Circuits & Boolean Expressions
Example # 1: Unsimplified Circuit Develop a circuit and truth table from a Boolean expression Boolean Expression: X = A B C + A B C Simplify the Expression: X = A B C + A B C B C ( A + A ) B C ( 1 ) B C A ABC ABC+ABC ABC BC BC Unsimplified Circuit
_ Example # 1: Unsimplified X = A B C + A B C Example # 1: Simplified __ Example # 1: Simplified X = B C A B C X 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 1 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 1 A B C X 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 1 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 1 A B C _ A B C
Example # 2 Develop a truth table and Boolean Expression from a circuit: A B C X 1 A A AB B ABC C C Boolean Expression: X = A B C + C Simplified: X = A B + C Rule: AB + C = A + C
Develop a logic circuit and Boolean expression from a truth table Example # 3: Develop a logic circuit and Boolean expression from a truth table Boolean Expression: X = A B C + A B C + A B C Simplify: A B ( C + C ) + A B C A B + A B C 1 A B C X 0 0 0 0 0 0 1 0 0 1 0 1 0 1 1 1 1 0 0 0 1 0 1 1 1 1 0 0 1 1 1 0 A AB AB +ABC B AB ABC