4.38 Consider the circuit in Fig. 4.10 with VDD = 3 V and R = 3 kΩ.
(a) Find the current using a constant-voltage-drop model.
(b) What value of IS is required to make this solution exact?
(c) Approximately how much will the current change from this value if IS increases by a factor of 100?
(a) 0.767 mA; (b) 5.3 × 10−16 A; (c) 0.805 mA