A 4-bit synchronous counter uses flip-flops with propagation delay times of 15 ns each. The
maximum possible time required for change of state will be
(A) 15 ns. (B) 30 ns.
(C) 45 ns. (D) 60 ns.
maximum possible time required for change of state will be
(A) 15 ns. (B) 30 ns.
(C) 45 ns. (D) 60 ns.