Capacitor bank design for wide tuning range LC VCOs: 850MHz-7.1GHz (157%)

Bodhisatwa Sadhu, Ramesh Harjani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Scopus citations

Abstract

This paper describes novel design techniques for optimizing the switched-capacitor array in a wide tuning range LC VCO. The switches in the capacitor array are optimally sized to maximize the tuning range. Additionally, parasitic interconnect inductance inherent in the capacitor array is used for increasing the equivalent capacitance value. Based on these proposed techniques, an LC VCO that achieves 157% frequency tuning range from 850MHz to 7.1GHz with phase noise between -107.1 and -119.1 dBc/Hz at 1MHz offset and power dissipation between 3 and 15 mW is designed. The power and phase noise performance of this VCO is at par with the best wideband solutions. However, this is, by far, the largest tuning range obtained for CMOS LC VCOs till date.

Original languageEnglish (US)
Title of host publicationISCAS 2010 - 2010 IEEE International Symposium on Circuits and Systems
Subtitle of host publicationNano-Bio Circuit Fabrics and Systems
Pages1975-1978
Number of pages4
DOIs
StatePublished - Aug 31 2010
Event2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems, ISCAS 2010 - Paris, France
Duration: May 30 2010Jun 2 2010

Other

Other2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems, ISCAS 2010
CountryFrance
CityParis
Period5/30/106/2/10

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