Polynomial Model for Computing Noise Levels in Frequency Synthesisers

The article describes principles of operation behind frequency synthesisers with fractional-N dividers. We analysed noise characteristics of all the elements the synthesisers comprise. We developed a polynomial model for computing noise levels in frequency synthesisers. We present the results of simulating phase noises by the polynomial method for all circuit elements, as well as a comparison of these results to simulation performed in the ADIsimPLL software package

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