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Etude du bruit électrique dans les dispositifs fonctionnant en régime non linéaire. Application à la conception d'amplificateurs micro-ondes faible bruit

Cédric Chambon 1
1 LAAS-MOST - Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : This work deals with the study on high frequency noise when components and active circuits are working under large signal conditions. It could be the case for broadband receivers fitted with low noise amplifiers, which are desensitized by blocking signals. Mixers and oscillators are also under consideration. Firstly, a behavioural modelling is described and allows us to point out the interaction of white noise with a sinusoidal signal. The theoretical model is compared to several conditions of operation, and we obtained satisfying agreements. Many amplifiers are tested and compared; at least, the behavioural modelling is used to study their additive noise. The second part is dedicated to measurement techniques we have developed for this work. We are capable to measure noise figure and noise parameters of microwave active devices functioning with strong power signals. We also propose an original method which provides the four noise parameters of discrete components or amplifiers working under large signal condition. The results we have found are indirectly compared to residual phase noise measurements. After all, the last part affects the design of low noise amplifiers working under nonlinear condition. Various silicon bipolar transistors have been characterized, and a figure of merit have been set in order to find the best component taking into account noise figure and linearity. Finally, simulations and experimental results demonstrate the interest of designing circuits working under strong nonlinear regime.
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https://tel.archives-ouvertes.fr/tel-00206284
Contributor : Arlette Evrard <>
Submitted on : Thursday, January 17, 2008 - 8:37:26 AM
Last modification on : Friday, January 10, 2020 - 9:10:08 PM
Long-term archiving on: : Tuesday, April 13, 2010 - 9:11:55 PM

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  • HAL Id : tel-00206284, version 1

Citation

Cédric Chambon. Etude du bruit électrique dans les dispositifs fonctionnant en régime non linéaire. Application à la conception d'amplificateurs micro-ondes faible bruit. Micro et nanotechnologies/Microélectronique. Université Paul Sabatier - Toulouse III, 2007. Français. ⟨tel-00206284⟩

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