Question

Problem-Solving Session 3: Operational Amplifiers Choose values of the unspecified resistors in the circuit of figure pss3-1 so that the voltage gain for $V_1$ is adjustable from 0 to 20 and the voltage gain for $V_2$ is adjustable from 0 to 40. Use standard 5% resistor values. The nominal voltage gains, before taking into account resistor tolerances, should be within 10% of the desired values. Assume that the op amps are ideal. +\\ $V_1$\ 5?? $V_2$ + 5?? $R_A$ $R_B$ +5V $R_C$ $OA_1$ + -5V $R_D$ $R_E$ +5V $R_F$ $OA_2$ + -5V $R_G$ +5V $OA_3$ $V_{out}$ + -5V Figure pss3-1. Circuit involving three op amps and two potentiometers for gain adjustment.

          Problem-Solving Session 3: Operational Amplifiers
Choose values of the unspecified resistors in the circuit of figure pss3-1 so that the
voltage gain for $V_1$ is adjustable from 0 to 20 and the voltage gain for $V_2$ is
adjustable from 0 to 40. Use standard 5% resistor values. The nominal voltage
gains, before taking into account resistor tolerances, should be within 10% of the
desired values. Assume that the op amps are ideal.
+\\
$V_1$\
5??
$V_2$
+
5??
$R_A$
$R_B$
+5V
$R_C$
$OA_1$
+
-5V
$R_D$
$R_E$
+5V
$R_F$
$OA_2$
+
-5V
$R_G$
+5V
$OA_3$
$V_{out}$
+
-5V
Figure pss3-1. Circuit involving three op amps and two potentiometers for gain adjustment.

Problem-Solving Session 3: Operational Amplifiers
Choose values of the unspecified resistors in the circuit of figure pss3-1 so that the
voltage gain for V1 is adjustable from 0 to 20 and the voltage gain for V2 is
adjustable from 0 to 40. Use standard 5% resistor values. The nominal voltage
gains, before taking into account resistor tolerances, should be within 10% of the
desired values. Assume that the op amps are ideal.
+

V15??
V2
+
5??
RA
RB
+5V
RC
OA1
+
-5V
RD
RE
+5V
RF
OA2
+
-5V
RG
+5V
OA3
Vout
+
-5V
Figure pss3-1. Circuit involving three op amps and two potentiometers for gain adjustment.

Added by Susan P.

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