Exam1 - Electronics I, ECE 2204, Fall 2006 Exam 1...

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Electronics I, ECE 2204, Fall 2006 Exam 1 Semiconductors and Diodes Use proper UNITS and ONLY 3 significant figures in all calculations. Show all work. NAME: _______________________________________ Signature: _____________________________________ By signing this exam, you agree that you have followed the Honor Code. 1. The I-V characteristics of a diode have a strong temperature dependence, as shown on the following page. For the circuit shown, calculate Voc and Isc, draw the load line, identify the three Q points at the three different temperatures (T = 200K, 300K, and 400K), and write the values for I D and V D in the table below. Voc = _________________ Isc = ___________________ Q point: I D V D at T = 200K at T = 300K at T = 400K
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2. A silicon wafer is doped with 6 x 10 18 cm -3 gallium atoms. a. Is the semiconductor n-type or p-type? b. What is the electron concentration at room temperature? c.
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Exam1 - Electronics I, ECE 2204, Fall 2006 Exam 1...

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