Quectel UG96 Audio Design Guide

GSM/GPRS Modules
GSM Module Audio Design Guide
GSM Module Audo Design Guide Confidential/Release 9 / 35
2 Audio Circuit Design
M1x and M95 have two hardware audio channels except M80. Three audio channels are defined in
software. AT+QAUDCH is used to read and set the software audio channel. This chapter provides audio
interface circuit and some solutions to resolve TDD noise and ECHO issues.
Table 1：Audio Hardware Configuration
Module
(AIN1/AOUT1)
(AIN2/AOUT2)
AOUT3
MIC
SPK
MIC
SPK
SPK
M1x
Differential &
Internal Bias
Differential
Differential &
Internal Bias
Signal-end
/
M95
Differential &
Internal Bias
Differential
Differential &
Internal Bias
Differential
/
M80
Differential &
Internal Bias
Differential
Differential &
Internal Bias
Signal-end
Differential
1. M95 module has built-in class AB amplifier and also supports voice and ringtone at channel AOUT2.
2. M80 module supports voice and ringtone at channel AOUT2. AOUT1 and AOUT3 can also output
ringtone but via AT+QRCH=1(only used at M80).
3. M80 module has built-in class AB amplifier at channel AOUT3, and the maximum power is 800mW.
Notes
Quectel
Confidential

Quectel UG96 Specifications

General

Brand	Quectel
Model	UG96
Category	Control Unit
Language	English