Algorithm for determining the parameters of hybrid frequency synthesizers to ensure the lowest level of phase noise of the output signal

Abstract

In frequency planning of hybrid frequency synthesizers based on direct digital and indirect synthesis methods, there is often a situation when a signal with a given value of the output frequency can be achieved by setting several different combinations of synthesizer parameters (division coefficients, multiplication coefficients, transmission coefficients of a digital computing synthesizer). At the same time, the developer has a task to choose one of these combinations. This work is devoted to the development of an algorithm that allows determining the parameters of hybrid frequency synthesizers, the installation of which the hybrid synthesizer will form the output signal with the lowest level of phase noise. When the algorithm used was developed by the authors mathematical model of the power spectral density of phase noise of a hybrid synthesizer of frequencies.