Midterm 2 March 2009

# Midterm 2 March 2009 - ECSE 330 INTRODUCTION TO ELECTRONICS...

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ECSE 330: I NTRODUCTION TO E LECTRONICS Midterm Examination #2 March 26 th 2009, 8:35AM –9:55 AM Instructor: Joshua D. Schwartz Please note the following before you begin: - This is a closed book examination, no notes permitted. - This exam is 7 pages (including cover and formula sheets) and consists of 4 problems totaling 36 possible points. - Only the faculty standard calculator is permitted. - Write all answers in the answer booklet only. This paper will NOT be collected. - Good luck!

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2 Question 1 – (6 points) In the following multistage circuit, β =100 for all transistors. You may assume |V BE | = 0.7V and |V CE(sat) | = 0.2V i. [2 pts] Find the equivalent Thévenin network for Q1’s base-biasing arrangement. ii. [4 pts] Calculate the DC collector currents for both transistors and the DC value of the output voltage (V out ). Q 1 Q 2 V DD =10V V out 10V 10V R b1 =2.7k R b2 =7.3k R c1 = 1k R e1 = 1k R c2 =4.5k
3 Question 2 – (12 points) Consider the following BJT circuit. You may assume that all BJTs are in the active mode and have β =100, V A =50, and

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Midterm 2 March 2009 - ECSE 330 INTRODUCTION TO ELECTRONICS...

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