Power waves formulation of oscillation conditions: avoidance of bifurcation modes in cross-coupled VCO architectures

This paper discusses necessity of power-waves formulation to extend voltage-current oriented approaches based on linear concepts such as admittance/impedance operators and transfer-function representations. Importance of multi-physics methodologies, throughout power-waves formulation, for the analysis and design of crystal oscillators is discussed. Interpretation of bifurcation modes in differential cross-coupled VCO architectures in terms of gyrator-like behavior, is proposed. Impact of amplitude level control (ALC) on large-signal phase noise performances is underlined showing necessity of robust control analysis approach relative to power-energy considerations

Characterisation and macro-modeling of patterned micronic and nano-scale dummy metal-fills in integrated circuits

In this paper, a wideband characterization and macro-modeling of patterned micronic and nano-scale dummy metal-fills is presented. Impacts of patterned dummy metal-fill topologies including square, cross, vertical and horizontal shaped arrays on electrical performances (isolation/coupling, attenuation, guiding properties, etc…) are investigated. The validity of the proposed macro-modeling methodology is demonstrated by comparison with high frequency measurements of dedicated carrier structures including on-chip interconnects and RF inductive loops. An original extraction approach, based on local ground concept, is proposed to capture high frequency behaviour of dummy metal-fill in physics-based compact broadband SPICE model. The RLC parameters are accurately derived using fully scalable closed-form semi-analytical expressions

Broadband equivalent circuit derivation for multi-port circuits based on eigen-state formulation

In this paper a passive guaranteed wide-band equivalent circuit derivation methodology, attempting to bridge physical geometry considerations with equivalent circuits model extractions, is proposed. Electromagnetic (EM) eigen-states formulation is introduced to bridge between physical topology (geometry) and equivalent network architectures. Instead of casting global Z or Y parameters in pole-residue expansions following or T-networks, the proposed methodology considers eigen-states input impedances/admittances as primary goal functions to derive in canonical equivalent circuit models. While classical or T representations are based on global ground assumptions, the proposed methodology refers to local ground references. The validity of the broadband extraction methodology is demonstrated through correlations with RF measurement carried out on CPW transmission lines and coupled RF inductors up to very high frequencies

Concept of marco-pixel formulation using non-uniform fourier transform

A multi-grid formulation of Green’s functions in the spatial domain based on the idea of partitioning overall electromagnetic simulation domain into macro-pixels is proposed. The concept of macro-pixel is introduced, based on physical considerations, as extension of the notion of pixel with possible spatial variations within its sub-domain, to capture both lower and higher order variations. Interactions between macro-pixels are derived to evaluate higher order and lower order modal couplings as function of normalized separation distances. The interactions between macro-pixels are efficiently computed using an original NUFFT (Non-Uniform Fast Fourier Transform) which renders possible systematic use of multi-grid space stepping. Attributes of observed coupling ranges and potential control of truncation orders at macro-pixel levels are very attractive for hybridization with time domain formulations

Contribution à la modélisation électromagnétique des circuits intégrés multicouches (réalisation d'un logiciel de simulation et d'aide à la conception des stratégies d'isolation)

TOULOUSE-ENSEEIHT (315552331) / SudocSudocFranceF

Combined Hybrid mm-Waves and Optics Sensing with Smart Data Fusion for Autonomous Vehicles

International audienceCombination of agile mm-Wave MIMO Phased Array technologies with Optical Sensing solutions is proposed toward new functionalities for environmental perceptions and ubiquitous interactions. The resulting paradigms will operate the unification of mm-Wave and optical sensing solutions for enabling emerging technologies relative to interactions of humans with smart devices and systems in randomly changing environments. Perspectives for Autonomous Vehicles with Advanced Driver Assistance Systems (ADAS) including Gesture-Recognition (GR) through ubiquitous interactions based on hybrid agile mm-Wave RFIC technologies and optical systems are drawn. Several hardware realizations of mm-Wave phased-array systems and MIMO links operating in the mm-Wave range are built and co-assembled with optical systems for smart data fusion and real-time treatment for improvement decision making process

Contribution à la modélisation de l'Intégrité des alimentations dans les system-in-Package

