Question

What design is more effective a n 3 - Bit sequential counter with T Flip-Flops or a 3 - Bit sequential counter with D Flip-Flops. Why? Explain.

Answer 1

counter using d ff is recommended over t ff.

-> For t ff the state of Flip-Flop is known only when the previous state is known.

->They are not available as IC’s, hence they are constructed using JK Flip-Flop, D Flip-Flop etc, which increases no.of logic gates.

-> D- FF is data /delay type FF means its output only follow input but in synchronisation with clock and hence delayed by a clock. Its output doesn’t change if clock is disabled.

Whereas T flop is toggle FF which complements its output when input, T=1 and keep its output unchahe for input, T=0.so the count value may be false at some cases.

-> d flipflop is a data flipflop which store either 0 or 1 when inout 0 or 1;which mean what ever the input ;the output is same as input(stores)

t flipflop which gives toggles output for input 1;and it stores 0 for input 1