Liu Zhenxing
Abstract
This paper discusses the realization plan of the frequency synthesisis source by means of the direct digital synthesis(DDS)AD9850 and phase—locked—loop(PLL)MB1504,recommends the matters needing attention in hardware design,and analyses the phase noise and spurious characteristics of the system,fi nally gives the test results of the system.
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This paper discusses the realization plan of the frequency synthesisis source by means of the direct digital synthesis(DDS)AD9850 and phase—locked—loop(PLL)MB1504,recommends the matters needing attention in hardware design,and analyses the phase noise and spurious characteristics of the system,fi nally gives the test results of the system.
Key concepts: Phase-locked loop, Direct digital synthesizer, Computer science, PLL multibit, Realization (probability), Spurious relationship, Frequency synthesizer, Phase noise