u4090b-p ATMEL Corporation, u4090b-p Datasheet - Page 10

• Manufacturer Part Number: u4090b-p
• Description: U4090b-p Monolithic Integrated Feature Phone Circuit Emi Improved
• Manufacturer: ATMEL Corporation

Figure 3-4.
Figure 3-5.
10
U4090B-P
Basic Voice Switch System
Integration of the Acoustic Feedback Suppression Circuit into the Speech Circuit Environment
GSA
SAO
GT
Loudspeaker
microphone
Handset
MICO
SAI
SAI
TLDR
TIN
Log
INLDT
INLDR
VBG
control
+
-
Max
att.
AFS
VBG
contr
TX
Att
Att
RX
Att
+
-
TLDT
AGA
RECO1
Log
GR STIS
TXA
STO
VL
Hybrid
STN
Line
Zint
RECIN
STO
Z
L
VL
4741C–CORD–11/05