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Digital Electronics - Engineering

Q1:

A 4 bit modulo 16 ripple counter uses JK flip-flops. If the propagation delay of each FF is 50 ns. The max. clock frequency that can be used is equal to

A 20 MHz

B 10 MHz

C 5 MHz

D 4 MHz

ANS:C - 5 MHz

Propagation Delay for one FF is 50 nsec. For 4 FF = 50 x 4 = 200 nsec..