U4089B-MFN ATMEL [ATMEL Corporation], U4089B-MFN Datasheet - Page 7

• Manufacturer Part Number: U4089B-MFN
• Description: MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
• Manufacturer: ATMEL [ATMEL Corporation]

Figure 7. Integration of the Acoustic Feedback-suppression Circuit Into the Speech Circuit Environment
4570A–CORD–04/03
SAO
GSA
GT
SAI
SAI
Figure 6. Basic Voice-switch System
TLDR
INLDT
microphone
speaker
VBG
Handset
Loud
Max
att.
control
AFS
+
-
INLDR
+
-
VBG
TLDT
AGA
Logarithmic
RECO
STO
GR
Attenuation
attenuation
attenuation
control
TX
RX
VL
STI
STN
Zint
V
Logarithmic
B
RECIN
STO
Z
L
V
L
U4089B-M
Hybrid
Line
7