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A 28-GHz, -187.4-dBc/Hz-FOMT Low-Phase-Noise CMOS VCO Using an Amplitude-Redistribution Technique
Yusuke WACHI Toshiyuki NAGASAKU Hiroshi KONDOH
IEICE TRANSACTIONS on Electronics
Publication Date: 2012/06/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
millimeter-wave, CMOS, VCO, phase-noise,
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An amplitude-redistribution technique – which improves phase-noise performance of millimeter (mm)-wave and quasi mm-wave cross-coupled VCOs by controlling the distribution of voltage swings on the oscillator nodes – is proposed. A 28-GHz VCO, fabricated in 0.13-µm CMOS technology, uses this technique and demonstrates low phase-noise performance of -112.9-dBc/Hz at 1-MHz offset and FOMT of -187.4-dBc/Hz, which is the highest FOMT so far reported in regard to CMOS VCOs operating above 25 GHz.