Sousa, Fernando Rangel deBrito Filho, Francisco de Assis2014-12-172010-05-132014-12-172009-09-03BRITO FILHO, Francisco de Assis. VCO Banda Larga Integrado para Receptor a Cinco Portas. 2009. 75 f. Dissertação (Mestrado em Automação e Sistemas; Engenharia de Computação; Telecomunicações) - Universidade Federal do Rio Grande do Norte, Natal, 2009.https://repositorio.ufrn.br/jspui/handle/123456789/15300This work presents an wideband ring VCO for cognitive radio five-port based receivers. A three-stage differential topology using transmission gate was adopted in order to maintain wide and linear tuning range and a low phase-noise. Monte-Carlo analysis were performed for phase-shift response of individual stages, which is an important figure of merit in five-port works. It was observed a fairly linear correlation between control voltage and oscillation frequency in the range between 200 MHz and 1800 MHz. The VCO was preliminarily designed for IBM 130nm CMOS technologyapplication/pdfAcesso AbertoRádio cognitivoRádio definido por softwareCinco portasReceptores RFReceptores banda-largaOsciladores banda-largaVCO AnelCognitive radioSoftware defined radioFive-PortRF ReceiversWide-Band ReceiversWide-Band OscillatorsRing VCOmasterThesisCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA