Reference Design For Earpiece Interface - Quectel SC200K Series Instruction Manual

Module
Figure 27: Reference Circuit Design for Auxiliary Microphone

4.12.2. Reference Design for Earpiece Interface

EAR_P
EAR_M
GND
Module
SC200K_Series_Hardware_Design
MIC3_P
MIC3_M
GND
Figure 28: Reference Design for Earpiece Interface
C1
NM
C3
C2
NM
NM
C2
33 pF
R1
0R
C1
100 pF
R2
0R
C3
33 pF
Smart Module Series
F1
1
MIC_P
2
MIC_N
F2
ECM MIC
D2
D1
R5
NM
D1 D2
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