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VCC
LTC201
LTC201
5
U11B
2
U11A
16
3
1
4
From U2 pin 3
+5.7
4
3
U7A
1
RED
2
LMC6044
C9
1
.015UF
1
11
9
U11C
R28
LTC201
10
34.8K
VREF
R22
12.1K
10
U7C
8
R41
9
15K
LMC6044
TP85
R36
100K
IR
C111
R66
.01UF
C29
3.32K
.015UF
U7B
5
7
6
8
6
LMC6044
U11D
LTC201
C57
7
C32
.01UF
VREF
R31
1NF
12.1K
R37
13
34.8K
12
R5
15K
TP86
1
REDLED/AV
IRLED/AV
R20
REDDC
3.32K
C7
R67
C61
.01UF
TP54
.01UF
3.32K
R29
REDAC
+
3.32K
C26
C27
C28
.1UF
.47UF
TP55
1NF
R30
100K
C56
U3
.01UF
12
14
X0
X
R60
13
X1
15
3.32K
Y
2
Y0
1
4
PWM1
Y1
Z
5
Z0
3
TP56
Z1
8
VSS
6
INH
R40
11
7
C58
A
VEE
47.5K
10
B
.1UF
9
16
C
VDD
TP57
4053
VCC
REDLED/AV
PWM0
R21
IRDC
3.32K
C8
.01UF
TP58
R33
IRAC
+
3.32K
C30
C31
.1UF
.47UF
TP59
R61
3.32K
/ZERO
BUS
TP76
U7D
TO CPU
14
LMC6044
AC Variable Gain Control Circuit
Figure 9-13
9-37
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