LM124-LM224-LM324
TYPICAL SINGLE - SUPPLY APPLICATIONS
NON-INVERTING DC GAIN
DC SUMMING AMPLIFIER
e
1
100k
Ω
A
V
= 1 + R2
R1
10k
Ω
1/4
LM124
e
O
+5V
(As shown A
V
= 101)
100k
Ω
e
2
e
3
100k
Ω
100k
Ω
1/4
LM124
e
O
R2
1M
Ω
R1
10k
Ω
(V)
100k
Ω
e
4
0
e
I
(mV)
e
O
100k
Ω
e
0
= e
1
+e
2
-e
3
-e
4
Where (e
1
+e
2
)
≥
(e
3
+e
4
)
to keep e
0
≥
0V
HIGH INPUT Z ADJUSTABLE GAIN DC
INSTRUMENTATION AMPLIFIER
R1
100k
Ω
LOW DRIFT PEAK DETECTOR
e
1
1/4
LM124
R3
100k
Ω
R4
100k
Ω
I
B
1/4
LM124
R2
2k
Ω
Gain adjust
e
O
1/4
LM124
I
B
1
µ
F
1/4
LM124
e
o
R5
100k
Ω
e
I
C
*
2I
B
2N 929
Z
o
0.001
µ
F
Z
I
R6
100k
Ω
R7
100k
Ω
2I
B
R
1M
Ω
1/4
LM124
e
2
I
B
3R
3M
Ω
1/4
LM124
I
B
Input current
compensation
if
R1 = R5 and R3 = R4 = R6 = R7
2R 1
-
e
0
= 1 + ----------
R2
(e
2
-e
1
)
* Polycarbonate or polyethylene
As shown e
0
= 101 (e
2
- e
1
).
8/13
ETC [ ETC ]
