Abstract:
The oscillator comprises at least a first series of a multiple of four sub-assemblies each of which comprises an excitation terminal and an output terminal. The sub-assemblies are arranged in series in a closed loop. The output terminal of each sub-assembly is connected to the excitation terminal of the following sub-assembly. The output terminal of one of the sub-assemblies constitutes the output terminal of the oscillator. Each sub-assembly comprises excitation means and a nanowire which constitutes the electromechanical resonator and the piezoresistive detection means of movement of the resonator. A first terminal of the nanowire is connected to a first supply voltage. The second terminal of the nanowire constitutes the output terminal of the sub-assembly which is grounded via a corresponding resistive circuit. An input terminal of the excitation means constitutes the excitation terminal of the sub-assembly.
Abstract:
A measuring system including: at least two electromechanical resonators each having a resonant frequency varying around an offload resonant frequency according to a physical quantity to be measured; at least one reading device connected to inputs of the resonators and configured to supply an excitation signal on the inputs; and a memory in which is recorded, for each resonator, offload resonance information relating to the offload resonant frequency of the resonator. Each reading device is configured to determine the resonant frequency of one or more resonators selected for reading by configuring at least one element of the reading device using the offload resonance information stored for each selected resonator.
Abstract:
A device with a suspended beam and piezoresistive means of detecting displacement of the beam and a method of manufacturing the device are disclosed. The device comprises a support, a suspended beam, moving parallel to the plane of the support, and means of detecting displacement, comprising at least two piezoresistive strain gauges that are not in line with each other. The beam is suspended through detection means. The two gauges are located on two opposite lateral faces of the beam respectively.
Abstract:
A device for generating a clock signal, including a phase-locked loop including: a controlled oscillator to deliver a clock signal; plural phase comparators to compare a phase of the clock signal delivered by the controlled oscillator with plural clock signal phases applied at an input of the phase-locked loop; a mechanism for weighted summation of output signals of the plural phase comparators such that one or more of the weighting coefficients applied to one of the output signals has an absolute value that overrides the absolute values of the other weighting coefficients applied to the other output signals; and a mechanism filtering the weighted sum of the output signals of the plural phase comparators, to deliver at an output a control signal to the controlled oscillator.
Abstract:
A device for analyzing a fluid, including a layer including a plurality of sensors of MEMS and/or NEMS type, a layer including a mechanism controlling the sensor and for processing information transmitted by the sensors, the control and processing mechanism being electrically connected to the detectors, and a layer positioned on the layer including the sensors on a side of a face including the sensors including a mechanism spatially and temporally distributing the fluid on the sensors.
Abstract:
A device for compensating a delay τ suffered by a first periodic signal ref(t) during propagation between a first and second end of a first transmission connection, comprising at least: first means able to generate a second signal ref(t+τ) corresponding to the first signal ref(t) the phase of which is advanced by a time equal to the delay τ, second means able to generate, from a third signal ref(t−τ) obtained at the second end of the first transmission connection and corresponding to the first signal ref(t) the phase of which is delayed by the delay τ, and from the second signal ref(t+τ), a fourth signal in phase with the first signal ref(t).
Abstract:
A device for compensating a delay τ suffered by a first periodic signal ref(t) during propagation between a first and second end of a first transmission connection, comprising at least: first means able to generate a second signal ref(t+τ) corresponding to the first signal ref(t) the phase of which is advanced by a time equal to the delay τ, second means able to generate, from a third signal ref(t−τ) obtained at the second end of the first transmission connection and corresponding to the first signal ref(t) the phase of which is delayed by the delay τ, and from the second signal ref(t+τ), a fourth signal in phase with the first signal ref(t).