Invention Grant
- Patent Title: MEMS microphone with programmable sensitivity
- Patent Title (中): 具有可编程灵敏度的MEMS麦克风
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Application No.: US12962136Application Date: 2010-12-07
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Publication No.: US08831246B2Publication Date: 2014-09-09
- Inventor: Olafur Mar Josefsson
- Applicant: Olafur Mar Josefsson
- Applicant Address: US CA San Jose
- Assignee: Invensense, Inc.
- Current Assignee: Invensense, Inc.
- Current Assignee Address: US CA San Jose
- Agency: IPxLaw Group LLP
- Agent Maryam Imam
- Main IPC: H03G3/00
- IPC: H03G3/00 ; H03G11/00 ; H04R3/00 ; H04R19/00 ; H04R19/04 ; H04R19/01
Abstract:
A control circuit monitors a signal produced by a MEMS or other capacitor microphone. When a criterion is met, for example when the amplitude of the monitored signal exceeds a threshold or the monitored signal has been clipped or analysis of the monitored signal indicates clipping is imminent or likely, the control circuit automatically adjusts a bias voltage applied to the capacitor microphone, thereby adjusting sensitivity of the capacitor microphone.
Public/Granted literature
- US20110142261A1 MEMS Microphone with Programmable Sensitivity Public/Granted day:2011-06-16
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