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Séance de cours

Équilibrage de charge dans les circuits de stimulation

Dans cours

EE-519: Bioelectronics and biomedical microelectronics

The course covers the fundaments of bioelectronics and integrated microelectronics for biomedical and implantable systems. Issues and trade-offs at the circuit and systems levels of invasive microelectronic systems as well as their eluding designs, methods ...

Description

Cette séance de cours traite de la comparaison des formes d'onde stimulantes pour l'efficacité et la sécurité, en abordant les conditions de déséquilibre de charge dans les implants et les solutions potentielles. Il couvre des méthodes telles que l'utilisation de condensateurs de blocage, l'équilibrage dynamique du courant et les techniques actives d'équilibrage de charge. La séance de cours explore également le contrôle de la dissipation thermique, les techniques de contournement de la stimulation et des exemples de mise en œuvre de circuits d'équilibrage de charge en bioélectronique et en microélectronique biomédicale.

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Enseignant·e

Alexandre Schmid

Alexandre Schmid received the M.Sc. degree in microengineering and the Ph.D. degree in electrical engineering from the Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland, in 1994 and 2000, respectively. Since 1994, he has been with the EPFL, working with the Integrated Systems Laboratory as a Research and Teaching Assistant, and with the Electronics Laboratories as a Postdoctoral Fellow. In 2002, he was a Senior Research Associate with the Microelectronic Systems Laboratory, where he has been conducting research in the fields of bioelectronic interfaces and implantable biomedical electronics, nonconventional signal processing and neuromorphic hardware, and reliability of nanoelectronic devices, and also teaches with the Microengineering and Electrical Engineering Departments of EPFL. Since 2011, he is a Maître d'Enseignement et de Recherche (MER) Faculty Member with EPFL. He is a coauthor of two books, Reliability of Nanoscale Circuits and Systems, Methodologies and Circuit Architectures, Springer, 2011, and Wireless Cortical Implantable Systems, Springer, 2013, and a coeditor of one book, as well as over 100 articles published in journals and conferences. Dr. Schmid has served as the General Chair of the Fourth International Conference on Nano-Networks in 2009 and has been serving as an Associate Editor of the Institute of Electrical, Information, and Communication Engineers Electronics Express since 2009.

Source officielle

Proximité ontologique

Physique

Électromagnétisme: Électrostatique

Chimie

Chimie physique: Électrochimie

Concepts associés (32)

Capacitor types

Capacitors are manufactured in many styles, forms, dimensions, and from a large variety of materials. They all contain at least two electrical conductors, called plates, separated by an insulating layer (dielectric). Capacitors are widely used as parts of electrical circuits in many common electrical devices. Capacitors, together with resistors and inductors, belong to the group of passive components in electronic equipment.

Neurostimulation

vignette|Implant cochléaire un appareil électronique qui stimule le nerf auditif grâce à des électrodes placées dans la cochlée de l'oreille interne, permettant à certaines personnes gravement sourdes de percevoir les sons. Pour les personnes souffrant de perte auditive sévère à profonde, les appareils auditifs implantables comme les implants cochléaires peuvent être une solution efficace La neurostimulation est la stimulation d'un nerf ou de plusieurs nerfs, de la moelle épinière ou d'une partie du cerveau (système nerveux central) à l'aide de neurostimulateurs.

Electrolytic capacitor

An electrolytic capacitor is a polarized capacitor whose anode or positive plate is made of a metal that forms an insulating oxide layer through anodization. This oxide layer acts as the dielectric of the capacitor. A solid, liquid, or gel electrolyte covers the surface of this oxide layer, serving as the cathode or negative plate of the capacitor. Because of their very thin dielectric oxide layer and enlarged anode surface, electrolytic capacitors have a much higher capacitance-voltage (CV) product per unit volume than ceramic capacitors or film capacitors, and so can have large capacitance values.

Film capacitor

Film capacitors, plastic film capacitors, film dielectric capacitors, or polymer film capacitors, generically called film caps as well as power film capacitors, are electrical capacitors with an insulating plastic film as the dielectric, sometimes combined with paper as carrier of the electrodes. The dielectric films, depending on the desired dielectric strength, are drawn in a special process to an extremely thin thickness, and are then provided with electrodes.

Standard electrode potential

In electrochemistry, standard electrode potential , or , is a measure of the reducing power of any element or compound. The IUPAC "Gold Book" defines it as: "the value of the standard emf (electromotive force) of a cell in which molecular hydrogen under standard pressure is oxidized to solvated protons at the left-hand electrode". The basis for an electrochemical cell, such as the galvanic cell, is always a redox reaction which can be broken down into two half-reactions: oxidation at anode (loss of electron) and reduction at cathode (gain of electron).

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Séances de cours associées (33)

Dispositifs de stockage d'énergie

Explore les méthodes d'étapes potentielles, les courbes de CV, les dispositifs de stockage d'énergie, le fractionnement de l'eau, les piles à combustible microbiennes, les batteries, les condensateurs et la conception des batteries Li-ion.

Électrochimie dynamique: Équation de Cottrell et Voltammétrie

Explore l'équation de Cottrell et les méthodes de voltammétrie en électrochimie.

Électrodes neurales

Explore la stimulation neuronale à l'aide d'électrodes, en abordant les défis de l'injection de charge et les limites de stimulation sûres.

Fondements de l'électrochimie

Couvre les principes fondamentaux de l'électrochimie, en se concentrant sur le potentiel cellulaire, la production de courant et la relation entre la conversion du courant et des réactifs.

Diélectriques et condensateurs

Explore la loi de Gauss avec des diélectriques, des condensateurs idéaux et un blindage des charges.

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Concepts associés (32)

Capacitor types

Neurostimulation

Electrolytic capacitor

Film capacitor

Standard electrode potential

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