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參數(shù)資料
| 型號： | MF10AJ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | Universal Monolithic Dual Switched Capacitor Filter |
| 中文描述： | DUAL SWITCHED CAPACITOR FILTER, RESISTOR PROGRAMMABLE, UNIVERSAL, CDIP20 |
| 封裝： | 0.300 INCH, CERAMIC, DIP-20 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大?。?/td> | 405K |
| 代理商： | MF10AJ |
3.0 Applications Information
(Continued)
to 1 by choosing R
4A
such that: R
4A
e b
H
OLPA
R
1A
e
R
1A
e
20k. If the 50/100/CL pin is connected to mid-sup-
ply for nominal 100:1 clock-to-center-frequency ratio, we
find R
2A
by:
f
0A2
(f
CLK
/100)
2
e
2
c
10
4
c
(529)
2
R
3A
e
Q
A
0
R
2A
R
4A
e
0.785
0
5.6
c
10
3
c
2
c
10
4
e
8.3k
R
2A
e
R
4A
(1000)
2
e
5.6k and
The resistors for the second section are found in a similar
fashion:
R
1B
e
20k
R
4B
e
R
1B
e
20k
f
0B2
(f
CLK
/100)
2
e
20k
R
3B
e
Q
B
0
R
2B
R
4B
e
3.559
0
1.97
c
10
4
c
2
c
10
4
e
70.6k
The complete circuit is shown in Figure 16 for split
g
5V
power supplies. Supply bypass capacitors are highly recom-
mended.
R
2B
e
R
4B
(993)
2
(1000)
2
e
19.7k
TL/H/10399–25
FIGURE 16. Fourth-Order Chebyshev Low-Pass Filter from Example in 3.1.
g
5V Power Supply. 0V–5V TTL or
b
5V
g
5V CMOS Logic Levels.
TL/H/10399–26
FIGURE 17. Fourth-Order Chebyshev Low-Pass Filter from Example in 3.1.
Single
a
10V Power Supply. 0V–5V TTL Logic Levels. Input Signals
Should be Referred to Half-Supply or Applied through a Coupling Capacitor.
14
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