Digital-GrandTest1-Q12

A certain J-K FF has a propagation delay of 12ns. The largest MOD of the counter such that, the counter can be designed from these FFs which will operate up to 10 MHz?

reshown Jun 20

$\\ Time \ period \ of\ clock\ pulse=1/10MHz=10^{-7}sec\\ \\Propagation\ delay\ of \ each\ flip\ flop=12*10^{-9} sec\\ \\No. \ of\ FF\leq t_{clk}/t_{pd}=10^{-7}/12*10^{-9}=8.33=8\\ \\MOD\leqslant 2^{N}=2^{8}=256$