Modified on
13 Jun 2023 08:01 pm
Skill-Lync
Combinational logic circuits
Logic gates are the simplest combinational circuits. A combinational logic circuit is a circuit whose outputs only depend on the current state of its inputs. These circuits realize Boolean functions and deal with digitized signals, usually denoted by 0s and 1s.
The behavior of a combinational circuit is memoryless; given a stimulus to the input of a combinational circuit, a response appears at the output after some propagation delay, but the response is not stored or fed back. The output depends solely on its most recent input and is independent of the circuit’s past history.
There are three basic logic gates-
The universal logic gates are-
Let us try implementing combinational circuits in Simulink.
Example:1
For the expression -
Here,
Steps of solving:
When, A=0, B=0, C=1
When A=1, B=1, C=1
Example:2
For the expression- F=(A.B)+(A.B’)
1) Truth table
2. For this equation, we have chosen two AND gates, one Not gate to represent B complement, and an OR gate.
3. Simulink model for the logic gate implementation is given below
For A=1, B=1
For, A=0, B=1
Thus the logic gates for the combinational circuits have been computed.
Author
Navin Baskar
Author
Skill-Lync
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