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13.7. Generating Boolean expression from logic circuit 257
13.7 Generating Boolean expression from logic
circuit
If a logic circuit is given, we can generate Boolean expression directly
from it. Consider the Figure 13.18. The Boolean expression for the
logic circuit is
Q = AB + (A + B)
A
Q
B
Figure 13.18:
A
AB
Q = AB + (A + B)
B A + B
Figure 13.19: Obtaining Boolean expression
Example
Write the Boolean expression for the logic diagram given in Figure
13.20 and simplify it and draw the logic diagram to implement the
simplified expression.
257
