A Technical Tutorial on Digital Signal Synthesis

A Technical Tutorialon Digital Signal Synthesis1Copyright ? 1999 Analog Devices, Inc.OutlineSection 1. Fundamentals of DDS technologyTheory of operationCircuit architectureTuning equationElements of DDS circuit functionality and capabilitiesDAC integrationTrends in functional integrationSection 2. Understanding the Sampled Output of a DDS OutputImplications of the Nyquist TheorumAliased images in the outputSource of aliased imagesCalculating the occurrence of aliased imagesQuantization considerationsSin(X)/X responseAC and DC linearity of the outputSection 3. Frequency/phase hopping Capability of DDSCalculating the output tuning wordDetermining maximum tuning resolutionDete max speedUnderstanding the DDS control interfacePre-programming profile registersSection 4. The DDS Output SpectrumThe effect of DAC resolution on spurious performanceect of oversampling on spurious performanceThe effect of truncating the phase accumulator on spurious performanceAdditional DDS Spur sourcesWideband spur performanceNarrowband spur performancePredicting and exploiting spur "sweet spots" in a DDS' tuning rangeJitter and phase noise considerations in a DDS systemOutput filtering considerationsSection 5. High speed Reference Clock ConsiderationsImplications of jitter and phase noise in the reference clockReference clock multipliersSFDR performance vs. the REFCLK Multiplier function2Copyright ? 1999 Analog Devices, Inc.Section 6. Interfacing to the ...