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Part 1: Logic Circuits, Truth Tables & Boolean Expressions Task: Work out the truth table of the logic circuits given below, and then write the Boolean expressions for the circuit, both the intermediate ones and the final one (output signal as a function of the input signals) For 1), 2) & 4) the input combinations in the truth tables are given, for 3) you fill it out. For 1) & 2) the intermediate outputs Boolean expression is given, for 3) & 4) you fill it in. Adjust the number of columns as needed for the number of intermediate and final outputs. Example: Below is a sample of how to proceed in determining the final Boolean expression for a given circuit. AB B C D AB+C (AB+C)D Figure 8.5 Boolean expression representing a Logic Circuit OUTPUT=(AB+C) D Assigned Logic Circuits 1) A A B ~B Output Q 0 0 0 1 1 0 1 1

          Part 1: Logic Circuits, Truth Tables & Boolean Expressions
Task:
Work out the truth table of the logic circuits given below, and then write the Boolean
expressions for the circuit, both the intermediate ones and the final one (output signal as a
function of the input signals)
For 1), 2) & 4) the input combinations in the truth tables are given, for 3) you fill it out.
For 1) & 2) the intermediate outputs Boolean expression is given, for 3) & 4) you fill it
in. Adjust the number of columns as needed for the number of intermediate and final
outputs.
Example:
Below is a sample of how to proceed in determining the final Boolean expression for a
given circuit.
AB
B
C
D
AB+C
(AB+C)D
Figure 8.5
Boolean expression representing a Logic Circuit
OUTPUT=(AB+C) D
Assigned Logic Circuits
1)
A
A
B
~B
Output Q
0
0
0
1
1
0
1
1

Part 1: Logic Circuits, Truth Tables Boolean Expressions
Task:
Work out the truth table of the logic circuits given below, and then write the Boolean
expressions for the circuit, both the intermediate ones and the final one (output signal as a
function of the input signals)
For 1), 2) 4) the input combinations in the truth tables are given, for 3) you fill it out.
For 1) 2) the intermediate outputs Boolean expression is given, for 3) 4) you fill it
in. Adjust the number of columns as needed for the number of intermediate and final
outputs.
Example:
Below is a sample of how to proceed in determining the final Boolean expression for a
given circuit.
AB
B
C
D
AB+C
(AB+C)D
Figure 8.5
Boolean expression representing a Logic Circuit
OUTPUT=(AB+C) D
Assigned Logic Circuits
1)
A
A
B
B
Output Q
0
0
0
1
1
0
1
1

Added by Courtney D.

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