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Soutenance de thèse Gabrielle GUITTON - 11 décembre 2017

Gabrielle GUITTON soutiendra sa thèse intitulée "Design Methodologies for Multi-mode and Multi-standard Low-Noise Amplifiers", lundi 11 décembre à 10h30 dans l'Amphi JP. DOM du Laboratoire IMS.

The recent enthusiasm for the Internet of Things as well as for communication satellites leads to the need for high-performance radio-frequency (RF) communication systems. In order tomeet the constraints of the mass market, these systems must be as compact and be as low power as possible. Beside, they are expected to address multiple communication standards and to adjust their performance to the environment, still in order to reduce the size and the power consumption. To address these purposes, the goal is to design multi-mode and multi-standard receivers. Currently, many works focus on the development of low-noise amplifiers (LNA), one of the most critical block of RF receivers. Hence, LNAs require design flows that can adapt to the different technologies and topologies in order to meet any given set of specifications. This thesis aims at the development of simple and accurate design methodologies for the implementation of low-noise amplifiers. The first methodology is dedicated to the implementation of a LNA in COTS technology for spatial applications. This LNA offers a broadband matching to address several standards. It is designed to be part of an RF receiver for nano-satellites. Thus, the latter is first studied in order to determine the specifications based on the standards of the targeted applications. The second methodology is dedicated to the implementation of LNAs in CMOS technology for any kind of applications. This methodology is first illustrated with basic topologies and then applied to an highly linear inductorless LNA. The design methodology also enables a fair comparison between topologies and between CMOS technologies, even the most advanced ones such as the 28 nm FDSOI. Finally, reconfigurability is added to the inductorless LNA, to address several standards while retaining the optimum sizing given by the previously introduced methodology. Indeed, the size and polarization of each transistor are digitally controlled in order to adjust the LNA’s performance to a given standard. Furthermore, the study of N-path filters combined with the proposed LNA is explored to improve the linearity of the circuit.

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