A variable inductor using mutual-current control and application to a SiGe 4.5-GHz VCO for wide tuning range

Takahiro Nakamura, Toru Masuda, Akihiro Kodama, Katsuyoshi Washio

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

8 Citations (Scopus)

Abstract

A novel variable inductor using mutual current control was developed and applied to a 4.5-GHz SiGe voltage controlled oscillator (VCO). It consists of a primary inductor, a secondary inductor, and a variable capacitor, and its inductance can be tuned by adjusting the capacitance of the capacitor. It was designed for application to a proposed 4.5-GHz VCO in 0.25-μm SiGe BiCMOS technology. It exhibited a large inductance variation of 22% and a high quality factor of 24 at 4.5 GHz in electro-magnetic simulation. The VCO has a 1.2-GHz tuning range, 32% wider than that of a conventional VCO, and a low phase noise of -121.8 dBc/Hz (at a 1-MHz offset frequency).

Original languageEnglish
Title of host publicationAPMC 2005
Subtitle of host publicationAsia-Pacific Microwave Conference Proceedings 2005
DOIs
Publication statusPublished - 2005 Dec 1
Externally publishedYes
EventAPMC 2005: Asia-Pacific Microwave Conference 2005 - Suzhou, China
Duration: 2005 Dec 42005 Dec 7

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC
Volume2

Other

OtherAPMC 2005: Asia-Pacific Microwave Conference 2005
CountryChina
CitySuzhou
Period05/12/405/12/7

Keywords

  • C-band
  • SiGe HBT
  • VCO
  • Variable inductor
  • W-CDMA
  • Wide tuning range

ASJC Scopus subject areas

  • Engineering(all)

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    Nakamura, T., Masuda, T., Kodama, A., & Washio, K. (2005). A variable inductor using mutual-current control and application to a SiGe 4.5-GHz VCO for wide tuning range. In APMC 2005: Asia-Pacific Microwave Conference Proceedings 2005 [1606398] (Asia-Pacific Microwave Conference Proceedings, APMC; Vol. 2). https://doi.org/10.1109/APMC.2005.1606398