In a useful application, the amplifier drives a load. The circuit in Fig. P4.18 models thi...

In a useful application, the amplifier drives a load. The circuit in Fig. P4.18 models this scenario.

(a) Sketch the gain Vo/VS for 10 Ω ≤ RL ≤ ∞.

(b) Sketch Io for 10 Ω ≤ RL ≤ ∞ if VS = 0.1 V.

(c) Repeat (b) if VS = 1.0 V.

(d) What is the minimum value of RL if |Io| must be less than 100 mA for |VS|<0.5 V?

(e) What is the current IS if RL is 100 Ω? Repeat for RL = 10 kΩ.

Figure P4.18