The truth table of D flip-flop is given below: Choose exact characteristic equation based on above Truth TableC D Qn+1 O X Qn (Last State) $\uparrow$ 0 0 $\uparrow$ 1 1
Qn+1 = Dn
To determine the exact characteristic equation for a D flip-flop given the truth table, let's analyze the provided information:
| C | D | Qn+1 |
| 0 | X | Qn (Last State) |
| ↑ | 0 | 0 |
| ↑ | 1 | 1 |
- The truth table indicates how the D (data) and C (clock) inputs affect the output Qn+1.
- On the rising edge of the clock kernel (denoted by ↑), the output Qn+1 directly follows the D input.
- When C = 0, the output remains at its last state (Qn).
Based on this truth table:
- During the rising edge of C, if D=0, then Qn+1 = 0.
- During the rising edge of C, if D=1, then Qn+1 = 1.
From this behavior, we can derive the characteristic equation of the D flip-flop:
\(Q_{n+1} = D_n\)
The correct option based on the truth table and the behavior of a D flip-flop is Qn+1 = Dn, which matches the expected behavior where the output follows the input on the clock's rising edge.
Similar Questions
Read the following statements :
i. Gate is a combinational logic.
ii. JK Flip-flop in toggle mode is not combinational logic.
iii. MSJK FF suffers from race-around.
iv. Counters are sequential circuits.Which is correct ?
Which flip-flop can be used as latch ?
In a J-K FF, if J = Q and K = 1 (see figure). Assuming the flip flop was initially cleared and then clocked for 6 pulses, the sequence at the Q output will be :
Consider the following statements regarding registers and latches :
(A) Registers are made of edge triggered flip-flops whereas latches are made from level triggered flip flops
(B) Registers are temporary storage devices whereas latches are not
(C) A latch employs cross coupled feed back connections
(D) A register stores a binary word whereas a latch does notChoose the most appropriate answer from the options given below :
The toggle condition appears in J-K flip-flop when
A. J=1, K=1
B. J=0, K=0
C. J=0, K=1
D. J=1, K=0
E. J=0, K=1 and J=1, K=0
Choose the correct answer from the options given below :
Match List I with List II
LIST I (Diagram) LIST II (Sequential Circuit) A. 
I. Edge triggered S-R flip flop B. 
II. D Flip flop to SR flip flop C. 
III. Gated Latch clocked flip flop D. 
IV. Gated D Latch Choose the correct answer from the options given below:
Assertion (A) : Delay flip flop is used to store a single bit either 0 or 1.
Reason (R) : It has only one input, when clock is high and D input is also high, the output resets.
Assertion (A) : Asynchronous sequential circuit is also called event driven circuit.
Reason (R) : Event driven circuit does not have clock to trigger change of state. The states are changed by the change in input signal of the previous stage.
Select your answer using the codes given below.
For the circuit shown below consider the two statements :
Assertion (A) : The circuit is sequential.
Reason (R) : There is a loop in circuit.
Select your answer using the codes given below.
Flip Flop can be used to make :
(a) Latches
(b) Bounce-elimination switches
(c) ADDER
(d) Encoder
Which of the statements given above are correct ?
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