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2010•Computer & NetworkRequires access

Method and Application of Spurious Rejection of DDS

Yang Jian-yong, Liu Hongwei

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Abstract

This paper introduces and simulates the method of phase-shake to the effect of spurious rejection by analyzing two main origins of spurious:quantity-error and phase-truncation,starting with the internal principle of direct digital frequency synthesizer (DDS) circuit.Combining with phase locked loop technology(PLL),it also introduces the optimization method of DDS+PLL,starting with the external principle of DDS.The engineering practice proves that the ideal output signal with low spurious and small step can be obtained by using this method.

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What this paper is about

This paper introduces and simulates the method of phase-shake to the effect of spurious rejection by analyzing two main origins of spurious:quantity-error and phase-truncation,starting with the internal principle of direct digital frequency synthesizer (DDS) circuit.Combining with phase locked loop technology(PLL),it also introduces the optimization method of DDS+PLL,starting with the external principle of DDS.The engineering practice proves that the ideal output signal with low spurious and small step can be obtained by using this method.

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Available abstract

This paper introduces and simulates the method of phase-shake to the effect of spurious rejection by analyzing two main origins of spurious:quantity-error and phase-truncation,starting with the internal principle of direct digital frequency synthesizer (DDS) circuit.Combining with phase locked loop technology(PLL),it also introduces the optimization method of DDS+PLL,starting with the external principle of DDS.The engineering practice proves that the ideal output signal with low spurious and small step can be obtained by using this method.

Key concepts: Spurious relationship, Computer science, Phase-locked loop, Direct digital synthesizer, Ideal (ethics), Truncation (statistics), SIGNAL (programming language), Algorithm

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