ExamII_f09 - EE 350 EXAM II 15 October 2009 Last Name(Print First Name(Print ID number(Last 4 digits Section DO NOT TURN THIS PAGE UNTIL YOU ARE

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EE 350 EXAM II 15 October 2009 Last Name (Print): First Name (Print): ID number (Last 4 digits): Section: DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO Problem Weight Score 1 25 2 25 3 25 4 25 Total 100 Test Form A INSTRUCTIONS 1. You have 2 hours to complete this exam. 2. This is a closed book exam. You may use one 8.5” × 11” note sheet. 3. Calculators are not allowed. 4. Solve each part of the problem in the space following the question. If you need more space, continue your solution on the reverse side labeling the page with the question number; for example, Problem 1.2 Continued . NO credit will be given to solutions that do not meet this requirement. 5. DO NOT REMOVE ANY PAGES FROM THIS EXAM. Loose papers will not be accepted and a grade of ZERO will be assigned. 6. The quality of your analysis and evaluation is as important as your answers. Your reasoning must be precise and clear; your complete English sentences should convey what you are doing. To receive credit, you must show your work. 1
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Problem 1: (25 Points) 1. (8 points) A Linear time-invariant system with input f ( t ) and output y ( t ) has the impulse response represen- tation h ( t )= ± e - 3 t - e - 4 t ² u ( t +1) . (a) (4 points) Is the LTI system causal or noncausal? Explain your answer in one or two sentences. (b) (4 points) Is the LTI system BIBO stable? Justify your answer. 2
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2. (9 points) The system in Figure 1 with input f ( t ) and output y ( t ) is comprised of three LTI subsystems whose impulse response representations are h 1 ( t ), h 2 ( t ), and h 3 ( t ). It is desired to represent the composite signal by a single impulse response function h ( t ) such that y ( t )= f ( t ) * h ( t ) .
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This note was uploaded on 02/25/2012 for the course E E 350 at Pennsylvania State University, University Park.

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ExamII_f09 - EE 350 EXAM II 15 October 2009 Last Name(Print First Name(Print ID number(Last 4 digits Section DO NOT TURN THIS PAGE UNTIL YOU ARE

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