PDF Notes: WINSEM2025-26_VL_IASWE101_00100_ETH_2026-03-02_Design-of-counters_-Asynchronous_Synchronous-Counters---Up-and-Down-Counters---Modulo-counters_-Decade-Counter_ (1)

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    What is a counter in digital logic?

    A device that counts occurrences of events based on clock signals.

    How does an up counter function?

    It increments the count by one with each clock pulse.

    What distinguishes a synchronous counter from an asynchronous counter?

    Synchronous counters have all flip-flops clocked simultaneously.

    What is a binary counter?

    A counter that counts in binary sequence.

    What is the modulus of a counter?

    The total number of stable states a counter can indicate.

    What happens in a down counter on each clock pulse?

    It decrements the count by one.

    What is a decade counter?

    A counter that goes through 10 states, typically 0 to 9.

    What is the main disadvantage of asynchronous counters?

    They experience propagation delay due to ripple effect.

    What is the function of a flip-flop in a counter?

    It stores the state of the counter and toggles based on input.

    What is a ripple counter?

    An asynchronous counter where the output changes sequentially.

    How is a MOD-5 counter designed?

    It requires at least three flip-flops to count from 0 to 4.

    What is the role of combinational logic in a MOD counter?

    It resets the counter after reaching a specified count.

    What is the difference between a synchronous and asynchronous counter?

    Synchronous counters change states simultaneously; asynchronous do not.

    What is the counting sequence of a MOD-6 counter?

    It counts from 0 to 5 before resetting.

    What is the purpose of a mode control input in a counter?

    It determines whether the counter counts up or down.

    What is a Johnson counter?

    A type of ring counter that uses feedback to create a specific sequence.

    What is the function of a D flip-flop in a counter?

    It transfers the input value to the output on the clock edge.

    What is the significance of the clock pulse in counters?

    It triggers the counting action in flip-flops.

    What is a frequency counter?

    A counter that measures the frequency of input signals.

    What is the counting sequence of a MOD-10 counter?

    It counts from 0 to 9 before resetting.

    What is the primary use of counters in digital systems?

    To count occurrences of events and control sequences.