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Smart LTE Module Series
SC650T Hardware Design
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3.23.1. Reference Circuit Design for Microphone Interfaces
AMICx_P
ECM-MIC
R2
R1
Module
AMICx_M
0R
0R
R3
1.1K
MIC_BIASn
R4
1.1K
0.1uF
C1
Figure 25: Reference Circuit Design for Analog ECM-type Microphone
AMICx_P
MEMS-MIC
R2
R1
Module
AMICx_M
0R
MIC_BIASn
1
2
3
4
OUT
GND
GND
VDD
100nF
C4
0R
R3
0R
Figure 26: Reference Circuit Design for MEMS-type Microphone