Teses / dissertações sobre o tema "Oscillateur à verrouillage par injection"
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Mao, Yuqing. "Nouvelle génération de générateurs de fréquence par auto-calibration de la grille arrière des transistors en technologie FDSOI". Electronic Thesis or Diss., Université Côte d'Azur, 2023. http://www.theses.fr/2023COAZ4123.
Texto completo da fonteModern data communication systems heavily rely on synchronous transmission techniques to optimize bandwidth and minimize power consumption. In such systems, only the data signal is transmitted, necessitating the implementation of Clock and Data Recovery (CDR) circuits at the receiver end. This thesis explores the novel application of Fully-Depleted Silicon-On-Insulator (FDSOI) 28nm technology to enhance the performance of CDR circuits by mitigating short-channel effects through innovative transistor structures.One contribution of this thesis is the development of a negative resistance circuit using the back gate of the FDSOI transistor. This circuit employs a current mirror controlled by the back gate to create a negative resistance LC oscillator. In parallel, this work presents the implementation of two types of oscillators: a complementary ring oscillator and a fast ring oscillator. The complementary ring oscillator capitalizes on complementary inverters, offering automatic bias feedback by the back gate control, thereby enhancing its performance. Meanwhile, the fast ring oscillator uses fast inverters in combination with complementary inverters designed to minimize propagation delays. The thesis presents a detailed comparative analysis of these oscillators, highlighting their individual strengths and limitations. Furthermore, we introduce an injection signal into the ring oscillator, resulting in the creation of a low-jitter Injection-Locked Oscillator (ILO). This ILO exhibits remarkable performance characteristics, particularly in reducing phase noise and enhancing frequency stability. Taking advantage of the good performance of the ILO, we propose a novel low-cost and low-power Injection-Locked Clock and Data Recovery (ILCDR) with a fast-locking time and good jitter for burst-mode applications.To validate the proposed designs and their performance at different operational frequencies, extensive simulations have been carried out using Cadence Virtuoso at 868 MHz and 2.4 GHz. In addition, the layout design and post layout simulation of the ILCDR based on the complementary ring oscillator are also studied
Coronel-Rico, Juan Fernando. "Étude et réalisation d'un oscillateur à base de VCSEL verrouillé en phase pour des applications en télécommunications". Thesis, Toulouse, ISAE, 2016. http://www.theses.fr/2016ESAE0013/document.
Texto completo da fonteOscillators are present in all telecommunication systems. They synchronize the emitter and receiver of a message. The quality of the synchronization depends on the oscillator stability. To characterize the frequency domain oscillator stability, the phase noise of the carrier is used as figure of merit. An oscillator delivering a low phase noise carrier is a high spectral purity oscillator. Electronic oscillators are high performing at low frequencies. As communications systems require high data rate transmission, the electronic oscillators uses frequency multipliers that degrades the spectral purity of the carrier. The hybrid systems take advantage of the good performance of optical components at high frequency with the goal to be integrated in the electronic systems to overcome frequency limitation issues. This work use the optical injection locking technique by injecting the laser beam of a master laser inside the cavity of a VCSEL under direct modulation. The optical injection locking technique enlarges the direct modulation bandwidth of the VCSEL and reduces the Relative Intensity noise of the laser (RIN). The RIN reduction has as side effect the reduction of the additive noise inside the oscillator and, in consequence, reducing the oscillator phase noise
Cabrera, Salas Dwight José. "Low phase noise Mm-wave frequency generation for backhauling applications on BiCMOS technology". Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0432/document.
