Quectel GSM Series - SPK Reference Circuit

GSM/GPRS Modules
GSM Module Audio Design Guide
GSM Module Audo Design Guide Confidential/Release 15 / 35
2.1.3.3. SPK Reference Circuit
LOUDSPKN
ESD
ESD
0R
0R
LOUDSPKP
8 ohm
Module
GND
Close to Speaker
10pF
33pF
33pF10pF
10pF
33pF
GND
Differential
layout
Figure 10：SPK Reference Circuit
Quectel
Confidential