Open In App

GATE | GATE-CS-2005 | Question 64

Like Article
Like
Save
Share
Report

Consider the following circuit.  

The flip-flops are positive edge triggered D FFs. Each state is designated as a two bit string Q0Q1. Let the initial state be 00. The state transition sequence is:

 A)  
B) 
C)
D)

(A)

A

(B)

B

(C)

C

(D)

D



Answer: (D)

Explanation:

Q0 will toggle in every cycle because Q0\’ (Q0 complement) is fed as input to the D0 flip flop. For the D1 flip flop, D1 = Q0 ⊕ Q1\’ , i.e., Q0 XOR Q1\’. So, the bit pattern Q0 Q1 will be :

Q0     Q1

0      0

1      1

0      1

1      0

0      0

.      .

.      .

.      .

Thus, the transition sequence will be So, D would be the correct choice.    Please comment below if you find anything wrong in the above post.


Quiz of this Question
Please comment below if you find anything wrong in the above post


Last Updated : 29 Sep, 2021
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads