Microphone Interfaces Configuration - SIM Tech SIMCom SIM900-DS Hardware Design

4.6.2

Microphone Interfaces Configuration

microphone as close as
ESD
ANTI
Electret
Microphone
ESD
ANTI
Microphone input also could be used to LINE-IN input. For details, please refer to document [6].
SIM900-DS_Hardware Design_V1.00
Figure 22: Speaker with amplifier reference circuit
These components
should be placed to
possible
The lines in bold type should
10pF 33pF
be accorded to differential
10pF
33pF
10pF 33pF
Figure 23 : Microphone reference circuit
signal layout rules
MIC_1P
MIC_1N
27
Smart Machine Smart Decision
MODULE
s
2013-01-20