(INVITED) analysis and modeling of noise folding and spurious emission in wideband fractional-N synthesizers

Waleed Khalil, Hiva Hedayati, Bertan Bakkaloglu, Sayfe Kiaei

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

Fraetional-N synthesizers are subject to generation of undesired spurious energy due to both linear and nonlinear processes. Previously, we presented an accurate modeling of the nonlinear, time-varying nature of the phase frequency detector (PFD), charge pump and frequency divider [1]. The proposed modeling technique was able to predict in-band spur power levels within 1.8 dB accuracy. In this paper we demonstrate using the proposed model that the close-in phase noise increase due intermodulation of the ΣΔ high frequency quantization noise is independent of the synthesizer reference frequency, which is in contrast to commonly used linear models. A behavioral model is also used to show that the more detrimental near-integer in-band spurs can be generated by cross-coupling between the synthesizers's various building blocks.

Original languageEnglish (US)
Title of host publicationProceedings of the 2008 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2008
Pages291-294
Number of pages4
DOIs
StatePublished - Sep 22 2008
Event2008 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2008 - Atlanta, GA, United States
Duration: Jun 15 2008Jun 17 2008

Publication series

NameDigest of Papers - IEEE Radio Frequency Integrated Circuits Symposium
ISSN (Print)1529-2517

Other

Other2008 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2008
CountryUnited States
CityAtlanta, GA
Period6/15/086/17/08

Keywords

  • Fractional-N frequency synthesizers
  • Phase noise
  • Quantization noise
  • Sigma-delta modulation
  • Spurious emissions

ASJC Scopus subject areas

  • Engineering(all)

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    Khalil, W., Hedayati, H., Bakkaloglu, B., & Kiaei, S. (2008). (INVITED) analysis and modeling of noise folding and spurious emission in wideband fractional-N synthesizers. In Proceedings of the 2008 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2008 (pp. 291-294). [4561438] (Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium). https://doi.org/10.1109/RFIC.2008.4561438