公开(公告)号：US20230121912A1

公开(公告)日：2023-04-20

申请号：US17451562

申请日：2021-10-20

Applicant: Infineon Technologies AG

Inventor： Jose Luis Ceballos ,  Hong Chen ,  Fulvio Ciciotti ,  Andreas Wiesbauer ,  Bernhard Wotruba

IPC: H04R1/08 ,  H03F3/183

Abstract: A microphone includes an amplifier coupled to an input node of the microphone; a shock detector coupled to the input node of the microphone; and a recovery circuit having an input coupled to an output of the shock detector, and an output coupled to the input of the microphone.

公开(公告)号：US20230396907A1

公开(公告)日：2023-12-07

申请号：US17805348

申请日：2022-06-03

Applicant: Infineon Technologies AG

Inventor： Hong Chen ,  Niccoló De Milleri ,  Andreas Wiesbauer

IPC: H04R1/08 ,  H03F3/183

CPC classification number: H04R1/08 ,  H03F3/183 ,  H03F2200/03 ,  H04R2201/003

Abstract: A microphone includes a MEMS device having an output node for generating an analog voltage in response to an input sound wave or vibration; a source follower having a control node coupled to the output node of the MEMS device, a current path coupled between a first controlled node and a second controlled node, and a bulk node, wherein the first controlled node is configured for providing a microphone output voltage, and wherein the second controlled node is coupled to a reference voltage; a current source coupled to the first controlled node; and a voltage differential between the first controlled node and the bulk node, wherein a nonzero value of the voltage differential is configured such that a first 1% total harmonic distortion (THD) cross-point of the microphone output voltage is greater than a second 1% THD cross-point of the microphone output voltage using a zero value voltage differential.