TFE-4/RV-1 Company Confidential
TF5 Technical Information Nokia Customer Care
Page 8a-22 Copyright © 2005 Nokia Corporation. Issue 2.0 Mar/2005
Company Confidential
Figure 16: IGNS Levelshifter realization
BSI-Switch
The BSI-Resistor may only be connected to
Ground when VCAR is in the correct range
(Powerok = active). This is the task of the
BSI-switch.
Figure 17: BSI switch
Description of the Audio Block
Block Diagram of the Audio Block
Figure 18: Block Diagram of Audio-Block
B2BIGN
S
VBIAS
HFMute
Levelshifter
HDMute
Levelshifter
HFMIC
HFSPKR
HDMIC
HDSPK
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