www.ti.com
TL494
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS074E – JANUARY 1983 – REVISED FEBRUARY 2005
PARAMETER MEASUREMENT INFORMATION
Amplifier Under Test
+
V
I
−
FEEDBACK
+
V
ref
−
Other Amplifier
Figure 2. Amplifier Characteristics
15 V
68
Ω
2W
Output
C
L
= 15 pF
(See Note A)
10%
TEST CIRCUIT
NOTE A: C
L
includes probe and jig capacitance.
90%
Each Output
Circuit
t
f
t
r
90%
10%
OUTPUT VOLTAGE WAVEFORM
Figure 3. Common-Emitter Configuration
15 V
Each Output
Circuit
Output
68
Ω
2W
10%
t
r
TEST CIRCUIT
NOTE A: C
L
includes probe and jig capacitance.
90%
90%
C
L
= 15 pF
(See Note A)
10%
t
f
OUTPUT VOLTAGE WAVEFORM
Figure 4. Emitter-Follower Configuration
7