A 1.2-3.2 GHz CMOS VCO IC utilizing transformer-based variable inductors and amos varactors

Qing Liu, Yusuke Takigawa, Satoshi Kurachi, Nobuyuki Itoh, Toshihiko Yoshimasu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A novel resonant circuit consisting of transformer-based switched variable inductors and switched accumulationMOS (AMOS) varactors is proposed to realize an ultrawide tuning range voltage-controlledoscillator (VCO). The VCO IC is designed and fabricated using 0.11 μm CMOS technology and fully evaluated on-wafer. The VCO exhibits a frequency tuning range as high as 92.6% spanning from 1.20 GHz to 3.27 GHz at an operation voltage of 1.5V. The measured phase noise of -120 dBc/Hz at 1MHz offset from the 3.1 GHz carrier is obtained.

Original languageEnglish
Pages (from-to)568-573
Number of pages6
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
VolumeE94-A
Issue number2
DOIs
Publication statusPublished - 2011 Feb

Fingerprint

Varactors
Transformer
Voltage
Electric potential
Tuning
Resonant circuits
Phase Noise
Phase noise
Wafer
Range of data

Keywords

  • AMOS varactor
  • CMOS
  • Transformer-based variable inductor
  • Wide-tuning range

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Graphics and Computer-Aided Design
  • Applied Mathematics
  • Signal Processing

Cite this

A 1.2-3.2 GHz CMOS VCO IC utilizing transformer-based variable inductors and amos varactors. / Liu, Qing; Takigawa, Yusuke; Kurachi, Satoshi; Itoh, Nobuyuki; Yoshimasu, Toshihiko.

In: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E94-A, No. 2, 02.2011, p. 568-573.

Research output: Contribution to journalArticle

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