
三合微科股份有限公司
SAMHOP Microelectronics Corp.
SM7183
ECHO
MUTE APPLICATION CIRCUIT
MIC OUTPUT
1K
+5V
1K
1K
10K
+5V
28
-
IC1
1
+
3
4
1K
+5V +5V
+5V 7.5K VR2 2M
3 +- 8
+5V
2
IC2
+- 4
1
10K
+5V
2
3
-
IC3
+
7
4
6
PIN14
VR1
10K
Q1
8550
10μF
VR2
1.46M
1.2M
1.0M
0.8M
0.6M
0.4M
Time
11.0S
9.0S
7.6S
6.0S
4.5S
3.0S
Page 12
V.2.0 MAR. 8, 2002