LM2904ADMR2 ONSEMI [ON Semiconductor], LM2904ADMR2 Datasheet - Page 9

• Manufacturer Part Number: LM2904ADMR2
• Description: Single Supply Dual Operational Amplifiers
• Manufacturer: ONSEMI [ON Semiconductor]

V
V
ref
ref
=
1
2
V
CC
1/2
LM358
+
−
f =
Triangle Wave
C
Figure 15. Function Generator
Output
4 CR
R1 + R
LM358, LM258, LM2904, LM2904A, LM2904V, NCV2904
f
R1
C
R
f
V
R1
ref
if,
75 k
R3
R3 =
R2 + R1
100 k
R2 R1
1/2
LM358
+
−
300 k
R2
http://onsemi.com
Square
Wave
Output
9
V
in
Figure 16. Multiple Feedback Bandpass Filter
For less than 10% error from operational amplifier.
Where f
If source impedance varies, filter may be preceded with voltage
follower buffer to stabilize filter parameters.
R1
Then:
Given:
Choose value f
o
and BW are expressed in Hz.
R2
C
R3 =
R1 =
R2 =
A(f
C
4Q
2 A(f
f
o
p f
o
) = gain at center frequency
R3
Q
= center frequency
2
R1 R3
o
o
, C
R1 −R3
C
o
)
R3
V
ref
1/2
LM358
−
+
V
CC
CO = 10 C
V
Q
BW
ref
o
CO
f
=
o
1
2
< 0.1
V
CC
V
O