Smart Bolometer: Toward Monolithic Bolometer with Smart Functions

The content of this chapter refers to uncooled resistive bolometers amd the challenge that consists in their integration into monolithic devices exhibiting smart functions. Uncooled resistive bolometers are the essential constitutive element of the majority of existing uncooled infrared imaging systems; they are referred to as microbolometer pixels in that type of application where matrixes of such elementary devices are used. uncooled bolometers represent more than 95% of the market of infrared imaging systems in 2010 (yole 2010) and infrared imaging systems are required for more and more applications

Estimation de la consommation au niveau architectural pour les circuits dédiés au traitement du signal

- La consommation des circuits intégrés, en particulier dans le domaine du traitement de signal embarqué, est devenue une contrainte de conception primordiale. Il est donc nécessaire de mettre en oeuvre des outils de conception haut-niveau spécifiques au problème de la basse consommation, aussi bien pour les applications portables que pour les applications hautes performances. Dans cet article nous présentons notre outil d'estimation de la consommation au niveau architectural, PowerCheck, intégré dans l'environnement BSS (Breizh Synthesis System, http://archi.enssat.fr/bss). PowerCheck est situé en aval de la synthèse architecturale et estime la consommation de l'application à partir des caractéristiques de l'architecture et de l'assignation temporelle de l'algorithme sur ladite architecture. L'intérêt principal de notre approche est la prise en compte des propriétés du signal, à savoir les corrélations spatiale et temporelle, et de l'architecture complète

Vacuum Casting to Manufacture a Plastic Biochip for Highly Parallel Cell Transfection

International audienceA novel polymer microarray fabrication technique is presented and applied to the realization of a biochip for highly parallelized cell transfection. The proposed microfabrication technique is derived from a macroscale rapid prototyping technique called vacuum casting. It was optimized to reduce production cost, in order to produce small series (100-10 000 chip series) of chips to meet demand in today's market of cellulomics. Microfabrication technologies and rapid prototyping technologies are combined to shape the master part, which can thus involve microsized features. The corresponding female structure is moulded in a flexible silicone material. The duplicated polymer chips are obtained by casting a thermosetting plastic under vacuum. The dimensional replication accuracy between the master part and the duplicated parts is uniform over the duplicated parts and better than 1%. Advantages of the proposed technique over existing plastic microfabrication techniques are discussed in the paper. Using this microfabrication technique, we produced a plastic biochip for highly parallelized transfection of arrays of living cells. The feasibility of parallel lipofection was demonstrated: two different plasmids encoding, respectively, eGFP and DsRED2 were inserted into HEK293T cells. The transfection was monitored through fluorescence observation after 72 h showing successful expression of both genes

Sampled voltammetry on an electrode array for the renewal of the electrode surface and the analytical solution during the analysis

International audiencePolarography with dropping mercury electrode has been widely used in electroanalysis. However, the method is less and less employed due to the toxicity of mercury. In this work, we have shown that it is possible to replace the dropping electrode by a working electrode array, allowing the renewal of the electrode surface and of the analytical solution during the analysis. This new concept has been demonstrated on copper analysis. Sampled current voltammetry has been carried out on an electrode array, giving rise to I vs. E curves with a limiting diffusion plateau. The principle can be extended to other electroanalytical methods as exemplified here with differential pulse voltammetry. Linear calibration curves have been obtained with both methods and a limit of detection of 2 × 10−5 mol L−1 has been reached for copper detection by differential pulse voltammetry

Heat Balanced Bolometer with Sigma-Delta Interface

International audienceThis paper presents a single-loop 2nd order sigmadelta interface circuit for a bolometer operating in closed-loop mode. Switched capacitor circuitry is developed to implement the sigma-delta structure. The sigma-delta modulator acts both as digital readout circuit and as a mean of heat feedback. The design approach of the sigma-delta structure and the feedback shaping is explained. The circuit is designed for a realization in AMS CMOS 0.35μm technology

Detection of magnetic nanoparticles

International audienc

Smart Infrared Detector

International audienc

Cell chip Micro-fabrication

International audienc

Conception d'un outil d'introduction à la prospective

International audienceCette communication présente un projet porté par deux prospectivistes et un élève ingénieur de 2 ème année. Nous devions réaliser un serious game pour la Société Française de Prospective dans l'optique de populariser la prospective et plus précisément le thème de la grande transition de l'humanité. L'objectif de notre jeu est de permettre à toutes les générations en âge de jouer de s'approprier le vocabulaire de ces thématiques. Il s'agit aussi de sensibiliser les joueurs à la pluralité des futurs possibles grâce aux multiples scénarios qu'ils créeront au cours de leurs parties. Nous avons également pour but de concevoir, à travers ce serious game, un outil de réflexion pour des prospectivistes aguerris. Notre démarche se décline en plusieurs phases. En premier lieu par la démarche pédagogique autour de l'élaboration du jeu, puis la méthodologie où nous associons les concepts à transmettre avec les règles du jeu. En second lieu, après plusieurs tests, notre jeu rentre dans une phase de professionnalisation afin de concevoir un modèle commercialisable et plus facile à utiliser pour les universités ou les entreprises