Low phase noise VCO design with symmetrical inductor in CMOS 0.35-μm technology

Hsin Lung Tu, Tsung Yu Yang, Hwann Kaeo Chiou

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

The VCO using differential-driven inductor obtains better performances in many folds such as phase noise, area-saving and higher harmonic rejection. Two VCOs are implemented using 0.35-μm CMOS technology with 25-GHz-ft, 30-GHz-fmax. The figure of merit (FOM) of VCO using differential-driven inductor is eight higher than using single-excited inductor and saving chip area around 50% (without including pads). The VCO with single-ended inductor achieves 320MHz turning range with -4.5 dBm output power and phase noise about -102dBc/Hz at 1MHz offset frequency. The VCO with differential-driven inductor achieves 210MHz turning range with -6.8 dBm output power and phase noise about -112dBc/Hz at 1MHz offset frequency. The core current of these VCOs is 8mA at 2.4-V supply voltage.

Original languageEnglish
Title of host publicationAPMC 2005
Subtitle of host publicationAsia-Pacific Microwave Conference Proceedings 2005
DOIs
StatePublished - 2005
EventAPMC 2005: Asia-Pacific Microwave Conference 2005 - Suzhou, China
Duration: 4 Dec 20057 Dec 2005

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC
Volume2

Conference

ConferenceAPMC 2005: Asia-Pacific Microwave Conference 2005
Country/TerritoryChina
CitySuzhou
Period4/12/057/12/05

Keywords

  • CMOS
  • Differential-driven inductor
  • Phase noise
  • Symmetrical inductor
  • VCO

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