Mitigation of “horn spurs” in a MASH-based fractional-N CP-PLL
V Mazzaro, MP Kennedy - … on Circuits and Systems II: Express …, 2020 - ieeexplore.ieee.org
V Mazzaro, MP Kennedy
IEEE Transactions on Circuits and Systems II: Express Briefs, 2020•ieeexplore.ieee.orgA Fractional-N Charge Pump (CP) PLL with a Multi-stAge noise SHaping (MASH) 1-1-1
divider controller has been reported to exhibit pairs of spurious tones called “horn spurs”.
The phenomenon has been confirmed in measurements on a commercial wideband
synthesizer. This brief presents an analysis of the phenomenon and techniques to mitigate it.
MATLAB simulation results are presented for a type-II CP-PLL with a third order MASH
Digital ΔΣ Modulator (DDSM) to validate the techniques that are shown. Measurement …
divider controller has been reported to exhibit pairs of spurious tones called “horn spurs”.
The phenomenon has been confirmed in measurements on a commercial wideband
synthesizer. This brief presents an analysis of the phenomenon and techniques to mitigate it.
MATLAB simulation results are presented for a type-II CP-PLL with a third order MASH
Digital ΔΣ Modulator (DDSM) to validate the techniques that are shown. Measurement …
A Fractional-N Charge Pump (CP) PLL with a Multi-stAge noise SHaping (MASH) 1-1-1 divider controller has been reported to exhibit pairs of spurious tones called “horn spurs”. The phenomenon has been confirmed in measurements on a commercial wideband synthesizer. This brief presents an analysis of the phenomenon and techniques to mitigate it. MATLAB simulation results are presented for a type-II CP-PLL with a third order MASH Digital ΔΣ Modulator (DDSM) to validate the techniques that are shown. Measurement results are also presented.
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