5 August 2009 An improved fractional divider for fractional-N frequency synthesizers
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Proceedings Volume 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications; 738329 (2009); doi: 10.1117/12.835259
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China
Abstract
This paper presents an improved fractional divider used in 1.8~2GHz fractional-N frequency synthesizers. A new clock setting for delta-sigma modulator (DSM) is proposed to prevent the potential problems of traditional fractional dividers: the DSM output would be wrongly loaded and the action of DSM circuit may affect the phase-detection of phase-frequency-detector (PFD). Simulation result shows the effectiveness of this improvement.
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Wei Zhang, Yang Liu, Yongqi Zhou, "An improved fractional divider for fractional-N frequency synthesizers", Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 738329 (5 August 2009); doi: 10.1117/12.835259; https://doi.org/10.1117/12.835259
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KEYWORDS
Clocks

Switching

Modulators

Current controlled current source

Electronics engineering

Information and communication technologies

Infrared imaging

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