Microelectromechanical device incorporating a gyroscope and an accelerometer
First Claim
1. A microelectromechanical device, comprising:
- a supporting structure;
a first sensing mass and a second sensing mass, each movable with respect to the supporting structure, both movable according to a first axis and each movable according to a respective second axis, perpendicular to the first axis;
a driving device configured to maintain the first sensing mass and the second sensing mass in oscillation along the first axis in phase opposition;
a first group of sensors and a second group of sensors configured to supply sensing signals, respectively indicative of displacements of the first sensing mass and of the second sensing mass according to the second axis; and
processing components configured to;
combine the sensing signals in a first sensing mode and in a second sensing mode,amplify in the first sensing mode, effects on the sensing signals of concordant displacements of the first sensing mass and of the second sensing mass, and attenuate effects of discordant displacements of the first sensing mass and of the second sensing mass; and
amplify in the second sensing mode, effects on the sensing signals of discordant displacements of the first sensing mass and of the second sensing mass, and attenuate effects of concordant displacements of the first sensing mass and of the second sensing mass.
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Accused Products
Abstract
A microelectromechanical device includes: a supporting structure; two sensing masses, movable with respect to the supporting structure according to a first axis and a respective second axis; a driving device for maintaining the sensing masses in oscillation along the first axis in phase opposition; sensing units for supplying sensing signals indicative of displacements respectively of the sensing masses according to the respective second axis; processing components for combining the sensing signals so as to: in a first sensing mode, amplify effects on the sensing signals of concordant displacements and attenuate effects of discordant displacements of the sensing masses; and in a second sensing mode, amplify effects on the sensing signals of discordant displacements and attenuate effects of concordant displacements of the sensing masses.
32 Citations
23 Claims
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1. A microelectromechanical device, comprising:
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a supporting structure; a first sensing mass and a second sensing mass, each movable with respect to the supporting structure, both movable according to a first axis and each movable according to a respective second axis, perpendicular to the first axis; a driving device configured to maintain the first sensing mass and the second sensing mass in oscillation along the first axis in phase opposition; a first group of sensors and a second group of sensors configured to supply sensing signals, respectively indicative of displacements of the first sensing mass and of the second sensing mass according to the second axis; and processing components configured to; combine the sensing signals in a first sensing mode and in a second sensing mode, amplify in the first sensing mode, effects on the sensing signals of concordant displacements of the first sensing mass and of the second sensing mass, and attenuate effects of discordant displacements of the first sensing mass and of the second sensing mass; and amplify in the second sensing mode, effects on the sensing signals of discordant displacements of the first sensing mass and of the second sensing mass, and attenuate effects of concordant displacements of the first sensing mass and of the second sensing mass. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An electronic system, comprising:
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a control unit; and a microelectromechanical sensor coupled to the control unit, the sensor including; a supporting structure; a first sensing mass and a second sensing mass, each movable with respect to the supporting structure according to a first axis and according to a second axis, perpendicular to the first axis; a driving device configured to maintain the first sensing mass and the second sensing mass in oscillation along the first axis in phase opposition; a first group of sensors and a second group of sensors configured to supply sensing signals indicative of displacements of the first sensing mass and of second sensing mass, respectively according to the second axis; and processing components, configured to; combine the sensing signals in a first sensing mode and in a second sensing mode, amplify in the first sensing mode, effects on the sensing signals of concordant displacements and attenuate effects of discordant displacements of the first sensing mass and of the second sensing mass; and amplify in the second sensing mode, effects on the sensing signals of discordant displacements and attenuate effects of concordant displacements of the first sensing mass and of the second sensing mass. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method, comprising:
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oscillating a first sensing mass and a second sensing mass along a first axis in phase opposition; maintaining the oscillating of the first sensing mass and the second sensing mass with a driving device; generating sensing signals from a first group of sensors and a second group of sensors in response to displacements of the first sensing mass and of the second sensing mass, respectively, with regard to a second axis, perpendicular to the first axis; combining the sensing signals in a first sensing mode and in a second sensing mode with processing components, the combining including; amplifying during the first sensing mode, effects on the sensing signals of concordant displacements of the first sensing mass and of the second sensing mass; attenuating during the first sensing mode effects of discordant displacements of the first sensing mass and of the second sensing mass; amplifying during the second sensing mode, effects on the sensing signals of discordant displacements of the first sensing mass and of the second sensing mass; and attenuating during the second sensing mode effects of concordant displacements of the first sensing mass and of the second sensing mass. - View Dependent Claims (22, 23)
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Specification