Invention Application
- Patent Title: METHOD AND APPARATUS FOR ULTRA-LOW POWER SWITCHING MICROPHONE
- Patent Title (中): 用于超低功率开关麦克风的方法和装置
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Application No.: US14600026Application Date: 2015-01-20
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Publication No.: US20150215698A1Publication Date: 2015-07-30
- Inventor: Moshe Haiut
- Applicant: DSP Group LTD.
- Main IPC: H04R3/00
- IPC: H04R3/00

Abstract:
A scheme is described to switch the power supply to the MEMS microphone on and off in a cyclic manner that is synchronized with the associated ADC sampling rate. In this way the MEMS microphone amplifier, whether it is a J-FET transistor or an operational amplifier, is off most of the cycle time, and is turned on only for a few micro-seconds prior to the sample-and-hold timing of the ADC device. By this method, the average power consumption of an existing analog MEMS microphone can be reduced by a factor of 10 or more.
Public/Granted literature
- US09602920B2 Method and apparatus for ultra-low power switching microphone Public/Granted day:2017-03-21
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