Abstract: A MEMS sensor (1) comprises a MEMS transducer (10) being coupled to a MEMS interface circuit (20). The MEMS interface circuit (20) comprises a bias voltage generator (100), a differential amplifier (200), a capacitor (300) and a feedback control circuit (400). The bias voltage generator (100) generates a bias voltage (Vbias) for operating the MEMS transducer. The variable capacitor (300) is connected to one of the input nodes (I200a) of the differential amplifier (200). At least one of the output nodes (A200a, A200b) of the differential amplifier is coupled to a base terminal (T110) of an output filter (110) of the bias voltage generator (100). Any disturbing signal from the bias voltage generator (100) is a common-mode signal that is divided equally on the input nodes (I200a, I200b) of the differential amplifier (200) and is therefore rejected.

Abstract: An electronic device is provided, which includes a printed circuit board (PCB), a housing receiving the PCB and including a through-hole connected to an outside of the electronic device, an electronic component connected with the PCB and accessible from the outside via the through-hole, and a sealing member disposed between a surrounding of the through-hole and the electronic component and shaped as a closed loop. The housing includes a sealing area disposed inside the housing along the surrounding of the through-hole and contacting the sealing member, a rib projecting towards an inside of the housing from an end of the sealing member, supporting the electronic component, and limiting movement of the electronic component by an external force, and a recess formed in an area of the rib, at least a portion of the recess that is flush with a surface of the sealing area.

Abstract: An electronic device is provided, which includes a printed circuit board (PCB), a housing receiving the PCB and including a through-hole connected to an outside of the electronic device, an electronic component connected with the PCB and accessible from the outside via the through-hole, and a sealing member disposed between a surrounding of the through-hole and the electronic component and shaped as a closed loop. The housing includes a sealing area disposed inside the housing along the surrounding of the through-hole and contacting the sealing member, a rib projecting towards an inside of the housing from an end of the sealing member, supporting the electronic component, and limiting movement of the electronic component by an external force, and a recess formed in an area of the rib, at least a portion of the recess that is flush with a surface of the sealing area.

Abstract: A MEMS sensor (1) comprises a MEMS transducer (10) being coupled to a MEMS interface circuit (20). The MEMS interface circuit (20) comprises a bias voltage generator (100), a differential amplifier (200), a capacitor (300) and a feedback control circuit (400). The bias voltage generator (100) generates a bias voltage (Vbias) for operating the MEMS transducer. The variable capacitor (300) is connected to one of the input nodes (I200a) of the differential amplifier (200). At least one of the output nodes (A200a, A200b) of the differential amplifier is coupled to a base terminal (T110) of an output filter (110) of the bias voltage generator (100). Any disturbing signal from the bias voltage generator (100) is a common-mode signal that is divided equally on the input nodes (I200a, I200b) of the differential amplifier (200) and is therefore rejected.

Abstract: A fiber-optic measurement device (10) includes a SAGNAC ring interferometer (20) having a proper frequency fp. The aim is to improve response time while maintaining high precision across the measurement range. Biasing elements (130) are used to produce: a first biasing phase-differential modulation component ??b1(t) (34) which is periodic in time-slots, having levels +? and ??, at a first biasing modulation frequency fb1 such that fb1=(2k1+1) fp, k1 being a natural number; and a second periodic biasing phase-differential modulation component ??b2(t) (35), having extreme amplitudes +?/a and ??/a, a being a non-zero real number such that |a|>1, at a second biasing modulation frequency fb2 such that fb2=(2k2+1) fp, k2 being a non-zero natural number such that k2>k1. A gyrometer including such a measurement device and a navigation or inertial-stabilization system including at least one such gyrometer are also described.

Abstract: A fiber-optic measurement device (10) includes a SAGNAC ring interferometer (20) having a proper frequency fp. The aim is to improve response time while maintaining high precision across the measurement range. Biasing elements (130) are used to produce: a first biasing phase-differential modulation component ??b1(t) (34) which is periodic in time-slots, having levels +? and ??, at a first biasing modulation frequency fb1 such that fb1=(2k1+1) fp, k1 being a natural number; and a second periodic biasing phase-differential modulation component ??b2(t) (35), having extreme amplitudes +?/a and ??/a, a being a non-zero real number such that |a|>1, at a second biasing modulation frequency fb2 such that fb2=(2k2+1) fp, k2 being a non-zero natural number such that k2>k1. A gyrometer including such a measurement device and a navigation or inertial-stabilization system including at least one such gyrometer are also described.