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

Université Savoie Mont Blanc

Centre National De La Recherche Scientifique

Adrien Morel

Gaël Pillonnet

Adrien Badel

Franck Badets

Ghislain Despesse

Gérard Billiot

Tristan Meunier

Romain Grezaud

Mustapha Touhami

Nicolas Goux

Pierre Gasnier

Yohan Wanderoild

Mikhail Manokhin

A quantum device includes multiple spin qubits, multiple electrometers, each being capacitively coupled to one of the spin qubits, multiple injection-locked oscillators, each being coupled to one of the electrometers and designed to transmit an excitation signal to the electrometer to which it is coupled, each excitation signal having a different frequency, an amplification circuit comprising at least one amplifier, wherein the device comprises a feedback loop coupling the output of the amplification circuit to an input of each injection-locked oscillator and through which an injection signal flows, each injection-locked oscillator being designed to receive the injection signal and, as a function of the injection signal, maintain or decrease its excitation signal.

Quantum device

A quantum device includes several spin qubits arranged as a matrix and each comprising a quantum dot; several electrometers each electrostatically coupled to a potential well of one of the quantum dots; and circuits for applying an excitation signal to an input electrode of each electrometer. The circuits are configured such that a value of the frequency, phase or maximum amplitude of each excitation signal is different from that of the other excitation signals, and the circuits apply a same excitation signal on electrometers coupled to a same row of qubits. The device also includes a transimpedance amplifier having an input coupled to output electrodes of the electrometers and a demultiplexing circuit including an input electrically coupled to an output of the transimpedance amplifier and configured to demultiplex the output signals to be delivered by the electrometers.

Quantum device with multiplexed electrometer output signals

A device for recovering or dampening vibratory energy from a mechanical resonator, comprising:

Device for recovering or damping the vibratory energy of a resonant mechanical element

An electronic control device for controlling a converter that comprises a piezoelectric element and a plurality of switches which are commanded to alternate phases, respectively at substantially constant voltage, and substantially constant charge, across the terminals of said piezoelectric element, the control device comprising:

Electronic device and method for controlling an electric energy converter comprising a piezoelectric element, related electronic system for electric energy conversion

The present disclosure relates to a method of tuning an electric charge extraction circuit of a vibrational energy harvester having a mechanical resonator, the method comprising varying, during a first phase, first and second parameters (&#x3c8;,&#x3c8;) of the electric charge extraction circuit based on detected harvested power (P), each of the first and second parameters (&#x3c8;,&#x3c8;) influencing the amount of damping of the mechanical resonator and at least the first parameter (&#x3c8;) influencing the resonance frequency of the mechanical resonator, wherein the first and second parameters (&#x3c8;,&#x3c8;) are varied during the first phase such that the amount of damping remains constant or varies by less than a first significant amount and the resonance frequency reaches a final level.

Circuit and method for frequency tuning of a vibrational energy harvester

The invention concerns a circuit for recuperating electrical energy from a mechanical resonator () comprising: a voltage inversion circuit () configured to invert the voltage across a capacitance (Cp) of the mechanical resonator, the voltage inversion circuit comprising: a capacitor (Cint); and a charge transfer circuit configured: to discharge a voltage of a first polarity held by the capacitance of the mechanical resonator to said capacitor during a first period; and to charge a voltage, of opposite polarity to the first polarity, to the capacitance of the mechanical resonator during a second period using the voltage potential stored by said capacitor during the first period; wherein the charge transfer circuit comprises an inductance and at least one switch controllable to limit the current passing through the inductance.

Circuit and method for energy recuperation

A piezoelectric generator including: a piezoelectric element; a circuit for shorting and placing in open circuit the piezoelectric element; and an inductive converter.

Growing community of inventors

Grenoble, France

Adrien Morel