Digital Electronics - Flip-Flops - Discussion
Discussion Forum : Flip-Flops - General Questions (Q.No. 19)
19.
Four positive edge-triggered D flip-flops are used to store a 4-bit binary number as shown below. Determine if the circuit is functioning properly, and if not, what might be wrong.
Discussion:
12 comments Page 1 of 2.
Hemant Kumar Rajyora said:
2 years ago
I think Q2 is not following D2 as Q2 is 1, when the positive edge comes that output must follow the input.
But here Q2 is 0 when the positive edge of the clock has arrived, it must be 1.
But here Q2 is 0 when the positive edge of the clock has arrived, it must be 1.
Lala ji said:
2 years ago
@All.
D1=-1 is not correct.
that is D1=1.
D1=-1 is not correct.
that is D1=1.
Zarko said:
8 years ago
Answer B is correct only if D0=0.
Zarko said:
8 years ago
Answer B is correct only if D0=0.
Lakshmi said:
10 years ago
Explain how q2 is incorrect?
Preyksha said:
1 decade ago
Please elaborate how Q2 is incorrect?
Neha agrawal said:
1 decade ago
As there are two enable signals in each f/f i.e. clear which is active low and click which is active high. And acceleration to wave forms of click and clear we can see that when click is enabling the circuit, clear is disabling the circuit and vice versa.
So each f/f should hold its previous o/p throughout the operation. Q0, Q1, Q3 is doing the same But not Q2.
So each f/f should hold its previous o/p throughout the operation. Q0, Q1, Q3 is doing the same But not Q2.
Zarko Nozica said:
1 decade ago
Please explain what is the meaning of D = -1?
You probable meant 0? or what else?
You probable meant 0? or what else?
Raajee said:
1 decade ago
According to definition f-f stores either 1 or 0 not -1.
Ruksana said:
1 decade ago
What is the meaning of D = -1?
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