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A Modular Phase-Frequency Detector Design with ±2nπ Linear Range of Operation

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Abstract

To extend the linearity range of the phase-frequency detector/charge pump (PFD/CP) circuit, a modular design for a novel PFD architecture is proposed. The new circuit yields a modular extension range of –2Nπ to 2Nπ, where N is an integer representing the order of the PFD/CP extension. The efficacy of the new PFD/CP is demonstrated by the improved frequency acquisition time obtained via closed-loop simulation. Hence, the developed architecture is a good candidate for phase-locked loops requiring the use of PFD/CP with a broad linear range of operation.

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Authors and Affiliations

  1. ADEEC, FCT, University of Algarve, Campus de Gambelas, 8000 Faro, Portugal

    Luis Moura

  2. BORJAK Consulting, UK

    Assaad Borjak

Authors
  1. Luis Moura
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  2. Assaad Borjak
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Correspondence to Luis Moura or Assaad Borjak.

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Moura, L., Borjak, A. A Modular Phase-Frequency Detector Design with ±2nπ Linear Range of Operation. Circuits Syst Signal Process 23, 273–283 (2004). https://doi.org/10.1007/s00034-004-3052-9

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  • DOI: https://doi.org/10.1007/s00034-004-3052-9

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