe Netherlands
  2. 2.Ericsson Mobile Communications ABLundSweden

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