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Préamplification et modulation de signaux (IPC et SATE)

822-1 Préamplification et modulation de signaux (IPC et SATE) Génie physique et systèmes embarqués (formation initiale sous statut étudiant) S7
Cours : 9 h TD : 19 h TP : 12 h Projet : 0 h Total : 40 h
Responsable : Chantal Gunther
Pré-requis
Non renseigné
Objectifs de l'enseignement
- Understand the limitations of signal processing in amplifier design, including time constraints, frequency considerations, and both static and dynamic imperfections.
- Analyze power dissipation and evaluate the power efficiency of electronic circuits.
- Design relaxation oscillators and active filters.
- Explore the architecture of telecommunications systems, modulation techniques, and their impact on power spectra, bit error rates, and spectral efficiency.
Programme détaillé
- Operational Amplifiers
Analyze the effects of real-world imperfections (offset voltage, slew rate, frequency limitations) on amplifier circuit performance, including input/output impedance (Ze, Zs), gain, and linearity.
- Instrumentation Amplifiers
Study various architectures and their applications in precision signal measurement.
- Power Amplifiers
Understand internal structure, key characteristics, thermal dissipation issues, and heatsink design principles.
- Oscillators
Explore the structure, operating principles, and practical uses of relaxation oscillators and voltage-controlled oscillators (VCOs).
- Filters
Examine filter theory and apply it to the design of active filters.
- Modulation and Telecommunications
Understand the fundamentals of communication channels, power spectral density of analog and digital signals, carrier modulation and demodulation, bit error rates, spectral efficiency of modulation schemes, and applications of phase-locked loops (PLLs).
Applications (TD ou TP)
- Differential Amplifiers: Analyze differential-mode and common-mode gain, bias currents, offset voltage, and the influence of frequency on performance.
- Single-Supply Op-Amp Circuits: Study design considerations and practical implementations using a single power supply.
- Operational Amplifier Performance: Examine gain and bandwidth characteristics, including the Miller effect and its implications.
- Instrumentation Amplifiers: Understand and compare basic two- and three-op-amp configurations; apply concepts to sensor bridge implementation.
- Power Amplifiers: Perform power dissipation and efficiency calculations; study output current limiting techniques and analyze the power efficiency of Class-B amplifiers.
- Oscillators: Analyze the behavior and design of relaxation voltage-controlled oscillators (VCOs).
- Active Filters: Design and analyze universal active filters; compare the frequency response characteristics of Butterworth, Chebyshev, and Bessel filters.
Compétences acquises
Ability to account of defects in electronic circuits and assess their impact on the actual performance of the overall system.
Competence in selecting appropriate components by evaluating their characteristics (input/output parameters, bandwidth, noise, impedance) against the requirements of a specific application.

Practical work
Develop the ability to test and evaluate the performance of electrical circuits through electrical characterization and simulation of electronic schematics.
Define the specifications of a phase-locked loop (PLL) and implement it for a specific application.
Gain practical skills in implementing synchronous detection techniques.
Predict and measure the power spectra of baseband and modulated signals.
Bibliographie
-'Électronique des circuits intégrés' Tran Tien Lang, Masson
-Operational Amplifier Circuits : Theory and Applications. E.J. Kennedy,. Holt, Rinehart and Winston, Inc.
-A.P. Malvino, Principes d'électronique, Dunod
-Amplificateurs de puissance, M. Girard, McGraw Hill, 1988, ISBN : 2-7042-1180-9
-Filtres actifs, Paul Bildstein, Editions Radio, 1976.
-Active Filter Design Techniques, sloa088, Texas Instruments

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