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參數(shù)資料
| 型號： | AN-24 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | A Simplified Test Set for Op Amp Characterization |
| 中文描述： | 一種簡化的測試設(shè)置運(yùn)算放大器表征 |
| 文件頁數(shù)： | 6/10頁 |
| 文件大?。?/td> | 412K |
| 代理商： | AN-24 |
matched for on resistance within 200
X
Select for BV
GS
l
45V
FIGURE 7. Test Circuit
NOTE:
All resistors 1/4W, 5% unless specified otherwise
*
2N3819
TL/H/7190–7
CALIBRATION
Calibration of the test system is relatively simple and re-
quires only two adjustments. First, the output of the main
regulator is set up for 20V. Then, the triangular wave gener-
ator is adjusted to provide
g
5V output by selecting R
adj
.
This sets the horizontal sweep for the X-Y oscilloscope
used as the measurement system. The oscilloscope is then
set up for 1V/division vertical and for a full 10 division hori-
zontal sweep.
Scale factors for the three test positions are:
1. Bias Current Display
(Figure 2)
I
bias
total
Common Mode Voltage
100 nA/div. vertical
Variable horizontal
2. Offset Voltage-Offset Current
(Figure 3)
I
offset
V
offset
Common Mode Voltage
100 nA/div. vertical
1 mV/div. vertical
Variable horizontal
3.
Transfer Function (Figure 5)
V
IN
V
OUT
0.5 mV/div.
5V/div.
@
V
s
g
20V
5V/div.
@
V
s
g
15V
2V/div.
@
V
s
g
10V
1V/div.
@
V
s
g
5V
Gain
e
D
V
OUT
D
V
IN
CONSTRUCTION
Test set construction is simplified through the use of inte-
grated circuits and etched circuit layout.
Figure 8 gives photographs of the completed tester. Figure
9 shows the parts location for the components on the circuit
board layout of Figure 10. An attempt should be made to
6
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