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AD9858 Based Frequency Synthesizer for Fast Frequency Hopping

Fei Yuan-chun

Abstract

The high performance DDS chip AD9858 produced by Analog Device Inc is adopted to design a frequency synthesizer in this paper. A design scheme of DDS +DSP +SAWO is adopted. The designed synthesizer has low phase noise and high stability SAW oscillator to offer a reference clock for AD9858. The whole system adopts high-performance DSP as the control circuit .The main performance characteristics of AD9858 chip and its application to frequency synthesizer with fast frequency hopping is mainly introduced in detail.

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Key concepts: Frequency synthesizer, Direct digital synthesizer, Phase noise, Electronic engineering, Chip, Frequency-hopping spread spectrum, Phase-locked loop, Computer science