Ex_2_F07 - University of Florida Department of Electrical...

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University of Florida EEL 3701—Fall 2007 Drs. Lam,, Schwartz, and Arroyo Department of Electrical & Computer Engineering Exam 2 Thursday, 8 Nov 2007 Page 1/ 10 , ________________ Last Name , First Name Instructions: Turn off all cell phones , beepers and other noise making devices . Show all work on the front of the test papers. Box each answer. If you need more room, make a clearly indicated note on the front of the page, "MORE ON BACK", and use the back. The back of the page will not be graded without an indication on the front. You may not use any notes, HW, labs, other books, or calculators. This exam counts for 24% of your total grade. Read each question carefully and follow the instructions . You must pledge and sign this page in order for a grade to be assigned. Put your name at the top of this test page and be sure your exam consists of 10 distinct pages. Sign your name and add the date below. Boolean expression answers must be in lexical order , i.e., /A before A, A before B, & D 3 before D 2 ). Label the inputs and outputs of each circuit with activation-levels. The point values for problems may be changed at prof’s discretion. Notation reminder: A(H) is the same as A.H. Always optimize your answer. The best answer gets the most points. PLEDGE: On my honor as a University of Florida student, I certify that I have neither given nor received any aid on this examination, nor have I seen anyone else do so. SIGN YOUR NAME DATE ( 8 Nov 2007 ) Probs Available Points 1 15 2 13 3 16 4 17 5 18 6 15 7 6 TOTAL 100 Regrade comments below. Give page # and problem # and reason for the petition. Good Evening! Welcome to Exam 2. Good luck & Go Gators! Please read carefully.
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University of Florida EEL 3701—Fall 2007 Drs. Lam, Schwartz and Arroyo Department of Electrical & Computer Engineering Exam 2 Thursday, 8 Nov 2007 Page 2/ 10 , ____________ Last Name , First Name E M Q + 0 0 /Q 0 1 0 1 0 1 1 1 Q Q 1 Q 0 Q 1 + Q 0 + E 1 M 1 T 0 0 0 0 1 1 0 1 1 10 01 00 11 Q 1 Q 0 Start TQ Q CLR SET EQ Q CLR SET M [15%] 1. Design a system that counts as shown. The system must asynchronously change to state “ 10 ” when Start (active-low) goes true. Use the EM flip-flop (defined below) for the most significant bit of the counter and a T-FF for the least significant bit. Note: Both FFs have asynchronous clear and set inputs. (2%) a) Draw the excitation table for the EM-FF. The abbreviated truth table is show here. (Use “don’t cares” when appropriate.) (4%) b) Complete the next-state truth table.
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Ex_2_F07 - University of Florida Department of Electrical...

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