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LM339QT 数据表(PDF) 9 Page - STMicroelectronics

部件名 LM339QT
功能描述  Low-power quad voltage comparators
PDF  19 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

LM339QT 数据表(HTML) 9 Page - STMicroelectronics

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LM139, LM239, LM339
Typical applications
Doc ID 2159 Rev 3
9/19
Figure 14.
Time delay generator
Figure 17.
Two-decade high-frequency VCO
VCC
0
V(ref.)
10 k
Ω
1/4
15 k
Ω
200 k
Ω
3 k
Ω
3kΩ
3 k
Ω
10 M
Ω
V
O2
V
03
O1
V
51 k
Ω
V1
V2
0.001
μF
V
C1
V3
VCC
V
C1
V1
V2
V3
0
0
1
t t
3
t
4
t
2
t
t
VCC
t
0
t
1
VCC
VCC
VC C =+15V
1/4
LM139
1/4
1
/4
LM139
LM139
LM139
10 k
Ω
10 k
Ω
10 k
Ω
10 k
Ω
10 M
Ω
10 M
Ω
51 k
Ω
51 k
Ω
t
2
t
o
t
3
t
o
t
A
t
o
Input gating signal
Figure 15.
Low frequency op amp with offset
adjust
Figure 16.
Zero crossing detector (single
power supply)
e
l
~
2N 2222
5 V
e
o
R1
100 k
Ω
1 k
Ω
5 V
1 M
Ω
100 k
Ω
1 M
Ω
Offset adjust
R
S
R
1
15 k
Ω
0.5
μF
R
2
1/ 4
LM139
100 k
Ω
10 k
Ω
e
l
20 M
Ω
5 V
1N4148
5.1 k
Ω
5.1 k
Ω
100 k
Ω
1/ 4
LM139
5.1 k
Ω
V
CC
V
CC
100 k
Ω
3 k
Ω
5.1 k
Ω
/2
V
CC
/2
0.01
μF
500 pF
100 k
Ω
0.1
μF
20 k
Ω
50 k
Ω
=+ 30V
+250 mV
Vcontrol +50 V
700 Hz
f
100 kHz
o
20 k
Ω
3 k
Ω
1/ 4
LM139
1/ 4
LM139
1/ 4
LM139
Output 1
Output 2
V
CC
V
CC
Frequency control
voltage input
Vcontrol



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