The noise and spur delusion in fractional-N frequency synthesizer design
Abstract
The standard design methodology for fractional-N frequency synthesizers assumes that the filtered shaped quantization noise from the requantizer is masked below the spectral envelope of the underlying integer-N synthesizer. Fractional-N frequency synthesizers are notorious for exhibiting an elevated noise floor and an unpredictable pattern of spurs. In this paper, we argue that designers should not be deluded by the overly conservative predictions of the simplified linear model but should instead consider nonlinearities as early as possible in the design process.
Publication Title
Proceedings - IEEE International Symposium on Circuits and Systems
Recommended Citation
Kennedy, M., Mo, H., Li, Z., Hu, G., Scognamiglio, P., & Napoli, E. (2015). The noise and spur delusion in fractional-N frequency synthesizer design. Proceedings - IEEE International Symposium on Circuits and Systems, 2015-July, 2577-2580. https://doi.org/10.1109/ISCAS.2015.7169212
