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

Safran

Loïc Sibeud

Guillaume Jourdan

Franck Badets

Sébastien Hentz

Marc Sansa Perna

Romain Grezaud

Houssein Elmi Dawale

A device for generating a supply or bias voltage and a clock signal for a synchronous digital circuit is provided. The device includes an oscillator circuit comprising a propagation path representative of a critical path of the circuit and which varies with a supply or bias voltage to the oscillator, and outputting a periodic signal, the frequency whereof depends on the propagation path delay; a resistive element; a switched capacitor coupled to the output of the oscillator such that the switching frequency thereof corresponds to the frequency of the periodic signal or to a multiple or divisor of this frequency; and an amplifier circuit outputting, from an output coupled to a power supply input or bias input of the oscillator, a voltage, the amplitude whereof is representative of a difference between the resistance R and the equivalent resistance of the switched capacitor.

Device for generating a supply/bias voltage and a clock signal for a synchronous digital circuit

A detecting device configured to detect chemical or biological species in a given environment, includes a matrix-array sensor formed from opto-mechanical discs that are optically and mechanically resonant, able to bind to species of the environment, and arranged in rows and columns. The opto-mechanical discs of a given row are optically coupled to the same optical waveguide. Actuating electrodes are provided in order to ensure the mechanical resonance of the opto-mechanical discs. One p-n junction is associated with each opto-mechanical disc, the junctions of a given column being electrically connected to the same biasing electrode, so as to block the flow through the corresponding opto-mechanical disc of a parasitic electrical current. A control circuit is configured to forward bias, during a time window of read-out of a disc of interest, the p-n junction of a disc of interest so as to place, via a thermo-optical effect, its resonant wavelength at a working wavelength, such that an optical signal propagating through the optical waveguide associated with the disc of interest is amplitude modulated.

Device and method for detecting chemical or biological species

An electronic or electromechanical system including at least one electrical energy source, a first circuit capable of operating in at least two operating modes, one of which corresponds to the stopping of the application circuit, and a circuit for transmitting the electrical energy from the energy source to the application circuit, the transmission circuit being further capable of determining a first value of the maximum instantaneous electric power capable of being supplied by the energy source, of determining a second value of the instantaneous electric power consumed by the application circuit in at least one of the operating modes, and of storing the first and second values or of selecting the operating mode of the application circuit from among said at least two operating modes based on the first and second values.

Electric energy transmission circuit

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Grenoble, France

Loïc Sibeud