Sim2 M80 Guia do Utilizador descarregar pdf (Página 18)

M80 EVB User Guide

M80_EVB_UGD_V1.2 - 17 -

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 retrench an amplifier simultaneously. The test

points are shown as below.

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