Question
Download Solution PDFA five-bit asynchronous counter is shown in the figure. If the clock input frequency is 22⋅4 MHz, what is the frequency at the output E?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCounter circuits made from cascaded J-K flip-flops where each clock input receives its pulses from the output of the previous flip-flop invariably exhibit a ripple effect, where false output counts are generated between some steps of the count sequence. These types of counter circuits are called asynchronous counters, or ripple counters.
In the above 5-bit asynchronous counter the signal at the output of the last Flip flop will have a frequency is equal to the input clock frequency divided by the mod number of the counter.
Mod number of the above circuit is MOD = 25 = 32.
That means the above counter acts as MOD-32 counter.
The output of the last flip flop will have a frequency of 1/32 of the input clock frequency.
Output frequency = \(22⋅4 MHz\over 32\) = 700 KHz
Last updated on Jul 2, 2025
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