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sample_midterm_1_sol

sample_midterm_1_sol - First Name Last Name PID CSE 140...

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First Name: Last Name: PID: CSE 140 Midterm 1 Tajana Simunic Rosing Winter 2009 z Do not start the exam until you are told to. z Turn off any cell phones or pagers. z Write your name and PID at the top of every page. Do not separate the pages. z This is a closed-book, closed-notes, no-calculator exam. You many only refer to one page of your own notes. z Do not look at anyone else’s exam. Do not talk to anyone but an exam proctor during the exam. z If you have a question, raise your hand and an exam proctor will come to you. z You have 80 minutes to finish the exam. When the time is finished, you must stop writing. z Write your answers in the space provided. z To get the most partial credit, clearly and neatly show all steps of your work. 1. 15 points 2. 15 points 3. 15 points 4. 15 points 5. 20 points 6. 20 points Total (100 points)

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First Name: Last Name: PID: Problem 1 (15 points) Construct a CMOS circuit that implements function F (A, B, C, D) with a minimum number of transistors. The circuit can only take A, B, C, D as its inputs. The complement variables A’, B’, C’, D’ are not available for the inputs. Convert this function to the form that is to be implemented, and draw the transistor network. )) ( ( ) ( ) , , , ( D C A B A D C B A F + + + = ) ( ) ( ) ( )) ( ( ) ( ) , , , ( D C B A D C A AB D C A AB D C A B A D C B A F + + = + + = + = + + + =