A low-phase-noise wide-band CMOS quadrature VCO for multi-standard RF front-ends

Ali Fard, Pietro Andreani

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

A low phase noise CMOS LC quadrature VCO (QVCO) with a wide frequency range of 3.6-5.6 GHz, designed in a standard 0.18 μm process for multi-standard front-ends, is presented. A significant advantage of the topology is the larger oscillation amplitude when compared to other conventional QVCO structures. The QVCO is compared to a double cross-coupled LC-tank differential oscillator, both in theory and experiments, for evaluation of its phase noise, providing a good insight into its performance. The measured data displays up to 2 dBc/Hz lower phase noise in the 1/f2 region for the QVCO, when consuming twice the current of the differential VCO, based on an identical LC-tank. Experimental results on the QVCO show a phase noise level of -127.5 dBc/Hz at 3 MHz offset from a 5.6 GHz carrier while dissipating 8 mA of current, resulting in a figure of merit of 181.3 dBc/Hz.
Original languageEnglish
Title of host publication5th IEEE Radio Frequency Integrated Circuits (RFIC) Symposium
PublisherIEEE
Publication date2005
Pages539-542
ISBN (Print)0-7803-8983-2
DOIs
Publication statusPublished - 2005
Event2005 IEEE 5th Radio Frequency Integrated Circuits Symposium - Long Beach, United States
Duration: 12 Jun 200514 Jun 2005
Conference number: 5
https://ieeexplore.ieee.org/xpl/conhome/9955/proceeding

Conference

Conference2005 IEEE 5th Radio Frequency Integrated Circuits Symposium
Number5
Country/TerritoryUnited States
CityLong Beach
Period12/06/200514/06/2005
Internet address

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