公开(公告)号：US20200314559A1

公开(公告)日：2020-10-01

申请号：US16902875

申请日：2020-06-16

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Marco VENERI ,  Alessandro MORCELLI

IPC: H04R23/00 ,  H04R3/06 ,  H04R1/04 ,  H04R3/00 ,  H04R19/00 ,  H04R19/04

Abstract: Described herein is a MEMS acoustic transducer device provided with a micromechanical detection structure that detects acoustic-pressure waves and supplies a transduced electrical quantity, and with an integrated circuit operatively coupled to the micromechanical detection structure and having a reading module that generates at output an audio signal as a function of the transduced electrical quantity. The integrated circuit is further provided with a recognition module, which recognizes a of sound activity event associated to the transduced electrical quantity. The MEMS acoustic transducer has an output that supplies at output a data signal that carries information regarding recognition of the sound activity event.

公开(公告)号：US20220337958A1

公开(公告)日：2022-10-20

申请号：US17735048

申请日：2022-05-02

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Marco VENERI ,  Alessandro MORCELLI

IPC: H04R23/00 ,  H04R3/06 ,  H04R1/04 ,  H04R3/00 ,  H04R19/00 ,  H04R19/04

Abstract: Described herein is a MEMS acoustic transducer device provided with a micromechanical detection structure that detects acoustic-pressure waves and supplies a transduced electrical quantity, and with an integrated circuit operatively coupled to the micromechanical detection structure and having a reading module that generates at output an audio signal as a function of the transduced electrical quantity. The integrated circuit is further provided with a recognition module, which recognizes a of sound activity event associated to the transduced electrical quantity. The MEMS acoustic transducer has an output that supplies at output a data signal that carries information regarding recognition of the sound activity event.

公开(公告)号：US20190326867A1

公开(公告)日：2019-10-24

申请号：US16378872

申请日：2019-04-09

Applicant: STMicroelectronics S.r.l.

Inventor： Alberto DANIONI ,  Alessandro MORCELLI

IPC: H03F3/70 ,  H04R19/04

Abstract: In at least one embodiment, an interface electronic circuit for a capacitive acoustic transducer having a sensing capacitor is provided. The interface electronic circuit includes an amplifier, a voltage regulator, a common-mode control circuit, and a reference generator. The amplifier has an input coupled to an electrode of the sensing capacitor. The voltage regulator is configured to receive a regulator reference voltage, generate a regulated voltage based on the regulator reference voltage, and supply the regulated voltage to a supply input of the amplifier. The common-mode control circuit controls a common-mode voltage present on the input of the amplifier based on a common-mode reference voltage. The reference generator receives a supply voltage and generates the regulator reference voltage and the common-mode reference voltage with respective values that are variable as a function of the supply voltage.