Design Steps for Combination Logic Circuits with Example| 2024
Design Steps for Combination Logic Circuits with Example
Here are the design steps involved for designing a combinational logic circuit:
1-Determine the number of inputs and outputs from the specified functional behaviour.
2-Make a truth table to map inputs with outputs.
3-Use k-map for determining the boolean expression of the function.
4-Design the circuit using logic gates.
Assume that a large room has three doors and that a switch near each door controls a light in the room. Let x1, x2 and x3 be the input variables that denote the state of each switch. Light is OFF if all switches are open. Closing anyone of the switches will turn the light ON. Then turning ON a second switch will have to turn OFF the light. Thus the light will be ON if exactly one switch is closed, and it will be off if two (or no) switches are closed. If the light is OFF when two switches are closed, then it must be possible to turn it ON by closing the third switch. Design a circuit to implement specified functional behavior.
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