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

2.1.4.3. Headset Reference Circuit

Module

2.1.4.4. SPK Reference Circuit

Module
LOUDSPKP
LOUDSPKN
GSM Module Audo Design Guide
Differential
layout
MIC2N
MIC2P
22uF
SPK2P
AGND
Figure 15：Headset Reference Circuit
Differential layout
Figure 16：SPK Reference Circuit
GSM Module Audio Design Guide
Close to Socket
4.7uF
33pF
33pF 10pF
GND
Close to speaker
GND
10pF 33pF
100pF
10pF 33pF
GND
Confidential/Release
GSM/GPRS Modules
GND
33pF
ESD
68R
3
4
ESD
2
1
Amphenol
9001-8905-050
AGND
ESD
0R
0R
ESD
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