參數(shù)資料
型號: LM258D
廠商: MOTOROLA INC
元件分類: 運(yùn)動控制電子
英文描述: DUAL DIFFERENTIAL INPUT OPERATIONAL AMPLIFIERS
中文描述: DUAL OP-AMP, 5000 uV OFFSET-MAX, 1 MHz BAND WIDTH, PDSO8
封裝: PLASTIC, SO-8
文件頁數(shù): 9/16頁
文件大?。?/td> 128K
代理商: LM258D
LM358, LM258, LM2904, LM2904A, LM2904V, NCV2904
http://onsemi.com
9
2
1
V
ref
=
V
CC
1
2
Figure 15. Function Generator
Figure 16. Multiple Feedback Bandpass Filter
For less than 10% error from operational amplifier.
If source impedance varies, filter may be preceded with voltage
follower buffer to stabilize filter parameters.
Where f
o
and BW are expressed in Hz.
Q
o
f
o
BW
< 0.1
Given:
f
o
= center frequency
A(f
o
) = gain at center frequency
Choose value f
o
, C
Then:
R3 =
Q
π
f
o
C
R3
R1 =2 A(f
o
)
R1 R3
4Q
2
R1 -R3
R2 =
+
1/2
LM358
-
+
-
-
+
V
ref
=
V
CC
V
ref
f =
R1 + R
C
4 CR
f
R1
R3 =
R2 R1
R2 + R1
R2
300 k
75 k
R1
R3
C
Triangle Wave
Output
Square
Wave
Output
V
CC
R3
R1
R2
V
ref
V
in
C
C
V
O
CO
CO = 10 C
R
f
if,
V
ref
1/2
LM358
1/2
LM358
100 k
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