Question
Download Solution PDFWhat does the following flip flop configuration does ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
D Flip-flop
The truth table of the D flip-flop is given by:
|
D |
Q(t + 1) |
Remarks |
|
0 |
0 |
Reset |
|
1 |
1 |
Set |
The characteristic equation of the D flip-flop is:
Q(t + 1) = D
Analysis:
From the given configuration the input of the flip-flop is:
D = Q’
The below table shows the outputs for the corresponding inputs to the flip-flop.
Let the initial input be 0, that is D = 0 then Q = 0 and Q’ = 1
|
Clock |
D = Q’ |
Q |
Q’ |
|
Initial |
0 |
0 |
1 |
|
1 |
1 |
1 |
0 |
|
2 |
0 |
0 |
1 |
|
3 |
1 |
1 |
0 |
|
4 |
0 |
0 |
1 |
The output sequence is 0 1 0 1 0 1 ⋯
The output sequence is repeating after every two clock pulses. So, the counter value is 2.
The given configuration of the flip-flop represents the 1 – bit counter.
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