Commissariat a L'energie Atomique

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Cyril Condemine

Marc Belleville

Nicolas Pierre Delorme

Denis Duret

Patrick Villard

Pascale Pham

Elisabeth Orsier

Florent Dupont

Nicolas Delorme

Helene Lhermet

Jean-Francois Beche

Hélène Lhermet

Jean-François Beche

An electrical stimulation system including: a mechanism generating at least one electrical signal to be applied to a biological tissue that is to stimulated and measuring a response of the biological tissue to each electrical signal; a calculation mechanism estimating, based on each electrical signal and on a corresponding response of the biological tissue, at least one parameter of an electrical model of the biological tissue and its interface with the electrical stimulation system and determining, using the model, at least one parameter of a stimulation pulse to be applied to the biological tissue by the electrical stimulation system; and a mechanism generating a stimulation pulse to be applied to the biological tissue.

Devices for electrical stimulation of a biological tissue and method for calibrating same

A method for testing a variable capacitance measurement system including a fixed voltage source, a variable capacitance sensor, and a circuit to process information output by this sensor. The method connects an electrically controllable electronic simulation device to replace the variable capacitance sensor, models the electrophysical behaviour of the sensor, and tests the system.

Test method for a variable capacitance measuring system

A DC voltage conversion device including a DC/DC converter and an energy reservoir capable of providing a starting voltage to the DC/DC converter.

Monolithic miniature voltage converter with very low input voltage

A remote transmission device having a fixed station and a portable object provided with an antenna inductively coupled to the station, the object having a variable load impedance connected to terminals of the antenna, and a regulation loop regulating the voltage at terminals of the variable load impedance having rectifier means for rectifying the voltage at the terminals of the antenna and control means designed to modify the variable load impedance according to the output voltage of the rectifier means, and the station emitting an alternating magnetic field modulated in amplitude on 2levels by data to be transmitted, encoded on N bits, the object having demodulation means having an n-bit analog to digital converter, clocked at an oversampling frequency much higher than the frequency of the data and connected between the rectifier means and the control means, and digital processing means connected to the output of the converter.

Portable object having multi-level demodulation and being inductively coupled to a fixed station

An accelerometric measurement device with a return loop including accelerometer, a corrector generating a signal for correction of the position of the accelerometer, a closed return loop to apply this correction signal to the accelerometer, a detector to detect an error in operation of the accelerometer, and a modifying component making at least a first modification to operation of the corrector from its initial state to a modified operating state.

Accelerometer in closed loop with error detection

A sigma-delta modulator comprising: According to the invention, at least one resonator in the modulator is chosen from among the group comprising mechanical, acoustic, electromechanical, electrostatic, optical and chemical resonators. Application to analogue-digital conversion, signal detection and signal generation.

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Grenoble, France

Cyril Condemine