Users Manual

GSM/GPRS Module Series
M66 Hardware Design
M66_Hardware_Design Confidential / Released 47 / 82
Figure 25: Handset Interface Design for AOUT2
Figure 26: Speaker Interface Design with an Amplifier for AOUT2
The suitable differential audio amplifier can be chosen from the Texas Instrument’s website
(http://www.ti.com/
). There are also other excellent audio amplifier vendors in the market.
1.
The value of C1 and C2 here depends on the input impedance of audio amplifier.
NOTE