A 40-GHz Wide-Tuning-Range VCO in 0.18-~m CMOS

@article{Chien2006A4W,
  title={A 40-GHz Wide-Tuning-Range VCO in 0.18-~m CMOS},
  author={Jun-Chau Chien and Liang-Hung Lu},
  journal={2006 Symposium on VLSI Circuits, 2006. Digest of Technical Papers.},
  year={2006},
  pages={178-179}
}
A 40-GHz wideband VCO is demonstrated in a standard 0.18-mum CMOS technology. In order to achieve wide tuning range at millimeter-wave frequencies, a non-uniform standing-wave VCO with a switched-transmission line architecture is proposed. By switching the length of the transmission line, a frequency tuning range of 7.5 GHz is achieved for the 40-GHz VCO design while maintaining a phase noise better than -96 dBc/Hz at 1-MHz offset 

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