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Sequential Logic Circuits - Technical MCQs

Q1:

A ripple counter's speed is limited by the propagation delay of:

A each flip-flop

B all flip-flops and gates

C the flip-flops only with gates

D only circuit gates

ANS:A - each flip-flop

A ripple counter is something that is derived by other flip-flops. Its like a series of Flip Flops. Output of one FF becomes the input of the next. Because ripple counter is composed of FF only and no gates are there other than FF, so only propagation delay of FF will be taken into account.