GSM/GPRS Modules
GSM Module Audio Design Guide
GSM Module Audo Design Guide Confidential/Release
14 / 35
2.1.3.1. Receiver Reference circuit
SPK1P
SPK1N
Differential layout
10pF
10pF
33pF
33pF
33pF
GND
10pF
ESD
ESD
Module
Close to Receiver
GND
Figure 8
：
Receiver Reference Circuit for AOUT1
2.1.3.2. Headset Reference Circuit
1
2
4
3
Amphenol
9001-8905-050
MIC2P
22uF
68R
33pF
GND
AGND
Close to Socket
33pF
AGND
33pF
10pF
GND
Module
4.7uF
LOUDSPKP
Close to Module
GND
GND
GND
GND
10pF
33pF
33pF
10pF
Differential
layout
33pF
10pF
MIC2N
0R
ESD
ESD
Figure 9
：
Headset Reference Circuit
Quectel
Confidential
