Speaker Interface Configuration - Quectel M20 Hardware Design

M20 Hardware Design

3.10.2 Speaker interface configuration

SPK1P
Moudule
SPK1N
Figure 27: Speaker interface configuration of AOUT1
SPK1P
Module
SPK1N
Figure 28: Speaker interface with amplifier in AOUT1
M20_HD_V1.01
Differential layout
Differential layout
Close to speaker
10pF
10pF
10pF
Close to speaker
Amplifier
10pF
circuit
10pF
10pF
GND
ESD
33pF
ANTI
33pF
ESD
33pF
ANTI
GND
GND
ESD
33pF
ANTI
33pF
ESD
33pF
ANTI
GND
- 51 -