Page 72 - Computer science 868 Class 12
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Example 2: Draw the logic circuit diagram of the following Boolean expression (A'+B'+C')+A.B.
Ans. The gates will be (A NAND B NAND C) OR (A AND B) or (A' OR B' OR C') OR (A AND B).
The first one is drawn below:
A A'+B'+C'
B
C
(A'+B'+C') + A.B
A.B
Example 3: Draw the logic circuit diagram of the following Boolean expression ((A'+B+C).(B+C'))'.
Ans. The gate sequence will be (A' OR B OR C) NAND (B OR C').
A' (A'+B+C)
B
C
((A'+B+C).(B+C'))'
C' (B+C')
Example 4: Derive the Boolean expression of the following logic circuit.
Ans.
A A A'.B+A.B'
B B
(C.(A'.B+A.B'))'
C C
Example 5: Derive the Boolean expression of the following logic circuit.
Ans.
A
B
C
A A'.B'+A.B
B
(A'.B'+A.B).(B+C)'
C (B+C)'
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