A 47 GHz LC cross-coupled VCO employing high-Q island-gate varactor for phase noise reduction

Namhyung Kim, Yongho Oh, Jae Sung Rieh

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A 47 GHz LC cross-coupled voltage controlled oscillator (VCO) employing the high-Q island-gate varactor (IGV) based on a 0.13 μm RFCMOS technology is reported in this work. To verify the improvement in the phase noise, two otherwise identical VCOs, each with an IGV and a conventional multi-finger varactor, were fabricated and the phase noise performance was compared. With VDD of 1.2 V and core power consumption of 3.86 mW, the VCOs with the IGV and the multi-finger varactor have a phase noise of -95.4 dBc/Hz and -91.4 dBc/Hz respectively, at 1 MHz offset, verifying the phase noise reduction with the introduction of the high-Q IGV. The VCO with IGV exhibited an output power of around -15 dBm, leading to a FoM of -182.9 dBc/Hz and a tuning range of 3.35% (45.69 to 47.22 GHz).

Original languageEnglish
Article number5392992
Pages (from-to)94-96
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume20
Issue number2
DOIs
Publication statusPublished - 2010 Feb

Keywords

  • Phase noise
  • Varactor
  • Voltage controlled oscillator (VCO)

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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