Receiver Reference Circuit; Headset Reference Circuit - Quectel GSM Series Audio Design Manual

2.1.3.1. Receiver Reference circuit

Module
SPK1P
SPK1N

2.1.3.2. Headset Reference Circuit

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