ELEC 3509 Midterm: Exam-ELEC3509-2009December
Document Summary
Department name & course number: electronics elec 3509 a. Students must count the number of pages in this examination question paper before beginning to write, and report any discrepancy immediately to a proctor. This examination question paper may be taken from the examination room. Unless otherwise specified, use only the simplified transistor model for the bjt, i. e. , take rx=0, ro= , and r = . The average of a half sine wave with amplitude of 1 is 1/ . Choose the best answer for each of the following questions: 2 marks (a) a transistor has re=25 and ro=80k . Find its early voltage, assum- ing a large : 100v, -60v, 80v, 120v. 2 marks (b) which statement is not true for cc amplifier: low voltage gain, high input resistance iii. High current gain v. none of the above (c) transfer function of a 2nd order low pass filter. What are the values of ho, q and o respec-
