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A Method to Improve the Phase Noise of Frequency Synthesizer Based on PLL

Naichang Yuan

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Abstract

The synthesizer,based on digital phase-locked loop(DPLL),has wide yang application in modern electronic technology,shch as communication,radar etc.To reduce phase noise of microwave-band frequency synthesizer,the paper introduces the method of frequency conversion and phase-lock.Then,the compatible loop filter is designed.Finally,the results of experiments prove the phase noise of frequency conversion and phase-locked synthesizer is greatly lower than that of direct phase-ocked synthesizer.

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What this paper is about

The synthesizer,based on digital phase-locked loop(DPLL),has wide yang application in modern electronic technology,shch as communication,radar etc.To reduce phase noise of microwave-band frequency synthesizer,the paper introduces the method of frequency conversion and phase-lock.Then,the compatible loop filter is designed.Finally,the results of experiments prove the phase noise of frequency conversion and phase-locked synthesizer is greatly lower than that of direct phase-ocked synthesizer.

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Available abstract

The synthesizer,based on digital phase-locked loop(DPLL),has wide yang application in modern electronic technology,shch as communication,radar etc.To reduce phase noise of microwave-band frequency synthesizer,the paper introduces the method of frequency conversion and phase-lock.Then,the compatible loop filter is designed.Finally,the results of experiments prove the phase noise of frequency conversion and phase-locked synthesizer is greatly lower than that of direct phase-ocked synthesizer.

Key concepts: Phase-locked loop, Frequency synthesizer, Direct digital synthesizer, Phase noise, DPLL algorithm, PLL multibit, Electronic engineering, Noise (video)

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