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1BP[0..12]
1BP[0..12]
H4
2
1BP12
+15V
C304
0.1uF
1BP12
8
7 6
U64D
DG412-D
9
10 11
U64C
DG412-D
C127
0.1UF
1%
C319
3900PF
1%
+15V
C307
0.1uF
+5A+15V
A-15V
1
2 3
13 12
5 4
U64A
DG412-D
16
15 14
U64B
DG412-D
C318
3900PF
1%
C133
0.1UF
1%
Logic "1" inserts filter.
TP15
ABPF
A
8
7
11
U66B
5532-SOIC
15
16 1
4 3
10
9 8
5 6
11 12
13 14
U67
DG403
-15V
A
A
C306
22pF
A
A
C308
0.1uF
R137
2.00K
1
2
13
1
2
4
U66A
5532-SOIC
+15V
A
AA
C139
0.1uF
C132
10uF
1BP0
1BP1
1BP2
1BP3
1BP4
1BP5
1BP6
1BP7
1BP8
1BP9
1BP10
1BP11
A
R138
2.00K
8
7
11
U63B
5532-SOIC
B12(LSB)
15
B11
14
B10
13
B9
12
B8
11
B7
10
B6
9
B5
8
B4
7
B3
6
B2
5
B1(MSB)
4
VREF
17
OUT1
1
OUT2
2
RFEEDBK
18
VD+
16
GND
3
U65
AD7541
+15V
A
-15V
B12(LSB)
15
B11
14
B10
13
B9
12
B8
11
B7
10
B6
9
B5
8
B4
7
B3
6
B2
5
B1(MSB)
4
VREF
17
OUT1
1
OUT2
2
RFEEDBK
18
VD+
16
GND
3
U62
AD7541
A A
C138
0.1uF
C131
10uF
A
C303
22pF
A
A
C305
0.1uF
A
1
2
13
1
2
4
U63A
5532-SOIC
1BP0
1BP1
1BP2
1BP3
1BP4
1BP5
1BP6
1BP7
1BP8
1BP9
1BP10
1BP11
+15V
-15V
A
A
1
2
13
1
2
4
U61A
5532-SOIC
C129
0.1uF
C325
497PF
R144
2.00K
C326
65PF
R145
2.00K
A_BPF
H3
2
15
16 1
4 3
10
9 8
5 6
11 12
13 14
U60
DG405
8
7
11
U61B
5532-SOIC
R139
5.22K
H3
2
R140
5.36K
A
TP14
AGND
R370
100 1%
-BP
+15V
-15V
A_BPF
AHRDACOUT
A_HIRES
A
+5A
D2
6
+15V
A
C130
0.1uF
-15V
A
C309
0.1uF
+5A+15V
A-15V
16
15 14
U71B
DG412-D
1
2 3
13 12
5 4
U71A
DG412-D
2BP12
8
7 6
U71D
DG412-D
9
10 11
U71C
DG412-D
8
7
11
U68B
5532-SOIC
2BP[0..12]
2BP12
2BP[0..12]
R364
100K
+5A+15V
A-15V
A
A
R365
100K
B_BPF
A_BPF
AHRDACOUT
BHRDACOUT
G1
4
G4
4
R153
2.00K
C327
497PF
2BP0
2BP1
2BP2
2BP3
2BP4
2BP5
2BP6
2BP7
2BP8
2BP9
2BP10
2BP11
+15V
A
R148
5.22K
1
2
13
1
2
4
U68A
5532-SOIC
R154
2.00K
C328
65PF
+15V
+15V
-15V
A A
A
A
A
A
B12(LSB)
15
B11
14
B10
13
B9
12
B8
11
B7
10
B6
9
B5
8
B4
7
B3
6
B2
5
B1(MSB)
4
VREF
17
OUT1
1
OUT2
2
RFEEDBK
18
VD+
16
GND
3
U69
AD7541
C151
0.1uF
C310
22pF
C312
0.1uF
C311
0.1uF
1
2
13
1
2
4
U70A
5532-SOIC
2BP0
2BP1
2BP2
2BP3
2BP4
2BP5
2BP6
2BP7
2BP8
2BP9
2BP10
2BP11
A
R147
2.00K
8
7
11
U70B
5532-SOIC
C140
3900PF
1%
C313
0.1UF
1%
B12(LSB)
15
B11
14
B10
13
B9
12
B8
11
B7
10
B6
9
B5
8
B4
7
B3
6
B2
5
B1(MSB)
4
VREF
17
OUT1
1
OUT2
2
RFEEDBK
18
VD+
16
GND
3
U72
AD7541
+15V
-15V
A
A
A
A
+15V
AA
C152
0.1uF
C314
22pF
C141
0.1uF
C315
0.1uF
R146
2.00K
1
2
13
1
2
4
U73A
5532-SOIC
+15V
A
A
8
7
11
U73B
5532-SOIC
C146
3900PF
1%
C317
0.1UF
1%
C143
0.1uF
-15V
A
C316
0.1uF
B_HIRES
A
+5A
D5
6
-BP
+15V
-15V
B_BPF
15
16 1
4 3
10
9 8
5 6
11 12
13 14
U74
DG403
BHRDACOUT
TP16
BBPF
A
C145
10uF
R372
100 1%
A
R149
5.36K
C144
10uF
-15V
A
C142
0.1uF
B_BPF
H3
2
AM 700 TUNABLE BANDPASS FILTERS
PART OF A5 AUDIO GENERATOR BOARD
5
A TUNABLE BANDPASS FILTER
B TUNABLE BANDPASS FILTER
BYPASS
BYPASS
LOW–DISTORTION/BYPASS
SELECTOR
LOW–DISTORTION/BYPASS
SELECTOR
LOW–DISTORTION/BYPASS
SELECTOR