Question 1 |

Consider a sequential digital circuit consisting of T flip-flops and D flip-flops as
shown in the figure. CLKIN is the clock input to the circuit. At the beginning,
Q1, Q2 and Q3 have values 0, 1 and 1, respectively.

Which one of the given values of (Q1, Q2, Q3) can NEVER be obtained with this digital circuit?

Which one of the given values of (Q1, Q2, Q3) can NEVER be obtained with this digital circuit?

(0, 0, 1) | |

(1, 0, 0) | |

(1, 0, 1) | |

(1, 1, 1) |

Question 1 Explanation:

Question 2 |

Consider a 3-bit counter, designed using T flip-flops, as shown below:

Assuming the initial state of the counter given by PQR as 000, what are the next three states?

Assuming the initial state of the counter given by PQR as 000, what are the next three states?

011,101,000 | |

001,010,111 | |

011,101,111 | |

001,010,000 |

Question 2 Explanation:

Question 3 |

A new flipflop with inputs X and Y, has the following property

\begin{array}{|c|c|c|c|} \hline \mathbf{X} & \mathbf{Y} & \text { Current state } & \text { Next state } \\ \hline 0 & 0 & Q & 1 \\ 0 & 1 & Q & \bar{Q} \\ 1 & 1 & Q & 0 \\ 1 & 0 & Q & Q \\ \hline \end{array}

Which of the following expresses the next state in terms of X,Y, current state?

\begin{array}{|c|c|c|c|} \hline \mathbf{X} & \mathbf{Y} & \text { Current state } & \text { Next state } \\ \hline 0 & 0 & Q & 1 \\ 0 & 1 & Q & \bar{Q} \\ 1 & 1 & Q & 0 \\ 1 & 0 & Q & Q \\ \hline \end{array}

Which of the following expresses the next state in terms of X,Y, current state?

(\bar{X} \wedge \bar{Q}) \vee(\bar{Y} \wedge Q) | |

(\bar{X} \wedge {Q}) \vee(\bar{Y} \wedge \bar{Q}) | |

({X} \wedge \bar{Q}) \vee({Y} \wedge {Q}) | |

({X} \wedge \bar{Q}) \vee(\bar{Y} \wedge {Q}) |

Question 3 Explanation:

Question 4 |

Consider the sequential circuit shown in the figure, where both flip-flops used are positive edge-triggered D flip-flops.

The number of states in the state transition diagram of this circuit that have a transition back to the same state on some value of "in" is _____.

The number of states in the state transition diagram of this circuit that have a transition back to the same state on some value of "in" is _____.

1 | |

2 | |

3 | |

4 |

Question 4 Explanation:

Question 5 |

Advantage of synchronous sequential circuits over asynchronous one is :

Lower hardware requirement | |

Better noise immunity | |

Faster operation | |

All of the above |

Question 5 Explanation:

There are 5 questions to complete.

please correct Qestion number 8

Answer is 4 Not 3

Thank You PRAFUL devendra,

We have updated the answer.

Update the first question the options are not correct its scrambled

Thank You Neeraj Hebbar,

We have updated the option

Q27 options are wrong..

a option should be 0110