LM124 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'LM124' PDF : 14 Pages View PDF
LM124 - LM224 - LM324
TYPICAL SINGLE - SUPPLY APPLICATIONS
ACTIVER BANDPASS FILTER
HIGH INPUT Z, DC DIFFERENTIAL AMPLIFIER
e1
R3
10kΩ
R1
1 00k Ω
1/4
LM124
R4
10MΩ
C2
330pF
R6
470k Ω
1/4
LM124
R8
100kΩ
C1
330pF
1/4
LM124
R5
470k Ω
C3
10µF
R7
100kΩ
eO
V CC
FO = 1kHz
Q = 50
AV = 100 (40dB)
VOLTAGE GAIN AND PHASE vs FREQUENCY
For
R1
R2
=
R4
R3
(CMRR depends on this resistor ratio match)
R2
100kΩ
R4
100kΩ
R1
100kΩ
R3
1/4
100kΩ
LM124
+V1
1/4
LM124
Vo
+V2
eo
(1+
R4
R3
)
(e2−
e1)
As shown eo = (e2 - e1)
10/14
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