A CMOS Dual-Band Voltage Controlled Oscillator

descriptionPublicationkeyboard_double_arrow_right Article , Conference object 01 Dec 2006Publisher:IEEEJournal:APCCAS 2006 - 2006 IEEE Asia Pacific Conference on Circuits and Systems

Authors: S.-L. Jang; Y.-H. Chuang; C.-C. Chen; S.-H. Lee; J.-F. Lee;

doi: 10.1109/apccas.2006.342521

A CMOS Dual-Band Voltage Controlled Oscillator

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Abstract

A new fully integrated, dual-band voltage controlled oscillator (VCO) is presented. The VCO is implemented in 0.18?m CMOS technology with 1.8V supply voltage. The circuit allows the VCO to operate at two resonant frequencies with two LC tanks. This VCO is configured with 2.4 GHz and 4.8 GHz frequency bands with differential outputs. The dual-band VCO operates at 2.15GHz ~ 2.75GHz and 4.75GHz ~ 4.99GHz. The measured phase-noise performances of a dual band VCO are 121.45 and 118.49 dBc/Hz at 1 MHz offset at the frequencies of 2.4 and 4.8 GHz, respectively, while drawing 3.88 mA and 3.1 mA from a 1.8V supply.

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National Taiwan University of Science and Technology
Taiwan

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