access icon free Analytic signal model for flip-flop based phase-frequency detectors

Flip-flop based phase-frequency detectors are widely used in phase-locked loop circuits. These devices are usually assumed to behave linearly although they consist of non-linear parts. In this work, a flip-flop based phase-frequency detector circuit is analysed. Analytic output signal models are derived for arbitrary input signal frequencies and phases. Exact and approximate closed-form solutions are found for different frequency ratios. The model is validated by numerical time-domain simulations.

Inspec keywords: phase detectors; numerical analysis; time-domain analysis; flip-flops

Other keywords: arbitrary input signal frequency; numerical time-domain simulation; analytic output signal model; phase-locked loop circuit; flip-flop; phase-frequency detector circuit

Subjects: Other numerical methods; Logic circuits; Modulators, demodulators, discriminators and mixers

References

    1. 1)
      • 1. Best, R.E.: ‘Phase-locked loops’ (McGraw-Hill, New York, NY, USA, 2007, 6th edn.).
    2. 2)
    3. 3)
      • 2. Gardner, F.M.: ‘Phaselock techniques’ (Wiley, Hoboken, NJ, USA, 2005, 3rd edn.).
    4. 4)
      • 6. Frankiewicz, M., Golda, A., Kos, A.: ‘Design of CMOS analog and digital phase-locked loops based on resonant VCO’. Proc. of the 17th Int. Conf. Mixed Design of Integrated Circuits and Systems (MIXDES), Wroclaw, Poland, June 2010, pp. 247250.
    5. 5)
      • 5. Analog Devices: ‘ADF4356 – 6.8 GHz Wideband Synthesizer with Integrated VCO’, rev. A, 2017.
    6. 6)
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2017.4113
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