Question

Two D-flip-flops, as shown below, are to be connected as a synchronous counter that goes through the following $Q_1$$Q_0$ sequence
00 $\to$ 01 $\to$ 11 $\to$ 10 $\to$ 00 $\to$ ...
The inputs $D_0$ and $D_1$ respectively should be connected as

• A. ${\overline{Q}}_1$$Q_0$ and ${\overline{Q}}_1$$Q_0$
• B. ${\overline{Q}}_0$ and $Q_1$
• C. ${\overline{Q}}_1$${\overline{Q}}_0$ and $Q_1$$Q_0$
• D. ${\overline{Q}}_1$ and $Q_0$

Answer 1

The correct option is D ${\overline{Q}}_1$ and $Q_0$

$Q_1$ $Q_0$ $D_1$($Q_0$) $D_0$$({\overline{Q}}_1$)
0 0 0 1
0 1 1 1
1 1 1 0
1 0 0 0