Ce travail de recherche intitulé " Contribution à la modélisation de l'Intégrité des Alimentations dans les System-in-Package", effectué chez NXP semi-conducteurs, se propose d'étudier l'intégrité des alimentations et des signaux dans un système complexe tel que le System-in-Package(SiP), les System-on-Chip(SoC) ou autres (PoP,...). C'est-à-dire la générations de perturbations électromagnétiques conduites dues à l'activité d'un système complexe sur son environnement d'intégration. Un bilan de puissance statique et dynamique permet de considérer l influence de l activité des fonctions numériques sur le système SiP. L activité dynamique est représentée sous forme de profils canoniques caractérisés par la technologie de conception des fonctions logiques. Cette représentation en base tient compte du cadencement multi fréquentiel (ou multi-harmonique) du système. Un logiciel a été développé permettant d'extraire un profil d'activité numérique définit suivant la géométrie de la fonction, sa technologie et ses fréquences d'activation. Les fonctions analogiques et le réseau passif d'interconnexions sont modélisés au travers de fonctions de transfert et validés par une approche expérimentale (domaine fréquentiel et temporel) et en simulation. Cette analyse a permis de souligner les potentialités de la modélisation BBS (Broad Band Spice Model). Ceci a permis une modélisation multi-port globale de l'environnement d'intégration modélisé depuis le PCB jusqu aux fonctions actives (PCB-Boitier-interconnexions-circuits). Les modèles extraits sont utilisables dans un environnement SPICE où l ensemble du système est modélisé dans un environnement unique. La CO-MODÉLISATION et la CO-SIMULATION GLOBALES permettent la proposition de règles de conception et l optimisation du découplage souligné par le potentiel du substrat de report PICS (Passive Integrating Component Substrate).This thesis, performed in NXP Semiconductors, presents an analysis on POWER INTEGRITY and SIGNAL INTEGRITY in complex systems (System-in-Package SiP, System-on-Chip SoC, PoP, etc). This subject takes in account the propagation and its effects of conducted electromagnetic interferences due to digital activities in power distribution network. A statement of static and dynamic power consumption allows to consider effects of digital activities through a multi-clock and multi harmonic model based on technologies, clocks and geometries of a dedicated functions, blocks or dices. A global distributed CO-SIMULATION/CO-MODELISATION methodology for concurrent/simultaneous analysis of passif distribution network have been successfully applied to a full complex system. An original "power signature" concept is used to model high speed digital modules temporal and spatial distribution of their power switching activity for analog-mixed-digital co-simulations. Analysis of coupling effects at systems level have been studied through access ports with and without active SiP modules. The measured coupling is validated with predicted simulation results based on electromagnetic simulations and broad band SPICE extractions. Correlations are validated between observed spurs in presence of SiP active modules and the behavioral response (transfer function) of the active die multiport, and multi-port de-embedding analysis. The full model of complex system, available in SPICE environnement, allows to analyse propagation and its effects of conducted electromagnetic interferences on dices, functions and system of the SiP. Thanks to this work, it will possible to supply new design rules and optimize of decoupling capacities values. A dedicated software was elaborated to generate a quick digital activity model easy-to-implement in SPICE environment.BORDEAUX1-Bib.electronique (335229901) / SudocSudocFranceF

Reconfigurable sensors for extraction of dielectric material and liquid properties

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DC-40 GHz SPDTs in 22 nm FD-SOI and Back-Gate Impact Study

In this paper, ultra-wideband SPDTs fabricated in the 22 nm FD-SOI process from GLOBALFOUNDRIES are presented. Three SPDT modules were implemented, each using a different type of millimeter-wave NFET, namely a conventional-well regular-V t (RVT) device, a flipped-well super-low-V t (SLVT) device and a specially treated device without back-gate well contact for decreased substrate parasitics (BFMOAT device). It is shown that using the back-gate achieves lower losses, higher isolation and better linearity for the RVT and SLVT based switches, while the reduced parasitic BFMOAT switch shows better performance at the high-end of the mm-wave spectrum

Broadband characterization of dielectric materials from RF, millimeter-wave to THz frequencies accounting for anisotropy

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