Operating method and circuit arrangement for a capacitive micromechanical sensor with analog reset

A method and a switch arrangement for operating a micromechanical capacitive sensor having at least one and at most two fixed electrodes and one differential capacitor formed by a movable central electrode that can be deflected by an external force, wherein the deflection of the electrode is measure...

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Bibliographic Details
Main Author SPAHLINGER GUENTER
Format Patent
LanguageEnglish
Published 08.05.2012
Subjects
GYROSCOPIC INSTRUMENTS
INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
MEASURING
MEASURING DISTANCES, LEVELS OR BEARINGS
MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK
MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICALDEVICES
MICROSTRUCTURAL TECHNOLOGY
NAVIGATION
PERFORMING OPERATIONS
PHOTOGRAMMETRY OR VIDEOGRAMMETRY
PHYSICS
SURVEYING
TESTING
TRANSPORTING
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Summary:A method and a switch arrangement for operating a micromechanical capacitive sensor having at least one and at most two fixed electrodes and one differential capacitor formed by a movable central electrode that can be deflected by an external force, wherein the deflection of the electrode is measured. A fraction of the force acting on the central electrode, corresponding to the electrostatic restorative force, is compensated. Under closed-loop operation, a selection signal is influenced by a regulator supplementing a restore crosstalk signal so that the created capacitive restorative force acts in a compensatory manner against deflection of the central electrode.
Bibliography:Application Number: US20080451879