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Testes e exames

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4. Complete a tabela de verdade de um comparador de grandeza de 2 bit.

B A X Y Z

B1 B0 A1 A0 B<A B=A B>A

0 0 0 0 0 1 0

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5. A figura seguinte representa a tabela de verdade de um circuito meio subtrator de 2 bit

5.1. Recorrendo ao mapa de Karnaugh, determine a expressão booleana simplificada da saída Co.

Entradas Saídas

B A S= B - A

Co

B1 B0 A1 A0 S1 S0

0 0 0 0 0 0 0

0 0 0 1 1 1 1

0 0 1 0 1 0 1

0 0 1 1 0 1 1

0 1 0 0 0 1 0

0 1 0 1 0 0 0

0 1 1 0 1 1 1

0 1 1 1 1 0 1

1 0 0 0 1 0 0

1 0 0 1 0 1 0

1 0 1 0 0 0 0

1 0 1 1 1 1 1

1 1 0 0 1 1 0

1 1 0 1 1 0 0

1 1 1 0 0 1 0

1 1 1 1 0 0 0

5.2. Represente o logigrama da mesma saída, Co.

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