C-band fully integrated SiGe HBT superharmonic QVCO

This paper demonstrates a 4-GHz monolithic SiGe heterojunction bipolar transistor quadrature voltage-controlled oscillator (QVCO) using superharmonic coupling topology. The QVCO at 4.17 GHz has phase noise of −116 dBc/Hz at 1 MHz offset frequency, output power of −6 dBm, and the figure of merit −179 dBc/Hz. The core current consumption is 3.2 mA at 3 V supply voltage. The die size is about 1.4 mm × 1.2 mm. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 867–869, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI.10.1002/mop.22256

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