Question

For the logic circuit shown, the output waveform at Y is:

• A.

  

• B.

  

• C.

  

• D.

  

Hint:

Analyze the truth tables of individual gates to determine the final circuit output.

Answer 1

The Correct Option is A

Step 1: Analyze the circuit.- The given logic circuit is a combination of AND and OR gates.- Inputs A and B are given as:- A =1 for t =0 to 1, 3 to 4, and A = 0 for t = 1 to 3.- B =1 for t =2 to 4, and B =0 for t = 0 to 2.

Step 2: Compute intermediate and final outputs.- Output of AND gate: A·B = 1 if both A = 1 and B = 1.- Output of OR gate: A+B = 1 if either A = 1 or B = 1.- Final output Y = A·B + A:

- Y = 0 for t = 0 to 1.
- Y = 1 for t = 1 to 2.
- Y = 0 for t = 2 to 3.
- Y = 1 for t = 3 to 4.

Final Answer: The output waveform at Y matches Option 1