Texto completo da fonteThis thesis deals with the analysis and design of Low phase Noise Local-Oscillator(LO) sources suitable for backhauling applications on the frequencies 30-38GHz. The LO is intended to be used in a low-IF architecture for low order modulations (2-3 bits/symbol). This work was developed in collaboration with NXP Semiconductorsat CAEN, France, within the project RF2THz of the European program CATRENE.The original contributions in this work include a rigorous study of the 1/f2 phasenoise characteristics of the VCO (bipolar cross-coupled pair Voltage-Controlled-Oscillator) with the oscillating frequency. Key factors in the design of VCOs such as tuning range and the tank load given by the cross-coupled pair are considered in the analysis. The study reveals that as the frequency scales, the VCO passes through two different zones, named the QL-limited and the QC-limited region, that results from the dependence of the resonator quality factor on its inductive part (for low oscillating frequencies) and its capacitive part (for high oscillating frequencies). Moreover, the impact of the tuning range on the 1/f2 phase noise evolution was captured by using a classical circuit based on an AC-coupled varactor and a MiM capacitor. Simple and accurate equations were derived for the circuit parameters in order to achieve a desired central frequency with the required capacitance variation. For this circuit, it is demonstrated (and verified through circuit simulations) that the lowest quality factor scenario can be associated to the time-constant of a lossy capacitor. The latter allows to estimate easily the minimum quality factor of the capacitive part of the VCO LC tank, for a given tuning range, as a function of the oscillating frequency. In a similar way, and based on a small signal analysis, the time-constant of the output capacitance of the bipolar cross-coupled pair was derived. Interesting, this time constant shows a constant behavior over a wide frequency range, thereby allowing to estimate easily its quality factor. This study set the bases for an analytical framework that enables the evaluation of the 1/f2 phase noise performances of local oscillator sources working either on fundamental,super-harmonic or sub-harmonic mode. The superiority in terms of 1/f2 phase noise of local oscillators based on sub-harmonic oscillators is thus demonstrated and simple equations are derived to determine the maximum performance and the conditions on which this can be achieved. Finally, a signal generation system intended for a low-IF point-to-point fixed radio system in the Ka-Band band is thus designed and verified through prototype measurements.The system is composed by a sub-harmonic VCO followed by an injectionlocked frequency tripler (ILFT) and it is designed in a 0.25m BiCMOS SiGe:C technology. The ILFT implements a cascode current-biased common emitter configuration that exploits the second harmonic of the VCO to enhance the efficiency in the generation of the injecting signal responsible for the ILFT locking. At 30.8GHz, the system achieves a phase noise of -112dBc/Hz at 1MHz offset. The total current consumption is 38mA for a supply voltage of 2.5V. A second prototype is designed for a multiband LO generation, providing thus three RF outputs at 18GHz, 34GHz and 68GHz. With a measured tuning range of 10% for each RF output, the measured phase noise at 1MHz is -113dBc/Hz, -107dBc/Hz and -100dBc/Hz respectively
Akmansoy, Eric. "Verrouillage par injection des lasers impulsionnels TEA CO₂ : résonateurs stables et instables". Paris 11, 1988. http://www.theses.fr/1988PA112235.
Texto completo da fonteThis thesis is divided into three parts. The first part gives the theorical elements of the study respectively related to i) The kinetics C0₂ amplifier medium. Ii) The description of resonator modes. Iii) The CW injection of pulsed lasers. In the second part are reported the realization of a 1-10 J TEA C0₂ laser, its optical and electrical characterization, the injection-locking results for varions configurations and their comparison with theory. As the major point, the performance of stable- and unstable resonator TEA C0₂ lasers are compared in the case of CW single-mode injection. The heterodyne detection of the pulses allows to measure the main characteristics of single-mode injection-locking : the locking band-width and the minimum injection intensity. Other injection schemes are considered. I) The CW single mode injection in a ring resonator. Ii) The two transverse mode injection in a laser with an unstable resonator. The third part of the thesis is a detailed study of intra-pulse frequency variations and the refractive index effects in the amplifier medium. In the course of this work, new performances have been obtained of great interest for LIDAR applications. Lt is the first time that 5 μS 1 J single longitudinal mode pulses are obtained at 10 μm with unstable resonator lasers for injected powers as low as 200nW. Lt is also demonstrated that the frequency chirping can be considerably reduced. Finally it is the first time that two longitudinal mode operation of a high energy laser is controlled with the injection of a weak signal into the laser cavity
Akmansoy, Eric. "Verrouillage par injection des lasers impulsionnels CO TEA résonateur stable et instable /". Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37611137f.
Texto completo da fonteCassard, Philippe. "Verrouillage par injection des lasers impulsionnels de grande puissance : le laser TEA CO₂". Paris 11, 1985. http://www.theses.fr/1985PA112338.
