User's Manual

GSM/GPRS Module Series
M35 User Manual
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3.8.3. Receiver Interface Design
SPK1P
SPK1N
Differential layout
Module
10pF
0603
Close to speaker
GND
ESD
33pF
0603
33pF
0603
GND
10pF
0603
ESD
10pF
0603
33pF
0603
Figure 25: Reference Interface Design of AOUT1
3.8.4. Earphone Interface Design
1
2
4
3
Amphenol
9001-8905-050
MIC2P
22uF
68R
33pF
GND GND
AGND
Close to Socket
AGND
33pF
10pF
GND
GND
GND
GND
AGND
Module
4.7uF
LOUDSPKP
Close to Module
GND
GND
33pF
33pF
Differential
layout
33pF
MIC2N
0R
0603
0603
0603
0603
0603
0603
0603
10pF
ESD
ESD
10pF
10pF
10pF
0603
0603
0603
Figure 26: Earphone Interface Design