u4089b-m ATMEL Corporation, u4089b-m Datasheet - Page 8

• Manufacturer Part Number: u4089b-m
• Description: Multi-standard Feature Phone Circuit With Voice Switch
• Manufacturer: ATMEL Corporation

U4089B-M
8 (23)
Figure 9. Acoustic feedback suppression by alternative control of transmit- and speaker amplifier gain
Figure 8. Integration of the acoustic feedback-suppression circuit into the speech circuit environment
SAO
GSA
RLDT
RLDR
GT
SAI
SAI
INLDR
INLDT
TLDR
TLDT
INLDT
VBG
TLDR
Max
att.
control
AFS
+
–
INLDR
+
–
VBG
TLDT
RATAFS
AGA
TXA
IATGSA
RECO
ATAFS
STO
GR
SAI
IAGAFS
AGA
GSA
VL
STI
STN
Zint
V B
IGSA
AGA
12693
RECIN
STO
Rev. A3, 06-Mar-01
Z L
12691
V L