Chapter 1, Problem 1.15TYU

Consider the circuit shown in Figure 1.46. The diode can be either a pn junction diode or a Schottky diode. Assume the cut−in voltages are $V_{\gamma }=0.7\text{V}$ and $V_{\gamma }=0.3\text{V}$ for the pn junction diode and Schottky diode, respectively. Let $r_f=0$ for both diodes. Calculate the current ID when each diode is inserted in the circuit. (Ans. pn diode, 0.825 mA; Schottky diode, 0.925 mA).

Figure 1.46 Circuit for exercise problem TYU 1.15. The diode can be cither a pn junction diode or a Schottky diode.