LM2903W Datasheet, PDF (8/13 Pages) STMicroelectronics – Low-power dual voltage comparator

Typical application schematics
Figure 19. Time delay generator
V_{C C} = +15 V
LM2903W
10 kΩ 15 kΩ
200 kΩ
10 kΩ
V₃
10 MΩ
1/2
LM2903
V_CC
0t
o
t
A
Input gating signal
V_CC
10 kΩ
V_(ref.)
V3
V_{C1 V2}
V1
0
t
t₀ t₁ t₂ t₃
t₄
51 kΩ
1/2
V_C1
LM2903
10 kΩ
V₂
0.001 μF
10 MΩ
1/2
LM2903
51 kΩ
V₁
51 kΩ
10 kΩ
10 MΩ
1/2
LM2903
3 kΩ
V₀₃ ^VCC
t
o
t₃
3 kΩ
V_O2 ^VCC
t
o
t
2
3 kΩ
V
O1
V_CC
tt
01
Figure 20. Two-decade high-frequency VCO
V_CC
100 kΩ
Frequency control
voltage input
Vcontrol
100 kΩ
10 kΩ
0.1 μF
500 pF
1/ 2
LM2903
3 kΩ
5.1 kΩ
0.01 μF
1/ 2
LM2903
50 kΩ
20 kΩ
20 kΩ
V_{CC /2}
V_CC = + 30 V
+250 mV ^{Vcontrol +50 V}
700 Hz fo 100 kHz
1/ 2
LM2903
V_CC /2
V_CC
3 kΩ
Output 1
Output 2
8/13
Doc ID 022662 Rev 1