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Consider the following statements:
1. Sequential circuits are always faster than combination circuits.
2. In an asynchronous circuit there is no problem of stability.
3. The logic circuits whose outputs at any instant of time depend only on the input signals present at that time are known as combinational circuits.
4. In a combinational circuit, for a change in the input, the output appears immediately.
5. In a sequential circuits, the output signals are fed back to the input side.
Which of the statement given above are correct? 
  • a)
    2, 3 and 4
  • b)
    1. and 5 only
  • c)
    3 and 5 only
  • d)
    1,2 and 4
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Consider the following statements:1. Sequential circuits are always fa...
• Combinational circuits are often faster than sequential circuits since the combinations circuits do not require memory whereas the sequential circuits need memory devices to perform their operations in sequence. Hence statement - 1 is not correct.
• in an asynchronous circuit, events are allowed to occur without any synchronisation In such a case, the system become: unstable which results in difficulties. Hence statement-2 is not correct.
• Statement-3 is correct which is the definitioi of a combinational circuit.
• in a combinational circuit, for a change if the input, the output appears immediately except for the propagation delay througt circuit gates. Thus, statement-4 is no correct.
• In a sequential circuit, an output signal is e function of the present input signals and e sequence of the past input signals i.e. the past output signals since the output signals are fed back to the input side. Hence, statement-5 is correct.
Thus, statements 3 and 5 are only correct.
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Most Upvoted Answer
Consider the following statements:1. Sequential circuits are always fa...
Combinational and Sequential Circuits
Sequential and combinational circuits are two fundamental types of digital circuits. Let's analyze the given statements in detail.

Statement 1: Sequential circuits are always faster than combination circuits.
- This statement is incorrect. The speed of a circuit depends on various factors such as the complexity of the design, propagation delays, clock frequency, etc. It is not accurate to say that sequential circuits are always faster than combinational circuits.

Statement 2: In an asynchronous circuit, there is no problem of stability.
- This statement is incorrect. Asynchronous circuits can face stability issues due to the lack of a global clock signal for synchronization. Timing hazards and race conditions can still occur in asynchronous designs.

Statement 3: The logic circuits whose outputs at any instant of time depend only on the input signals present at that time are known as combinational circuits.
- This statement is correct. Combinational circuits produce output solely based on the current input values without any memory elements.

Statement 4: In a combinational circuit, for a change in the input, the output appears immediately.
- This statement is correct. Combinational circuits generate output immediately after a change in the input values without requiring any clock signal for synchronization.

Statement 5: In sequential circuits, the output signals are fed back to the input side.
- This statement is correct. Sequential circuits utilize feedback to introduce memory elements, enabling them to store previous states and produce outputs based on both current inputs and past states.
Therefore, the correct statements from the given options are 3 and 5 only (option 'C').
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Consider the following statements:1. Sequential circuits are always faster than combination circuits.2. In an asynchronous circuit there is no problem of stability.3. The logic circuits whose outputs at any instant of time depend only on the input signals present at that time are known as combinational circuits.4. In a combinational circuit, for a change in the input, the output appears immediately.5. In a sequential circuits, the output signals are fed back to the input side.Which of the statement given above are correct?a)2, 3 and 4b)1. and 5 onlyc)3 and 5 onlyd)1,2 and 4Correct answer is option 'C'. Can you explain this answer?
Question Description
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