RF
6
100kΩ
9
2
10
RA
D
M
14
D
+
15
A2
VOUT
–
13
2MΩ
≈ 500V
11
A1
17
16
RC
12
7
+
–
4
VIN
500mV
=
1
VS
+
–
3
15V
O/P PWR
0.47µF
19
1000V
+
Pulse GEN
20
15V
RS
=
–
≈ 500V
10Ω
VOUT = [VIN ( 500V/1MR)] [ 1 + (RF/RA)] RA + RF = 2MΩ
I/P PWR
FIGURE 12. Series Source.
100kΩ
9
2
10
D
M
6
14
D
+
15
A2
R1
13
R2
VOUT
11
A1
17
7
16
12
OPA177
–
+
4
VIN
1
+
–
3
15V
–
O/P PWR
0.47µF
19
+
–
0.47µF
Pulse GEN
20
15V
0.47µF
I/P PWR
VOUT = [1 + (R1/R2)] VIN
FIGURE 13. Isolator for Low-Level Signals.
®
16
3656