Experimental Verification of Wandering Spur Suppression Technique in a 4.9 GHz Fractional-N Frequency Synthesizer
Abstract
Apart from the well-known nonlinearity-induced fixed spurs, a DDSM divider-based fractional-N frequency synthesizer can manifest spurs with time-varying frequency offsets from the carrier; these are called wandering spurs. This paper presents experimental results for a 4.9 GHz CP-PLL fractional-N PLL featuring a modified MASH-based divider controller that implements wandering spur suppression. The synthesizer achieves a 20 dB reduction in the spectral envelope of the short-term output phase noise spectrum when compared to the standard MASH DDSM divider controller.
Publication Title
ESSCIRC 2021 - IEEE 47th European Solid State Circuits Conference, Proceedings
Recommended Citation
Mai, D., Donnelly, Y., Kennedy, M., Tulisi, S., Breslin, J., Griffin, P., Connor, M., Brookes, S., Shelly, B., & Keaveney, M. (2021). Experimental Verification of Wandering Spur Suppression Technique in a 4.9 GHz Fractional-N Frequency Synthesizer. ESSCIRC 2021 - IEEE 47th European Solid State Circuits Conference, Proceedings, 439-442. https://doi.org/10.1109/ESSCIRC53450.2021.9567841
