LM2903
Figure 20. Time delay generator
V
C
C
= +15 V
Typical application schematics
10 kΩ 15 kΩ
200 kΩ
10 MΩ
10 kΩ
1/2
LM2903
3
kΩ
V
3
V
03
V
CC
t
o
t
3
3
kΩ
10 kΩ
V
CC
0
1/2
LM2903
51 kΩ
V
C1
V
2
0.001
μ
F
10 kΩ
10 MΩ
t
o
t
A
1/2
LM2903
V
O2
V
CC
V
(ref.)
t
o
3
kΩ
t
2
Input gating
signal
V
CC
10 MΩ
51 kΩ
10 kΩ
1/2
LM2903
V
3
V
C1
V
2
V
1
0
t
0
t
1
t
2
t
3
V
O1
V
CC
V
1
t
t
4
51 kΩ
t
0
t
1
Figure 21. Two-decade high-frequency VCO
V
CC
100 kΩ
V
CC
100 kΩ
Frequency control
voltage input
Vcontrol
500 pF
10 kΩ
0.1
μF
20 kΩ
1/ 2
LM2903
3
kΩ
5.1 kΩ
0.01
μF
V
CC
/2
1/ 2
LM2903
3
kΩ
Output 1
Output 2
20 kΩ
V
CC
/2
50 kΩ
1/ 2
LM2903
V
CC
= +
30
V
Vcontrol +50 V
+250 mV
700 Hz
fo 100 kHz
Doc ID 2470 Rev 10
9/18