LM124W STMicroelectronics, LM124W Datasheet - Page 10

• Manufacturer Part Number: LM124W
• Description: Low Power Quad Operational Amplifiers
• Manufacturer: STMicroelectronics

Typical Single - Supply Applications
10/16
Figure 20. Activer bandpass filter
Figure 22. Using symmetrical amplifiers to
e
1
Fo = 1kHz
Q = 50
Av = 100 (40dB)
1.5MW
10k W
R3
e
I
I
I
B
B
I
reduce input current (general
concept)
I
LM124W
1/4
100k W
2N 929
LM124W
R1
I
B
1/4
10MW
R4
LM124W
3MW
330pF
1/4
I
I
C2
B
B
0.001 m F
470kW
100kW
R6
R8
LM124W
1/4
Aux. amplifier for input
current compensation
330pF
C1
LM124W
e
1/4
o
10 m F
C3
470kW
100kW
R5
R7
V
e
O
CC
Figure 21. High input Z, DC differential
+V1
+V2
e
As shown e
For
(CMRR depends on this resistor ratio match)
100kW
0
R1
⎛
⎝
1
R
-------
R
1
2
+
amplifier
R
-------
R 3
=
4
R
------ -
R
⎞
⎠
0
4
3
= (e
(e
LM124W
2
2
100kW
1/4
- e
- e
LM124W-LM224W-LM324W
R2
1
1
)
)
100kW
R3
LM124W
100kW
1/4
R4
V
o