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Calculate the maximum clock frequency at which a 4-bit asynchronous counter can work reliably. Assume the propagation delay of each flip-flop to be 40 ns and the width of the strobe pulse to be 20 ns.
  • a)
    12.5 MHz
  • b)
    6.25 MHz
  • c)
    5.56 MHz
  • d)
    16.67 MHz
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Calculate the maximum clock frequency at which a 4-bit asynchronous co...
Concept:
Lockout free condition: If a counter from an unused state enters one of the used states then the counter is called lock-out free. While taking any unused state as the initial state if the next state comes out to be a used state, the counter is said to be lockout free.
Synchronous counter: A counter in which all the flip-flops are triggered with the same clock pulse. In such counters, if the propagation delay of one flip-flop is tf, then the propagation delay for the whole counter will also be tf
Asynchronous counter: A counter in which all the flip flops are not triggered by the same clock pulse. In such counters, total propagation delay will be equal to the sum of propagation delay for all flip flops.
Calculation:
Given that, propagation delay of each flip-flop = 40 ns
Width of the strobe pulse = 20 ns
Total propagation delay = 40 × 4 + 20 = 180 ns
Maximum clock frequency
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Calculate the maximum clock frequency at which a 4-bit asynchronous counter can work reliably. Assume the propagation delay of each flip-flop to be 40 ns and the width of the strobe pulse to be 20 ns.a)12.5 MHzb)6.25 MHzc)5.56 MHzd)16.67 MHzCorrect answer is option 'C'. Can you explain this answer?
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Calculate the maximum clock frequency at which a 4-bit asynchronous counter can work reliably. Assume the propagation delay of each flip-flop to be 40 ns and the width of the strobe pulse to be 20 ns.a)12.5 MHzb)6.25 MHzc)5.56 MHzd)16.67 MHzCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Calculate the maximum clock frequency at which a 4-bit asynchronous counter can work reliably. Assume the propagation delay of each flip-flop to be 40 ns and the width of the strobe pulse to be 20 ns.a)12.5 MHzb)6.25 MHzc)5.56 MHzd)16.67 MHzCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Calculate the maximum clock frequency at which a 4-bit asynchronous counter can work reliably. Assume the propagation delay of each flip-flop to be 40 ns and the width of the strobe pulse to be 20 ns.a)12.5 MHzb)6.25 MHzc)5.56 MHzd)16.67 MHzCorrect answer is option 'C'. Can you explain this answer?.
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