A wide-tuning-range VCO with small VCO-gain fluctuation for multi-band W-CDMA RFIC

Takahiro Nakamura, Toru Masuda, Nobuhiro Shiramizu, Katsuyoshi Washio, Tomomitsu Kitamura, Norio Hayashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Citations (Scopus)

Abstract

A novel wide-tuning-range LC-tuned voltagecontrolled oscillator (LC-VCO)-featuring small VCO-gain (K vco) fluctuation-was developed. For small K vco fluctuation, a serial LC-resonator that consists of an inductor, a fine-tuning varactor, and a capacitor bank was added to a conventional parallel LC-resonator that uses a capacitor bank scheme. The resonator was applied to a 3.9-GHz VCO for multi-band W-CDMA RFIC fabricated with 0.25-μm SiBiCMOS technology. The VCO exhibited K vco fluctuation of only 21%, which is one third that of a conventional VCO, with 34% tuning range. The VCO also exhibited a low phase noise of -121 dBc/Hz at 1-MHz offset frequency and a low current consumption of 4.0 mA.

Original languageEnglish
Title of host publicationESSCIRC 2006 - Proceedings of the 32nd European Solid-State Circuits Conference
Pages448-451
Number of pages4
DOIs
Publication statusPublished - 2006 Dec 1
Externally publishedYes
EventESSCIRC 2006 - 32nd European Solid-State Circuits Conference - Montreux, Switzerland
Duration: 2006 Sep 192006 Sep 21

Publication series

NameESSCIRC 2006 - Proceedings of the 32nd European Solid-State Circuits Conference

Other

OtherESSCIRC 2006 - 32nd European Solid-State Circuits Conference
Country/TerritorySwitzerland
CityMontreux
Period06/9/1906/9/21

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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