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Wideband CMOS LC VCOs
Axel Berny, Ph.D. 2005

Modern broadband communication systems require highly stable frequency references adjustable over a wide range of frequencies. One such system is a cable tuner, which requires a voltage-controlled oscillator (VCO) capable of tuning between 1.2 and 2.1 GHz and having phase noise below -85 dBc/Hz at a 10 kHz offset from the carrier. Solutions addressing such specifications have traditionally relied on expensive high-end technologies and external components. However, today's CMOS technologies are cost-effective and provide sufficient bandwidth for many RF communication applications. The goal of this research project is to establish a framework for the analysis, design, and optimization of wideband CMOS LC VCOs.