Electronics and Communication Engineering - Digital Electronics - Discussion

6. 

In a 4 bit ripple counter using flip flops with tpd = 40 ns, the maximum frequency can be

[A]. 1.25 MHz
[B]. 3.25 MHz
[C]. 6.25 MHz
[D]. 12.5 MHz

Answer: Option C

Explanation:

Total time delay = 40 x 4 = 160 x 100-9s. Hence .


Ajit said: (Aug 1, 2016)  
I think, It's Ghz.

M.Surekha said: (Nov 14, 2017)  
Answer is C it is in Mhz.

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