Patent ID: 11962973
Assignee: INFINEON TECHNOLOGIES AG
Field: Measurement (Instruments)
Classification: CPC H  B  G | IPC B  G  H

Claim 10:
11. A packaged MEMS structure comprising:
a substrate comprising a sound port and a contact pad;
a first piezoelectric membrane comprising one or more first electrodes, the first piezoelectric membrane being affixed between a first holder and a second holder;
a second piezoelectric membrane comprising an inertial mass and one or more second electrodes, the second piezoelectric membrane being affixed between the second holder and a third holder, wherein the first, second, and third holders are secured to the substrate;
a plurality of additional piezoelectric membranes configured to provide inertial sensor signal outputs;
an amplifier having first and second inputs coupled to the one or more first electrodes and the one or more second electrodes and an output coupled to the contact pad; and
a selector circuit coupled to the first piezoelectric membrane, the second piezoelectric membrane, and the plurality of additional piezoelectric membranes, the selector circuit configured to selectively output signals received from the first piezoelectric membrane, the second piezoelectric membrane, and the plurality of additional piezoelectric membranes; and
a housing secured to the substrate, enclosing the first piezoelectric membrane, the second piezoelectric membrane, the plurality of additional piezoelectric membranes, and the amplifier, the amplifier positioned in the housing to shield the second piezoelectric membrane from acoustic signals input to the housing through the sound port.