Electronics and Communication Engineering - Signals and Systems - Discussion
Discussion Forum : Signals and Systems - Section 1 (Q.No. 1)
1.
What about the stability of system in 
Answer: Option
Explanation:
ROC include the unit circle hence it is stable.
Discussion:
50 comments Page 2 of 5.
Mosin said:
6 years ago
What is Roc?
If we use control systems topic here.
The system is stable because all poles are lying on the right-hand side.
If we use control systems topic here.
The system is stable because all poles are lying on the right-hand side.
Khalique said:
1 decade ago
How one can know the stability when ROC is unknown? In above question ROC can be inward, outward or. 4<|z|<2.
Soumya said:
1 decade ago
Since the pole z=2 is outside the unit circle so it is unstable. II think the answer is wrong it cannot be stable.
Sathiya (ponds) said:
1 decade ago
The pole Z=2 lies outside the unitcircle. The ROC is not mentioned in this question so the system is unstable.
Iman said:
1 decade ago
I think the ROC would have to be mentioned in the question to answer the question. Like 0.4 < |z| < 2.
Abhishek sharma said:
1 decade ago
Either question is incomplete or its a wrong answer. Please refer some standards texts before putting it up.
Meena chintha said:
6 years ago
Pole is Z=2, the unit circle is 1. So it is unstable.
Then how, it should be stable? Explain it.
Then how, it should be stable? Explain it.
LD Nagar said:
1 decade ago
The ROC is not given. So we can not say this signal is RHS or LHS. So this system is unstable.
Bhuwan joshi said:
1 decade ago
Either they should give ROC.
4<z<2 for stability otherwise system will be unstable.
4<z<2 for stability otherwise system will be unstable.
Aiyoob said:
6 years ago
All poles are in the left half of s plane.
So, Use the concept of control system.
So, Use the concept of control system.
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