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LM324N View Datasheet(PDF) -

Part Name
Description
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LM324N
 
LM324N Datasheet PDF : 0 Pages
LM324, LM324A, LM224, LM2902, LM2902V, NCV2902
Vref =
1
2
VCC
Vref
Triangle Wave
Output
+
1/4
LM324
-
C
R3
75 k
R1
100 k
Vref
R2
300 k
+
1/4
LM324
-
Rf
f = R1 + RC
4 CRf R1
if R3 = R2 R1
R2 + R1
Figure 15. Function Generator
Square
Wave
Output
R1
Vin
CC
R2
VCC
R3
-
1/4
LM324
+
CO
VO
CO = 10 C
Vref
1
Vref = 2 VCC
Figure 16. Multiple Feedback Bandpass Filter
Given:ąfoă=ăcenter frequency
A(fo)ă=ăgain at center frequency
Choose value fo, C
Then:
R3 =
Q
π fo C
R1 =
R3
2 A(fo)
R2 =
R1 R3
4Q2 R1 - R3
For less than 10% error from operational amplifier,
Qo fo
BW
< 0.1
where fo and BW are expressed in Hz.
If source impedance varies, filter may be preceded with
voltage follower buffer to stabilize filter parameters.
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