A Q-band low phase noise voltage controlled oscillator using balanced π-feedback in 2-μm GaAs HBT process

Chi Hsein Lin, Kung Hao Liang, Hong Yeh Chang, Yi Jen Chan, Chau Ching Chiong, Eric Bryerton

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

7 Scopus citations

Abstract

A Q-band low phase noise voltage controlled oscillator (VCO) using balanced π-feedback with 2-μm GaAs heterojunction bipolar transistor (HBT) process is reported in this paper. The VCO features a phase noise of -105.5 dBc/Hz at 1-MHz offset, and a tuning frequency of from 41.2 to 42.1 GHz with a maximum output power of -9 dBm. The differential outputs are also provided from the VCO due to the use of balanced π-feedback. The overall dc power consumption of the VCO is only 20 mW with a supply voltage of 2.5 V. The chip size of the VCO is 1 × 1 mm2. To the best of the authors' knowledge, this work demonstrates the lowest FOM among au the reported VCOs except the InP-based HBT VCOs around 40 GHz.

Original languageEnglish
Title of host publicationProceedings of the 2007 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2007
Pages119-122
Number of pages4
DOIs
StatePublished - 2007
Event2007 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2007 - Honolulu, HI, United States
Duration: 3 Jun 20075 Jun 2007

Publication series

NameDigest of Papers - IEEE Radio Frequency Integrated Circuits Symposium
ISSN (Print)1529-2517

Conference

Conference2007 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2007
Country/TerritoryUnited States
CityHonolulu, HI
Period3/06/075/06/07

Keywords

  • π-feedback and VCO
  • GaAs
  • HBT
  • Low phase noise

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