Low-phase-noise transformer-based top-series QVCO using GaInP/GaAs HBT technology.

Authors :: Meng, C. C.
Tseng, S. C.
Chang, Y. W.
Su, J. Y.
Huang, G. W.
Source :: Microwave & Optical Technology Letters. Jan2007, Vol. 49 Issue 1, p215-218. 4p. 2 Color Photographs, 2 Diagrams, 1 Graph.
Publication Year :: 2007
Abstract: The fully integrated GaInP/GaAs heterojunction bipolar transistor, transformer-based top-series quadrature voltage controlled oscillator (QVCO) is demonstrated at 4 GHz. The transformers on the semi-insulating GaAs substrate possess good electrical properties at high frequencies. The QVCO at 4.1 GHz has phase noise of -120 dBc/Hz at 1 MHz offset frequency, output power of 2 dBm and the figure of merit -178 dBc/Hz. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 215–218, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22067 [ABSTRACT FROM AUTHOR]

Subjects :: *HETEROJUNCTIONS
*BIPOLAR transistors
*HETEROSTRUCTURES
*TRANSISTORS
*BIPOLAR integrated circuits

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