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Article: Design and characterization of a 5.2 GHz/2.4 GHz [summation][DELTA] fractional-N frequency synthesizer for low-phase noise performance.(Report)
- Article from:
- EURASIP Journal on Wireless Communications and Networking
- Article date:
- January 1, 2006
- Author:
CopyrightCOPYRIGHT 2006 Hindawi Publishing Corp. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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This paper presents a complete noise analysis of a [summation][DELTA]-based fractional-N phase-locked loop (PLL) based frequency synthesizer. Rigorous analytical and empirical formulas have been given to model various phase noise sources and spurious components and to predict their impact on the overall synthesizer noise performance. These formulas have been applied to an integrated multiband WLAN frequency synthesizer RFIC to demonstrate noise minimization through judicious choice of loop parameters. Finally, predicted and measured phase jitter showed good agreement. For an LO frequency of 4.3GHz, predicted and measured phase noise was 0.50[degrees] rms and ...