
Figure 61 Audio block diagram
Internal microphone
Internal microphone is used for HandPortable (HP) and Internal HandsFree (IHF) call modes.
An analogue electret microphone is connected to N2200 Mic1P and Mic1N inputs via asymmetric electrical
connection.
The microphone is biased by N2200 MicB1 bias voltage output.
RM-123; RM-145
System Module
Nokia Customer Care
Issue 1
COMPANY CONFIDENTIAL
Page 8 –15
Copyright © 2006 Nokia. All rights reserved.