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A very low phase noise fully integrated CMOS quadrature LC oscillator for 2.4 GHz bluetooth/WLAN applications

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4 Author(s)
Oussama Frioui ; L2MP - CNRS - Laboratoire Matériaux et Microélectronique de Provence, IMT - Technopole de château Gombert, 13451 Marseille Cedex 13, France ; Lakhdar Zaid ; Wenceslas Rahajandraibe ; Fayrouz Haddad

This paper presents a quadrature voltage-controlled oscillator (QVCO) based on the coupling of two LC-tank VCOs. The QVCO could be tuned between 2.41 and 2.64 GHz, and showed a phase noise of -139 dBc/Hz at 1 MHz offset frequency from the carrier across the whole tuning range, for a current consumption of 20 mA with 2.5-V power supply. A figure-of-merit of -190 dBc/Hz is observed.

Published in:

Communications and Information Technologies, 2007. ISCIT '07. International Symposium on

Date of Conference:

17-19 Oct. 2007