OP177
BASIC CURRENT SOURCE
R
3
1kΩ
R
1
100kΩ
R
2
100kΩ
100mA CURRENT SOURCE
R
3
+15V
2
3
V
IN
–
OP177
+
R
4
990Ω
6
R
5
10Ω
I
OUT
≤
15mA
V
IN
R
1
R
2
2
3
–
OP177
+
R
4
6 50Ω
2N2222
2N2907
–15V
R
5
I
OUT
≤
100mA
00289-029
I
OUT
= V
IN
R
3
R
1
× R
5
GIVEN R
3
= R
4
+ R
5
, R
1
= R
2
Figure 29. Bilateral Current Source
1kΩ
+15V
+15V
0.1µF
C
1
30pF
D
1
1N4148
0.1µF
7
6
V
OUT
0 < V
OUT
< 10V
0.1µF
1kΩ
2
3
–
+
7
6
2N4393
R
3
2kΩ
2
3
–
+
OP177
4
OP177
V
IN
4 0.1µF
–15V
–15V
Figure 30. Precision Absolute Value Amplifier
1kΩ
+15V
0.1µF
7
6
1N4148
NC
2
2N930
1kΩ
C
H
7
+15V
0.1µF
2
1kΩ
3
–
+
OP177
4
0.1µF
V
IN
–
AD820
3
+
4
6
V
OUT
0.1µF
–15V
RESET
1kΩ
–15V
Figure 31. Precision Positive Peak Detector
Rev. E | Page 11 of 16
00289-031
00289-030
AD [ ANALOG DEVICES ]
