Op Amps for Everyone - The Repeater Builder's Technical ...

Simultaneous Equations
|b| V CC
R F
R G1
5 R F
R G2
1
R G2
R F
0.2 20 100 k
0.2
(4–63)
(4–64)
The final equation for this example is given in Equation 4–63.
V OUT
–20V IN
1
(4–65)
The final circuit is shown in Figure 4–20 and the measured transfer curve for this circuit
is shown in Figure 4–21.
R F
20 kΩ
V IN
+5V
R G2A
51 kΩ
R G1
1 kΩ
RG2B
51 kΩ
_
+
+5V
0.01 µF
V OUT
R L
10 kΩ
0.01 µF
D1
Figure 4–20. Case 4 Example Circuit
4-20