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LM2904A Scheda tecnica(PDF) 9 Page - ON Semiconductor

Il numero della parte LM2904A
Spiegazioni elettronici  Single Supply Dual Operational Amplifiers
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Produttore elettronici  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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LM2904A Scheda tecnica(HTML) 9 Page - ON Semiconductor

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LM258, LM358, LM358A, LM2904, LM2904A, LM2904V, NCV2904
http://onsemi.com
9
2
1
Vref =VCC
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 fo and BW are expressed in Hz.
Qo fo
BW
< 0.1
Given:
fo = center frequency
A(fo) = gain at center frequency
Choose value fo, C
Then:
R3 =
Q
p fo C
R3
R1 =
2 A(fo)
R1 R3
4Q2 R1 −R3
R2 =
+
+
+
Vref =VCC
Vref
f =
R1 + RC
4 CRf R1
R3 =
R2 R1
R2 + R1
R2
300 k
75 k
R3
R1
C
Triangle Wave
Output
Square
Wave
Output
VCC
R3
R1
R2
Vref
Vin
C
C
VO
CO
CO = 10 C
Rf
if,
1/2
LM358
Vref
1/2
LM358
1/2
LM358
100 k


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