msm7620 Oki Semiconductor, msm7620 Datasheet - Page 17

• Manufacturer Part Number: msm7620
• Description: Echo Canceler
• Manufacturer: Oki Semiconductor

¡ Semiconductor
HOW TO USE THE MSM7620
The MSM7620 cancels the echo which returns to SIN using the RIN signal.
Connect the base signal to the R-side and the echo generated signal to the S-side.
Connection Methods According to Echos
Example 1:
Example 2:
Example 3:
Microphone input
Microphone Input
Acoustic echo
Canceling acoustic echo (to handle acoustic echo from line input)
Canceling line echo (to handle line echo from microphone input)
Canceling line echo in a cascade connection
(to handle line echo from microphone input)
CODEC
m-law
CODEC
m-law
CODEC
m-law
ROUT
SIN
SOUT
RIN
SOUT
MSM7620
RIN
+
MSM7620
AFF
+
Master
–
Slave
AFF
AFF
MSM7620
+
–
–
AFF
+
+
RIN
SOUT
SIN
+
ROUT
PD0 - 15
SIN
ROUT
CODEC
m-law
CODEC
m-law
CODEC
m-law
Line echo
H
Line echo
H
H
MSM7620
Line input
H
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