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Quectel Wireless Solutions Company Limited 201404UC15M 用户手册

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UMTS/HSDPA  Module  Series 
                                                                                                                  UC15  Mini  PCIe  Hardware  Design
 
 
UC15_Mini_PCIe_Hardware_Design                    Confidential / Released                                  28 / 40 
 
 
 
 
Figure 13: Reference Design of Receiver 
 
Figure 14: Reference Design with an Amplifier for Speaker 
 
Texas Instruments TPA6205A1 is recommended for a suitable differential audio amplifier. 
 
1
2
4
3
MICP
22uF
68R
33pF
GND
AGND
Close to connector
33pF
10pF
GND
Module
4.7uF
SPKP
Close to module
GND
33pF
33pF
Differential 
layout
33pF
MICN
0603
0603
0603
0603
0603
0603
0603
10pF
GND
10pF
0603
0603
0603
10pF
10pF
0R
GND
AGND
Earphone
Interface
 
Figure 15: Reference Design of Earphone