@inbook {7771,
	title = {Optimization-Based Design of RF-VCOs with Tapered Inductors},
	booktitle = {Performance Optimization Techniques in Analog, Mixed-Signal, and Radio-Frequency Circuit Design},
	year = {2015},
	note = {<p>DOI: 10.4018/978-1-4666-6627-6.ch006</p>
},
	month = {2015},
	pages = {134 - 157},
	publisher = {IGI Global},
	organization = {IGI Global},
	address = {Hershey, PA, USA},
	abstract = {<p>Voltage-Controlled Oscillators (VCOs) are widely used in wireless transceivers. Due to the stringent specifications regarding phase-noise, LC-VCOs are usually adopted. The need for maximizing phase-noise as well as minimizing the power consumption makes imperious the adoption of optimization-based design methodologies. For the optimization of the LC-VCO characteristics, special attention must be paid to the integrated inductor design, since its quality factor may have a strong influence in the LC-VCO phase-noise. Furthermore, designers must ensure that the higher limit of VCO operating frequency is sufficiently below the inductor resonant frequency. In this chapter, a study on the influence of the quality factor of the inductors on the LC-VCO overall behavior is presented. Then, optimization of integrated inductors by exploring the inductor geometric layout is presented. Finally, results obtained for the design of an LC-VCO in 130nm Technology using a previously optimized inductor are presented.</p>
},
	isbn = {9781466666276},
	url = {http://services.igi-global.com/resolvedoi/resolve.aspx?doi=10.4018/978-1-4666-6627-6.ch006},
	author = {Pedro Pereira and F{\'a}bio Passos and M. Helena Fino},
	editor = {Mourad Fakhfakh and Esteban Tlelo-Cuautle and Maria Helena Fino}
}
