5.4 GHz - 127 dBc Hz at 1 MHz GaInP/GaAs HBT quadrature VCO using stacked transformers

Chin-Chun Meng*, C. H. Chen, Y. W. Chang, G. W. Huang

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

The first fully integrated GaInP/GaAs heterojunction bipolar transistor (HBT) quadrature voltage controlled oscillator (VCO) using the stacked-transformer LC tank is demonstrated at 5.43-5.31 GHz with low-phase-noise performance. The stacked-transformers are formed by two interconnect metal layers and possess good electrical properties at high frequencies because of the semi-insulating GaAs substrate. The quadrature VCO at 5.38 GHz has phase noise of -127.4 dBc/Hz at 1 MHz offset frequency, output power of -4 dBm and a figure of merit (FOM) -191 dBc/Hz.

Original languageEnglish
Pages (from-to)906-908
Number of pages3
JournalElectronics Letters
Volume41
Issue number16
DOIs
StatePublished - 4 Aug 2005

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