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oldfinal - Last(sur)name 18-220 Spring 2007 FINAL EXAM A...

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A 1 18-220 Spring 2007 ________________________________________________________________________ FINAL EXAM ________________________________________________________________________ Last (sur)name: _____________________ First (given) name: _______________________ Lab Section: _____ 1. __________ 2. __________ 3. __________ 4. __________ 5. __________ 6. __________ 7. __________ 8. __________ Total __________ Closed book, no computers, no calculators, no cell phones. Answers should be numerical if that is possible given the problem statement. Intermediate steps and/ or justification for results must be included. Circle or box your final answers. There are 8 problems and 12 pages. Read all problems first and plan ahead to use your time effectively. The equation sheet is the last page of the text. It can be detached and need not be handed in.

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Last (sur)name: _____________________ A 2 (3 points) 0. Extra credit question. All or nothing (all must be right or no credit). a) The signal shown below is ____ DSB ____ AM ____ USB ____ LSB ) ( ω E C m C + m C b) The output from the block diagram below is ____ a detected AM signal ____ a detected USB signal ____ a detected LSB signal ____ a modulated AM signal ____ a modulated DSB signal ____ a modulated FM signal ____ a modulated LSB signal ) ( t f c ) ( t e c) The circuit below is useful for detection (demodulation) of ____ AM ____ FM ____ DSB ____ DSB, USB, and LSB R ) ( t v S R v + + D v C +
Last (sur)name: _____________________ A 3 (15 points) 1. Fill in the blanks in the Fourier series representation of the function below. ) ( t v t V 2 + 4 T 4 T 2 T 2 T 4 / T V 2 v ( t ) = ________ + ________ cos(2 π t / T ) + ________ cos(4 t / T ) + ________ cos(6 t / T ) + ________ cos(8 t / T ) +. .. + ________ sin(2 t / T ) + ________ sin(4 t / T ) + ________ sin(6 t / T ) + ________ sin(8 t / T ) + . ..

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Last (sur)name: _____________________ A 4 (12 points) 2. A circuit has the transfer function 2 4 ) 10 / 1 )( 10 / 1 ( ) 10 / ( ) ( ω j j j j H + + = Make a Bode plot of the transfer function on the axes below. (Note that there is a squared term in the
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oldfinal - Last(sur)name 18-220 Spring 2007 FINAL EXAM A...

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