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Fall2000Exam1b_Solutions

# Fall2000Exam1b_Solutions - ECE 2030 Test 1 Fall 2000 Dr...

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ECE 2030 Test 1 Fall 2000 Dr. Heck This is a closed book, closed notes test. No calculators are allowed. You have 50 minutes to complete the test. Please show all of your work. Please abide by the Georgia Tech academic honor code. Violations will be handled in the appropriate manner. Solutions

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Problem 1 (10 Points): Write concise, clear answers. a) Why do we use both n-type and p-type transistors when building circuits to implement digital logic? n-type and p-type transistors are not ideal switches. n-type is good at pulling low while p-type is good at pulling high. Using both compensates for the nonideal behavior. b) What is the purpose of using Karnaugh maps? It helps to simplify expressions so that we implement the expressions with fewer transistors.
Problem 2 (20 Points): Complete the following switch level circuit and give the corresponding simplified Boolean algebra expression: D B A OUT + = +V D A B C A B D OUT

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Problem 3 (25 points): Suppose ( 29 B C D A F + + = , a) Create a switch level implementation for F using n-type and p-type transistors. Assume that both the
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Fall2000Exam1b_Solutions - ECE 2030 Test 1 Fall 2000 Dr...

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