Typical Single - Supply Applications
Figure 20. Activer bandpass filter
LM124-LM224-LM324
Figure 21. High input Z, DC differential
amplifier
For R-----1-- = R-----4--
R2 R3
(CMRR depends on this resistor ratio match)
Fo = 1kHz
Q = 50
Av = 100 (40dB)
Figure 22. Using symmetrical amplifiers to
reduce input current (general
concept)
e0
⎛
⎝
1
+
RR-----43--⎠⎞
(e2 - e1)
As shown e0 = (e2 - e1)
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