An improved fractional divider for fractional-N frequency synthesizers

Wei Zhang; Yang Liu; Yongqi Zhou

doi:10.1117/12.835259

4 August 2009 An improved fractional divider for fractional-N frequency synthesizers

Wei Zhang, Yang Liu, Yongqi Zhou

Proceedings Volume 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications; 738329 (2009) https://doi.org/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.

Citation Download Citation

Wei Zhang, Yang Liu, and 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 (4 August 2009); https://doi.org/10.1117/12.835259

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