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2009•Journal of China Academy of Electronics and Information TechnologyRequires access

Design of a Small Step and Low Phase Noise Frequency Synthesizer

Jing Li

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Abstract

A kind of frequency synthesizer with characteristics of wideband,small frequency step,high stability and low phase noise,is designed with Comprehensive application of PLL and DDS technologies.Main technical specifications of the frequency synthesizer are as follows: frequency step of 1 Hz,maximum error of frequency control of better than 4.5×10-4 Hz,and phase noise of-100 dBc/Hz@10 kHz.Comparing with the traditional design method consisting of multi-loops,it can better meet stronger integration,low-cost and all-purpose requirements.And this can greatly improve efficiency of circuit debugging.

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What this paper is about

A kind of frequency synthesizer with characteristics of wideband,small frequency step,high stability and low phase noise,is designed with Comprehensive application of PLL and DDS technologies.Main technical specifications of the frequency synthesizer are as follows: frequency step of 1 Hz,maximum error of frequency control of better than 4.5×10-4 Hz,and phase noise of-100 dBc/Hz@10 kHz.Comparing with the traditional design method consisting of multi-loops,it can better meet stronger integration,low-cost and all-purpose requirements.And this can greatly improve efficiency of circuit debugging.

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Available abstract

A kind of frequency synthesizer with characteristics of wideband,small frequency step,high stability and low phase noise,is designed with Comprehensive application of PLL and DDS technologies.Main technical specifications of the frequency synthesizer are as follows: frequency step of 1 Hz,maximum error of frequency control of better than 4.5×10-4 Hz,and phase noise of-100 dBc/Hz@10 kHz.Comparing with the traditional design method consisting of multi-loops,it can better meet stronger integration,low-cost and all-purpose requirements.And this can greatly improve efficiency of circuit debugging.

Key concepts: Frequency synthesizer, Phase noise, dBc, Direct digital synthesizer, Wideband, Phase-locked loop, Electronic engineering, Computer science

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