Abstract: A system for detecting responses of a MEMS resonator device includes first and second signal sources, a signal divider and a frequency mixer. The first signal source provides a first signal and the second signal source provides a second signal that electrostatically drives the MEMS resonator device, causing mechanical vibration. The signal divider divides the first signal into a probe signal and a local oscillator (LO) signal, the probe signal being applied to the MEMS resonator device and reflected by a capacitance of the MEMS resonator device. A reflection coefficient is modulated onto the reflected probe signal at the mechanical resonance frequency by variations in the capacitance induced by the mechanical vibration of the MEMS resonator device. The frequency mixer mixes the reflected probe signal and the LO signal and outputs an intermediate frequency (IF) signal, which represents modulation of the reflection coefficient, providing an image of the mechanical vibration.

Abstract: An injection device for injecting injection material, comprising: an elastic deformable element (3) able to exert a pushing force on a piston (20) of a syringe (2) so as to eject a quantity of injection material out of the syringe (2); a stopper (4) for retaining the extension of said spring (3) when the stopper is in a first position (A) and for releasing the extension of said elastic deformable element when the stopper is in a second position (B); an electric actuator (5) for moving the stopper (4) from its first position to its second position or from its second position to its first position.

Abstract: An injection device for aesthetic medicine, for administering a fluid material beneath the skin of a person by means of a syringe. The injection device includes a motor system with a motor configured to drive a first piston, and at least a syringe cover adapted to be mounted on the motor system and to accommodate a syringe comprising at least a syringe barrel for accommodating the filling material, a syringe needle and a second piston located in the syringe and drivable by the first piston for ejecting a quantity of fluid material out of the syringe. The motor system is cable-free and electrically actuated.

Abstract: A system for detecting responses of a MEMS resonator device includes first and second signal sources, a signal divider and a frequency mixer. The first signal source provides a first signal and the second signal source provides a second signal that electrostatically drives the MEMS resonator device, causing mechanical vibration. The signal divider divides the first signal into a probe signal and a local oscillator (LO) signal, the probe signal being applied to the MEMS resonator device and reflected by a capacitance of the MEMS resonator device. A reflection coefficient is modulated onto the reflected probe signal at the mechanical resonance frequency by variations in the capacitance induced by the mechanical vibration of the MEMS resonator device. The frequency mixer mixes the reflected probe signal and the LO signal and outputs an intermediate frequency (IF) signal, which represents modulation of the reflection coefficient, providing an image of the mechanical vibration.

Abstract: A superheterodyne circuit includes at least one reception input, at least one production output wherefrom can be produced a baseband signal and at least one band-pass filter for channel selection interposed in the signal path between the input and the output. The filter is adapted to be connected to elements for measuring a characteristic frequency of signal passage in the filter, controllable shifting elements for frequency shift are arranged in the signal path, and control elements are provided, connected to the measuring elements and controlling the shifting elements with a supplementary signal, which compensates the difference of the measured characteristic frequency relative to a prescribed characteristic frequency value of the filter passage and whereof the frequency is determined based on the position of the path of the shifting elements relative to the filter.

Abstract: A semiconductor infrared detector includes in the following order: a semiconductor substrate; a layer of electrically insulating material; and patterns formed in a semiconductor layer. The patterns are formed from at least one island that is connected to bridges which are connected to polarization electrodes. The bridges are lines having an approximately constant width lp and the islands are zones having a width li that is greater than that of the lines.

Abstract: The splint for surgical operations on the knee comprises a member for holding the ankle and the foot, immobilizing the leg in a folded position in a substantially vertical plane, and a fastening means connecting the holding member to a stand enabling the splint to be rested on the operating table. The splint is articulated about a substantially horizontal pin permitting the holding member to rock in a vertical plane is fixed on the stand by means of a longitudinal slide groove made on the stand along the axis of projection of the leg. The slide groove allows travel and positioning of the fastening means. The stand located in the sterile region fits in a support rendered integral with the operating table and the fastening means comprises a substantially vertical pivot allowing lateral deflection of the holding member.

Abstract: A support housing for a semiconductor wafer which is centered therein between the anode block and the cathode block. It includes two polygonal insulating plates which bear against each of the blocks fitted with notches at 120.degree. to one another in which insulating pins are snap-fitted. In the case of a thyristor, a flexible wire is connected to a contact piece with a spherical end in contact with the trigger of the thyristor by means of a spiral spring. Application to the railway field.

Abstract: A device for protecting the connectors of an electronic power assembly disposed in an enclosure which contains a fluorinated hydrocarbon. The connectors are isolated by connecting them to a sealed terminal box through a chamber between the enclosure cover and the terminal box sealed by means of a seal.Applications: Electric equipment in the railway and highway field.