Orientador: Luiz Carlos Kretly / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação / Made available in DSpace on 2018-08-11T03:07:44Z (GMT). No. of bitstreams: 1 Capovilla_CarlosEduardo_D.pdf: 7813094 bytes, checksum: 52ab9727d246649f4c3628a9a462e9c2 (MD5) Previous issue date: 2008 / Resumo: Esta pesquisa tem por objetivo a concepção de novas topologias de circuitos integrados e suas caracterizações para operação em sistemas de rádio-recepção. O projeto e a fabricação de chaves de RF, LNAs, mixer e VCOs são apresentados. A técnica SMILE (Spatial MultIplexing ofLocal Elements) foi adotada devido às suas vantagens e funcionalidade para a otimização física de antenas inteligentes. Essa técnica requer um chaveamento sequencial das antenas do arranjo e para tal foi desenvolvido um controle de chaveamento acionado por um VCO digital. A demultiplexação analógica do sinal é implementada através de um OTA e chaves analógicas diferenciais. Assim, além da introdução de novas topologias de circuitos integrados, este trabalho estabelece procedimentos de projeto e simulação associados à validação dos dispositivos fabricados. Palavras-chave: circuitos integrados, rádio-recepção, antenas inteligentes, SMILE / Abstract: This research aims the conception of new topologies of integrated circuits and its characterizations for operation in radio-receiver systems. The design and fabrication of RF switches, LNAs, mixer, and VCOs are presented. The SMILE - Spatial MultIplexing of Local Elements - technique was adopted due to its advantages and functionality for the intelligent antennas physical optimization. This technique requires a sequential switching of the antennas and for this purpose a switch driver with a digital VCO was developed. The analog demultiplexation of the signal is implemented with OTA and differential analog switches. Thus, besides the introduction of new integrated circuit topologies, this work establishes procedures of design and simulation together with the manufactured devices validation. Keywords: integrated circuits, radio-reception, smart antennas, SMILE / Doutorado / Eletrônica, Microeletrônica e Optoeletrônica / Doutor em Engenharia Elétrica

Les réseaux de capteurs sans fil nécessitent des fonctions de calcul et de transmissionradio associées à chaque capteur. Les SoCs RF intégrant ces fonctions doivent avoir uneautonomie la plus grande possible et donc une très faible consommation. Aujourd'hui, leursperformances énergétiques pourraient être fortement améliorées par des systèmes d'alimentationinnovants. En effet, les circuits d'alimentation remplissent leur fonction classique de conversiond'énergie mais aussi des fonctions d'isolation des blocs RF et digitaux. Leurs performancess'évaluent donc en termes d'efficacité énergétique et de réponse transitoire mais aussi d'isolationentre blocs et de réjection de bruit.Ce travail de thèse concerne l'intégration du système de gestion et de distribution del’énergie aux différents blocs RF d’un émetteur/récepteur en élaborant une méthodologie « topdown» pour déterminer la sensibilité de chaque bloc à son alimentation et en construisant unearchitecture innovante et dynamique de gestion/distribution de l'énergie sur le SoC. Cetteméthodologie repose sur la disponibilité de régulateurs de tension présentant des performancesadaptées. Un deuxième volet du travail de thèse a donc été de réaliser un régulateur linéaire detype LDO à forte réjection sur une bande passante relativement large et bien adapté àl'alimentation de blocs RF très sensibles aux bruits de l'alimentation. / Wireless sensor networks require calculation functions and radiofrequencytransmission modules within each sensor. RF SoCs integrating these functions must have thebiggest battery life and so a very small consumption. Today, innovative power managementsystems could highly enhance the energy performances of this type of RF SoC. Indeed, thesepower systems perform energy conversion and also the isolation functions of RF and digitalblocks. Their features are thus estimated in terms of energy efficiency, transient response and alsoisolation between blocks and noise rejection.This thesis work concerns the integration of the power management systems and itsdistribution channels into different ultra-low-power SoCs. This was achieved mainly thanks to thedevelopment of a new “top-down” approach. This new methodology consists of determining thesensibility of every block to its power supply and of designing an innovative and dynamicarchitecture of power management circuits on the SoC. This study ends up in the implementationof a very efficient low dropout (LDO) regulator for noise-sensitive low-current RF blocks inmixed SoC applications. The fabricated prototype achieves a high power supply rejection for awide range of frequencies.