Datasheet

LM139, LM239, LM339 Typical applications
Doc ID 2159 Rev 3 9/19
Figure 14. Time delay generator
Figure 17. Two-decade high-frequency VCO
V
CC
0
V
(ref.)
10 kΩ
1/4
15 kΩ 200 k Ω
3 kΩ
3k
Ω
3 k Ω
10 MΩ
V
O2
V
03
O1
V
51 kΩ
V
1
V
2
0.001
μ
F
V
C1
V
3
V
CC
V
C1
V
1
V
2
V
3
0
0
1
t
t
3
t
4
t
2
t
t
V
CC
t
0
t
1
V
CC
V
CC
V
C C
=+15V
1/4
LM139
1/4
1/4
LM139
LM139
LM139
10 kΩ
10 kΩ
10 kΩ
10 kΩ
10 MΩ
10 MΩ
51 kΩ
51 kΩ
t
2
t
o
t
3
t
o
t
A
t
o
Input gating signal
Figure 15. Low frequency op amp with offset
adjust
Figure 16. Zero crossing detector (single
power supply)
e
l
~
2N 2222
5 V
e
o
R1
100 kΩ
1 kΩ
5 V
1 MΩ
100 kΩ
1 MΩ
Offset adjust
R
S
R
1
15 kΩ
0.5
μ
F
R
2
1/ 4
LM139
100 kΩ
10 kΩ
e
l
20 MΩ
5 V
1N4148
5.1 kΩ
5.1 kΩ
100 kΩ
1/ 4
LM139
5.1 kΩ
V
CC
V
CC
100 kΩ
3 kΩ
5.1 kΩ
/2
V
CC
/2
0.01 μF
500 pF
100 kΩ
0.1 μF
20 kΩ
50 kΩ
=+30V
+250 mV
V
control
+50 V
700 Hz f 100 kHz
o
20 kΩ
3 kΩ
1/ 4
LM139
1/ 4
LM139
1/ 4
LM139
Output 1
Output 2
V
CC
V
CC
Frequency control
voltage input
Vcontrol