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In a 7-stage ...

Question

In a 7-stage ripple counter, the propagation delay of a flip-flop is $50 n s$ . If the pulse width of the strobe pulse is $50 n s$ , then the maximum frequency at which the counter will operate reliably is

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Solution

$f_{m a x} = \frac{1}{n t_{f . f} + t_{s t r o b e}}$
$= \frac{1}{7 \times 50 + 50} \times 10^{9}$

$= 2.5 \times 10^{6} Hz$

$= 2.5 MHz$

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