Theory and Modeling of Direct Digital Synthesizers

The article considers the problems of the design of direct digital synthesizers, based on the method of the direct dig-ital frequency and signal synthesis, the calculation of phase changes in DDS. Block and functional electrical diagrams of a direct digital synthesizer are presented. Basic formulas for the calculation of spurious spectral components levels in DDS, while forming complex signals, are given. Structures of DDS with the switching of phase samples and DDS with quadrature outputs are presented.

Authors: E.S.Klyuzhev, I.V.Ryabov, I.V.Strelnikov, P.M.Yuriev

Direction: Радиотехнические средства передачи, приема и обработки сигналов

Keywords: Direct digital frequency and signal synthesis, digital synthesizers, amplitude noise level, phase noise, digital storage, digital-to-analog converter, functional generator x-sin(x), low-pass filter, multilevel signals, level of spurious spectral components, FM signal

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