Diodes Si diodes will be considered. Which of the following is wrong I. D3 diode blocking. II. Diode D3 is on. III. Diode D4 is conducting. IV. Diode D4 is in blocking.

a) What is n-type semiconductor materials? What are the majority and the minority cariers? b) What is p-type semiconductor materials? What are the majority and the minority cariers? c) What is depletion region of a p-n junction diode? d) Describe in your own words the forward-bias and reverse- bias conditions of a p-n junction diode. e) Draw a Diode Symbol and label the anode and the cathode. Si Ge 2 ka f) Find V, in the circuit shown in +20 V 2 k2 15V Fig. Fuad Al-Mannai EENG261 Page 1

Determine the reverse voltage and reverse current for the diode in the Figure below  for each of the diode models. Also find the voltage across the limiting resistor in each case. Assume IR = 1-µA. a. The value of reverse current, assuming ideal diode model. b. The value of reverse voltage, assuming ideal diode model. c. The value of voltage across the limiting resistor, assuming ideal diode model. d. The value of reverse current, assuming practical diode model. e. The value of reverse voltage, assuming practical diode model. f. The value of voltage across the limiting resistor, assuming practical diode model. g. The value of reverse current, assuming complete diode model. (in µA) h. The value of reverse voltage, assuming complete diode model. (in mV) i. The value of voltage across the limiting resistor, assuming complete diode model. (in V)