Texto completo da fonteThis thesis is directed at the study of injection-locking of high power pulsed lasers. Chapter I give a theoretical analysis of injection mode-locking in such lasers. A multimode theory is developed on the basis of the semi-classical treatment in the weak field regime. A detailed investigation of CW injection-locking is reported. It is clearly demonstrated that locking by injection of a weak field in a pulsed multimode laser stems from injection mode-locking whatever is the injection field time history. Thus the generation of short pulses by injection is described as well. Chapter II theoretically overviews the energetic features of the TEA CO₂ laser, with or without injection. Chapter III presents an experimental investigation of CW injection-locking in stable resonator TEA CO₂ lasers. Frequency measurements are performed with a new high frequency heterodyning scheme. The limits of CW injection locking are studied. Moreover, the influence of the transient discharge electron density on injection-locking is demonstrated. Chapter IV gives an experimental evidence of high order transverse mode injection-locking in unstable resonator TEA CO₂ lasers
DOARE, PHILIPPE. "Application du verrouillage par injection optique de deux lasers semiconducteurs a une transmission optique coherente". Besançon, 1991. http://www.theses.fr/1991BESA2022.
Texto completo da fonteMelkonian, Jean-Michel. "Mise en forme spectrale et temporelle de sources optiques infrarouges par mélange non-linéaire à trois ondes". Phd thesis, Palaiseau, Ecole polytechnique, 2007. http://tel.archives-ouvertes.fr/tel-00318682.
Texto completo da fonteChane, Kuang Sang Laurent. "Stratégie de contrôle hybride d'un magnétron verrouillé par injection pour un Transport d'Energie Sans Fil par onde hyperfréquence". Phd thesis, Université de la Réunion, 2002. http://tel.archives-ouvertes.fr/tel-00464105.
Texto completo da fonteAmeziane, El Hassani Chama. "Contribution à la réalisation d’un oscillateur push-push 80GHz synchronisé par un signal subharmonique pour des applications radars anticollisions". Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14025/document.
Texto completo da fonteThis thesis is a part of a French project "VELO". The project is collaboration between STMicroelectronics and several laboratories including IMS-Bordeaux and LAAS laboratories. The aim of this project is to achieve a prototype of millimeter anti-collision radar. In this work a frequency synthesizer is implemented. This circuit will be incorporated in the reception chain of the demonstrator. A bibliographical study of classical architecture was completed. Examples of architectures encountered in the millimeter frequency range have been studied. The purpose of this thesis is to study the phenomena of synchronization in oscillators. The objective is to design an injection locked oscillator ILO driven by another oscillator, the second oscillator operates at lower frequency and offers better stability and noise characteristics.In this thesis, the injection locking mechanism of the oscillators has been described. A model of synchronization by series injection is proposed. The model is based on the theory of Huntoon and Weiss and inspired by Badets’ work performed on parallel injection. The theory expresses the synchronized frequency range depending on the used topology and the values of the components. The validity of the theory was evaluated by simulation. The results show good agreement between simulation and theory and validate the principle of synchronization by injection.The feasibility of a millimeter ILO synchronized by the harmonic of a reference signal operating at lower frequency has been demonstrated experimentally. The synthesizer was implemented in BiCMOS technology for 130nm applications millimeter of STMicroelectronics. The oscillator operates at 82.5 GHz and performs a frequency range of 2GHz. The noise performance of the synthesizer is satisfactory. The phase noise of the ILO depends on the reference phase noise, and reaches values of -110dBc/Hz at 1MHz from the carrier frequency
Prache, Pierre. "Modélisation, conception et intégration de nouvelles architectures différentielles pour des capteurs M/NEMS résonants". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLC054/document.
Texto completo da fonteM/NEMS resonant sensors, due to their small size, consumption and quasi-digital output (a frequency most of the time) are unavoidable tools for on-board systems, from smartphones to aeronautic technology. However, they suffer from environmental drifts, and even though the effect of these drifts can be limited by the design, it is sometimes necessary to use differential architectures to properly remove the drifts from the measurements and ensure the output reliability even in harsh environments. In this work, a special technique for differential measurement is studied, consisting in the synchronization of two resonators, one reference and one sensor. Placed in a single feedback loop, they oscillate at the same frequency and eventual phase shift when the physical quantity to be sensed is applied. This phase shift is a theoretically drift-free way to measure this physical quantity. This technique also benefits from its ease of integration, making it a good candidate for large scale integration. After studying the theoretical framework, several design guidelines are found, which are used in the fabrication of a proof of concept. The theoretical performances are found as well, and compared to the experimental ones
Patera, Giuseppe. "Propriété quantiques des impulsions ultra courtes générées par oscillateurs paramétriques optiques pompés en mode synchrone: compression des fluctuations et intrication multi-modes". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2008. http://tel.archives-ouvertes.fr/tel-00404162.
