Assume that the op amp in the circuit in Fig. P5.20 is ideal.
a. Find the output voltage vo when the variable resistor is set to 60kΩ.
b. How large can Rx be before the amplifier saturates?
63 kΩ
4.5 kΩ
15 kΩ
400 mV
vo
Ans (a) vo = 4.8V, (b) Rx = 75kΩ