Sim2 M80 Betriebsanweisung PDF herunterladen (Seite 19)

M80 EVB User Guide

M80_EVB_User_Guide_V1.2 - 18 -

Figure 12: Earphone circuit

Figure 13: Earphone interface

3.3.3. Loud speaker

M80 module has embedded a class AB amplifier. It can drive up to 800mW speaker. In this case,

the customer can get good audio performance and eliminate an amplifier simultaneously. The test

points are shown as below.

Quectel

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