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Concept

Lithium-ion capacitor

Publications associées (27)

Adaptive Vibration Suppression System: An Iterative Control Law for a Piezoelectric Actuator Shunted by a Negative Capacitor

Tomas Sluka

An adaptive system for the suppression of vibration transmission using a single piezoelectric actuator shunted by a negative capacitance circuit is presented. It is known that by using a negative-capacitance shunt, the spring constant of a piezoelectric ac ...

Ieee-Inst Electrical Electronics Engineers Inc2012

Current-Mode Analog Adaptive Mechanism for Ultralow-Power Neural Networks

Rafal Tomasz Dlugosz

Neural networks (NNs) implemented at the transistor level are powerful adaptive systems. They can perform hundreds of operations in parallel but at the expense of a large number of building blocks. In the case of analog realization, an extremely low chip a ...

Institute of Electrical and Electronics Engineers2011

A theory of sound transmission through a clamped curved piezoelectric membrane connected to a negative capacitor

Hervé Lissek, Tomas Sluka

An analytical calculation of the acoustic transmission loss of sound propagating through a thin cylindrically curved piezoelectric membrane, which is rigidly clamped at its straight ends, is presented. The membrane is placed inside an acoustic tube and con ...

Elsevier2010

Comparison of Control Strategies for Maximizing Energy in a Supercapacitor Storage Subsystem

Alfred Rufer, Philippe Barrade

A storage supercapacitor subsystem is studied for insertion in a series hybrid electric vehicle (Fig. 1). This subsystem is composed of a supercapacitor bank and a braking resistor used when the supercapacitor voltage is at its maximum value. Generally, wh ...

2009

Reliability study of tunable ferroelectric capacitors

Nava Setter, Marija Kosec

In this paper, the reliability of tunable ferroelectric thin film capacitors has been addressed. The long term stability of tunable capacitors based on Ba0.3Sr0.7TiO3 films deposited by chemical solution deposition onto an alumina substrate was investigate ...

2008

Ageing of porous carbon electrodes

Manxi Zhu

Ultracapacitors, also called electrochemical double layer capacitors (EDLC) or supercapacitors, may improve the performance of conventional electrolytic capacitors in terms of specific energy, or improve the performance of rechargeable batteries in terms o ...

EPFL2006

High tuning range AlSi RF MEMS capacitors fabricated with sacrificial amorphous silicon surface micromachining

Mihai Adrian Ionescu, Philippe Renaud, Catherine Dehollain, Michel Declercq, Cyrille Hibert, Philippe Flückiger, Raphaël Fritschi

This paper reports the fabrication and electrical characterization of high tuning range AlSi RF MEMS capacitors. We present experimental results obtained by a surface micromachining process that uses dry etching of sacrificial amorphous silicon to release ...

2004