Texto completo da fonteFinateu, Thomas. "A direct digital retransmitter based on phase-interpolar direct digital synthesizer and injection locking". Thesis, Bordeaux 1, 2008. http://www.theses.fr/2008BOR13671/document.
Texto completo da fonteThis Ph.D dissertation presents a radio-frequency transmitter, made of a direct digital frequency synthesizer, built around a sigma delta and a phase interpolator, and an injection locked oscillator. The direct digital synthesizer generates frequencies between 400 and 500 MHz with a frequency resolution better than 60 Hz. On the other hand, the injection locked oscillator up-converts synthesizer output up to the Bluetooth band by multiplying frequencies by 5. Moreover, the locked oscillator filters injected signal phase noise up to recover the one of the free running oscillator. The locked oscillator bandwidth can be tuned digitally. This transmitter has been developed on 65-nm CMOS technology
Doumbia, Yaya. "Optical injection dynamics and polarization properties of semiconductor lasers frequency combs". Electronic Thesis or Diss., CentraleSupélec, 2021. http://www.theses.fr/2021CSUP0008.
Texto completo da fonteIn this work, we study the nonlinear dynamics of laser diodes optically injected with frequency combs.We first theoretically and experimentally analyze the nonlinear dynamics of edge-emitting lasers (EELs) from an optical injection of frequency combs. The injection parameters and injected comb properties are varied to unveil several locked and unlocked dynamics. For large enough injection strength and over a large detuning range, the injection locking bifurcates to a time-periodic dynamics corresponding to an optical frequency comb that extends the injected comb to a much broader optical spectrum. A bifurcation analysis reveals a cascade harmonic frequency comb dynamics leading to a significant increase in the output comb lines. We have also used the injection parameters, comb properties, and injection current to control the new comb properties. We secondly analyze the nonlinear dynamics and polarization properties in vertical-cavity surface-emitting lasers (VCSELs) subject to orthogonal optical injection with frequency combs experimentally. Most importantly, the VCSEL shows two frequency combs with orthogonal polarization from a single device for some injection parameters. We also demonstrate the possibility to control the single or two polarizations comb repetition rate through harmonic frequency combs generation. We finally present experimentally and theoretically the VCSEL injection dynamics from parallel optical frequency comb injection. We show that the two polarizations combperformance is restricted to high current injection in the case of parallel optical injection. For fixed bias current, the two polarization comb dynamics disappear when increasing the injected comb spacing.This thesis therefore demonstrates besides its interest for nonlinear laser dynamics, optical injection is a technique to harness the comb properties in laser diodes
Raybaut, Pierre. "Lasers femtoseconde Yb3+ : BOYS et Yb3+ : SYS". Phd thesis, Université Paris Sud - Paris XI, 2003. http://tel.archives-ouvertes.fr/tel-00004436.
Texto completo da fonteKéfélian, Fabien. "Corrélation du bruit de phase de lasers à réseau de Bragg par injection optique : Application à la génération et au transport sur fibre de signaux radiofréquence". Phd thesis, Télécom ParisTech, 2005. http://tel.archives-ouvertes.fr/tel-00011613.
Texto completo da fonteMelkonian, Jean-Michel. "Façonnage des propriétés spectrales et temporelles de sources optiques infrarouges par mélange non-linéaire à trois ondes". Phd thesis, 2007. http://pastel.archives-ouvertes.fr/pastel-00003497/en/.
Texto completo da fonteDianoux, Raphaelle. "Injection et détection de charges dans des nanostructures semiconductrices par Microscopie à Force Atomique". Phd thesis, 2004. http://tel.archives-ouvertes.fr/tel-00008831.
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