Patent ID: 11965906
Assignee: STMICROELECTRONICS S.R.L.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A closed-loop microelectromechanical accelerometer, comprising:
a supporting body;
an out-of-plane sensing mass having a first side facing and coupled to the supporting body, a second side opposite to the first side, the out-of-plane sensing mass is connected to the supporting body to oscillate around a non-barycentric fulcrum axis parallel to the first side and to the second side and perpendicular to an out-of-plane sensing axis; and
sensing electrodes capacitively coupled to the sensing mass and configured to sense an angular position of the sensing mass around the fulcrum axis, wherein the sensing electrodes include:
a first sensing electrode and a second sensing electrode, the first and second sensing electrodes are arranged on the supporting body symmetrically with respect to the fulcrum axis and facing the first side of the out-of-plane sensing mass; and
a third sensing electrode and a fourth sensing electrode, the third and fourth sensing electrodes are supported by respective sensing supports symmetrically with respect to the fulcrum axis and facing the second side of the out-of-plane sensing mass,

wherein the respective sensing supports include:
respective first structures anchored to the supporting body and extending in a direction parallel to the out-of-plane sensing axis through openings in the out-of-plane sensing mass; and
respective second structures that extend from the respective first structures in a direction perpendicular to the out-of-plane sensing axis and face the second side of the out-of-plane sensing mass.