Microphone Interfaces Configuration; Earphone Interface Configuration; Audio Electronic Characteristics - SimCom SIM900B Hardware Design

3.7.2

Microphone Interfaces Configuration

3.7.3

Earphone Interface Configuration

3.7.4

Audio Electronic Characteristics

SIM900B_Hardware Design_V2.01
Figure 20: Microphone reference circuit
Figure 21: Earphone reference circuit
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2012-05-07