Δ
I
O
Δ
I
F
– SMALL SIGNAL CURRENT TRANSFER RATIO
0.30
T
A
= 25°C, R
L
= 100
Ω,
V
CC
= 5 V
0.20
0.10
0
0
4
8
12
16
20
24
I
F
– QUIESCENT INPUT CURRENT – mA
Figure 7. Small-signal current transfer ratio vs.
quiescent input current.
0
NORMALIZED RESPONSE –dB
-5
-10
-15
-20
-25
T
A
= 25 C
I
F
= 16 mA
R
L
= 100
Ω
R
L
= 220
Ω
R
L
= 470
Ω
R
L
= 1 kΩ
+5 V
SET I
F
AC INPUT
0.1 μF
560
Ω
1
20 kΩ
2N3053
8
7
6
0.1 μF
5
R
L
+5 V
2
3
4
100
Ω
V
O
-30
0.01
1.6 V dc
0.25 Vp-p ac
0.1
1.0
10
f – FREQUENCY – MHz
Figure 8. Frequency response.
I
F
0
V
O
1.5 V
5V
PULSE
GEN.
Z
O
= 50
Ω
t
r
= 5 ns
I
F
1
2
8
7
6
0.1μF
4
R
M
5
C
L
= 1.5 pF
R
L
V
O
+5 V
10% DUTY CYCLE
1/f < 100 μs
3
1.5 V
V
OL
I
F
MONITOR
t
PHL
t
PLH
Figure
9.
Switching test circuit.
13