Consider the following statements regarding Counters:1.Asynchronous counters experience cumulative propagation delay due to ripple effect, limiting their operating speed in high-frequency applications.2.All synchronous counters are free from decoding glitches and hazards under all operating conditions.3.Synchronous counters eliminate ripple delay by clocking all flip-flops simultaneously, thereby improving speed and reliability.Which of the above statements is/are correct?
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Asynchronous or ripple counters clock each stage from the previous stage, so propagation delays accumulate. Synchronous counters clock all flip-flops together and are therefore faster, but combinational decoding can still exhibit hazards/glitches depending on implementation. Key relation: Ripple delay roughly accumulates with number of stages.
Exam focus: Synchronous eliminates ripple-clock delay, not every possible logic hazard. Common trap: Synchronous does not mean glitch-proof.
Formula / Key Relation
Ripple delay roughly accumulates with number of stages.
Detailed Explanation
Correct Answer: C - 1 and 3 only Quick Concept Explanation Asynchronous or ripple counters clock each stage from the previous stage, so propagation delays accumulate. Synchronous counters clock all flip-flops together and are therefore faster, but combinational decoding can still exhibit hazards/glitches depending on implementation. Key relation: Ripple delay roughly accumulates with number of stages.Exam focus: Synchronous eliminates ripple-clock delay, not every possible logic hazard. Common trap: Synchronous does not mean glitch-proof. Statement-wise Verification Statement 1 - Correct.Asynchronous counters experience cumulative propagation delay due to ripple effect, limiting their operating speed in high-frequency applications.Asynchronous or ripple counters clock each…
Correct Answer: C - 1 and 3 only
Quick Concept Explanation
Asynchronous or ripple counters clock each stage from the previous stage, so propagation delays accumulate. Synchronous counters clock all flip-flops together and are therefore faster, but combinational decoding can still exhibit hazards/glitches depending on implementation. Key relation: Ripple delay roughly accumulates with number of stages.
Exam focus: Synchronous eliminates ripple-clock delay, not every possible logic hazard. Common trap: Synchronous does not mean glitch-proof.
Statement-wise Verification
Statement 1 - Correct. Asynchronous counters experience cumulative propagation delay due to ripple effect, limiting their operating speed in high-frequency applications. Asynchronous or ripple counters clock each stage from the previous stage, so propagation delays accumulate.
Statement 2 - Incorrect. All synchronous counters are free from decoding glitches and hazards under all operating conditions. Synchronous clocking removes ripple delay but does not guarantee hazard-free decoding logic
Statement 3 - Correct. Synchronous counters eliminate ripple delay by clocking all flip-flops simultaneously, thereby improving speed and reliability. Synchronous counters clock all flip-flops together and are therefore faster
Core Concept
Asynchronous or ripple counters clock each stage from the previous stage, so propagation delays accumulate. Synchronous counters clock all flip-flops together and are therefore faster, but combinational decoding can still exhibit hazards/glitches depending on implementation.
Formula / Key Relationship
Ripple delay roughly accumulates with number of stages.
Why the Other Options Are Wrong
Option A is incorrect because it includes incorrect statement(s) 2 and omits correct statement(s) 3. Option B is incorrect because it includes incorrect statement(s) 2 and omits correct statement(s) 1. Option D is incorrect because it includes incorrect statement(s) 2.
Exam Shortcut / Approach
Synchronous eliminates ripple-clock delay, not every possible logic hazard.
Common Mistake
Synchronous does not mean glitch-proof.
Quick Revision
Synchronous and Asynchronous Counters is linked with Counters, Sequential Logic and Digital Electronics. Synchronous eliminates ripple-clock delay, not every possible logic hazard.
Quick Trick
Synchronous eliminates ripple-clock delay, not every possible logic hazard.
Why Other Options Are Wrong
Option A is incorrect because it includes incorrect statement(s) 2 and omits correct statement(s) 3. Option B is incorrect because it includes incorrect statement(s) 2 and omits correct statement(s) 1. Option D is incorrect because it includes incorrect statement(s) 2.
Common Mistake
Synchronous does not mean glitch-proof.
Exam Tip
Synchronous eliminates ripple-clock delay, not every possible logic hazard.
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