Commissariat a L'energie Atomique

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

Spryngs

Delorme, Nicolas, Pierre

Saias, Daniel

Nicolas Pierre Delorme

Cyril Condemine

Daniel Saias

Marc Belleville

Eric Colinet

Patrick Villard

Jean-Luc Martin

Claude Bieth

Christophe Le Blanc

Michel Nowak

An accelerometer comprising a plurality of proof-masses moveable along a measurement axis; a respective spring rigidly attached to each proof-mass, configured to exert an elastic recall on the proof-mass in the measurement axis; and a fixed stop associated with each proof-mass, arranged to intercept the proof-mass when the acceleration in the measurement axis increases by a step. The proof-masses are suspended in series with respect to one another by springs in the measurement axis, the stops being arranged to successively intercept the respective proof-masses for increasing thresholds of acceleration.

Low-power accelerometer

The invention relates to a floating state detection circuit of a node, comprising a first conductivity type MOS transistor (M) connected between the node (N) and a first power supply line (Vss); and a second MOS transistor (M) of conductivity type complementary to the first conductivity type, controlled by the node (N) and connected between the gate of the first transistor (M) and a second supply line (Vdd). In addition, a third MOS transistor (M) of the first conductivity type connected between the gate of the first transistor (M) and the first supply line (Vss) may be controlled by the node (N).

Low-power active bias circuit for a high impedance input

The invention relates to an accelerometer comprising a plurality of proof-masses (M-M) moveable along a measurement axis (AB); a respective spring (K-K) rigidly attached to each proof-mass, configured to exert an elastic recall on the proof-mass in the measurement axis; a fixed stop (S-S) associated with each proof-mass, arranged to intercept the proof-mass when the acceleration in the measurement axis increases by a step; and an electrical contact associated with each stop, configured to be closed when the associated proof-mass reaches the stop. The proof-masses are suspended in series with respect to one another by springs in the measurement axis, the stops being arranged to successively intercept the respective proof-masses for increasing thresholds of acceleration.

A reader device () for a contactless remote measurement system by inductive coupling provided with at least one RLC passive sensor () having a resistance and a capacitance or inductance provided for varying depending on one or more physical parameters, the measurement of which is desired, the reader including an inductive antenna (), and means for iterative identification of at least the resistance and the capacitance or inductance of said sensor, provided for carrying out an iterative identification method comprising steps consisting of:

Near field remote measurement architecture for remote passive {R, L, C} type sensor

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 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

This invention relates to a device for switching and controlling an electron dose emitted by a micro-emitter comprising

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Grenoble, France

Nicolas Pierre Delorme